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kernel/audit.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* audit.c -- Auditing support |
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* Gateway between the kernel (e.g., selinux) and the user-space audit daemon. * System-call specific features have moved to auditsc.c * |
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* Copyright 2003-2007 Red Hat Inc., Durham, North Carolina. |
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* All Rights Reserved. * |
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* Written by Rickard E. (Rik) Faith <faith@redhat.com> * |
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* Goals: 1) Integrate fully with Security Modules. |
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* 2) Minimal run-time overhead: * a) Minimal when syscall auditing is disabled (audit_enable=0). * b) Small when syscall auditing is enabled and no audit record * is generated (defer as much work as possible to record * generation time): * i) context is allocated, * ii) names from getname are stored without a copy, and * iii) inode information stored from path_lookup. * 3) Ability to disable syscall auditing at boot time (audit=0). * 4) Usable by other parts of the kernel (if audit_log* is called, * then a syscall record will be generated automatically for the * current syscall). * 5) Netlink interface to user-space. * 6) Support low-overhead kernel-based filtering to minimize the * information that must be passed to user-space. * |
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* Audit userspace, documentation, tests, and bug/issue trackers: * https://github.com/linux-audit |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/file.h> |
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#include <linux/init.h> |
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#include <linux/types.h> |
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#include <linux/atomic.h> |
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#include <linux/mm.h> |
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#include <linux/export.h> |
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#include <linux/slab.h> |
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#include <linux/err.h> #include <linux/kthread.h> |
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#include <linux/kernel.h> |
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#include <linux/syscalls.h> |
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#include <linux/spinlock.h> #include <linux/rcupdate.h> #include <linux/mutex.h> #include <linux/gfp.h> |
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#include <linux/pid.h> |
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#include <linux/audit.h> #include <net/sock.h> |
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#include <net/netlink.h> |
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#include <linux/skbuff.h> |
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#ifdef CONFIG_SECURITY #include <linux/security.h> #endif |
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#include <linux/freezer.h> |
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#include <linux/pid_namespace.h> |
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#include <net/netns/generic.h> |
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#include "audit.h" |
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|
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/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED. |
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* (Initialization happens after skb_init is called.) */ |
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#define AUDIT_DISABLED -1 #define AUDIT_UNINITIALIZED 0 #define AUDIT_INITIALIZED 1 |
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static int audit_initialized = AUDIT_UNINITIALIZED; |
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|
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u32 audit_enabled = AUDIT_OFF; |
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bool audit_ever_enabled = !!AUDIT_OFF; |
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EXPORT_SYMBOL_GPL(audit_enabled); |
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/* Default state when kernel boots without any parameters. */ |
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static u32 audit_default = AUDIT_OFF; |
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/* If auditing cannot proceed, audit_failure selects what happens. */ |
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static u32 audit_failure = AUDIT_FAIL_PRINTK; |
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|
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/* private audit network namespace index */ static unsigned int audit_net_id; /** * struct audit_net - audit private network namespace data * @sk: communication socket */ struct audit_net { struct sock *sk; }; /** * struct auditd_connection - kernel/auditd connection state * @pid: auditd PID * @portid: netlink portid * @net: the associated network namespace |
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* @rcu: RCU head |
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* * Description: * This struct is RCU protected; you must either hold the RCU lock for reading |
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* or the associated spinlock for writing. |
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*/ |
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struct auditd_connection { |
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struct pid *pid; |
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u32 portid; struct net *net; |
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struct rcu_head rcu; |
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}; static struct auditd_connection __rcu *auditd_conn; |
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static DEFINE_SPINLOCK(auditd_conn_lock); |
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/* If audit_rate_limit is non-zero, limit the rate of sending audit records |
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* to that number per second. This prevents DoS attacks, but results in * audit records being dropped. */ |
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static u32 audit_rate_limit; |
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/* Number of outstanding audit_buffers allowed. * When set to zero, this means unlimited. */ |
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static u32 audit_backlog_limit = 64; |
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#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ) |
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static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME; |
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|
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/* The identity of the user shutting down the audit system. */ |
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static kuid_t audit_sig_uid = INVALID_UID; static pid_t audit_sig_pid = -1; |
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static u32 audit_sig_sid; |
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|
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/* Records can be lost in several ways: 0) [suppressed in audit_alloc] 1) out of memory in audit_log_start [kmalloc of struct audit_buffer] 2) out of memory in audit_log_move [alloc_skb] 3) suppressed due to audit_rate_limit 4) suppressed due to audit_backlog_limit */ |
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static atomic_t audit_lost = ATOMIC_INIT(0); |
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/* Monotonically increasing sum of time the kernel has spent * waiting while the backlog limit is exceeded. */ static atomic_t audit_backlog_wait_time_actual = ATOMIC_INIT(0); |
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/* Hash for inode-based rules */ struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; |
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static struct kmem_cache *audit_buffer_cache; |
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|
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/* queue msgs to send via kauditd_task */ |
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static struct sk_buff_head audit_queue; |
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/* queue msgs due to temporary unicast send problems */ static struct sk_buff_head audit_retry_queue; /* queue msgs waiting for new auditd connection */ |
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static struct sk_buff_head audit_hold_queue; |
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/* queue servicing thread */ |
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static struct task_struct *kauditd_task; static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait); |
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/* waitqueue for callers who are blocked on the audit backlog */ |
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static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait); |
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static struct audit_features af = {.vers = AUDIT_FEATURE_VERSION, .mask = -1, .features = 0, .lock = 0,}; |
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static char *audit_feature_names[2] = { |
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"only_unset_loginuid", |
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"loginuid_immutable", |
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}; |
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/** * struct audit_ctl_mutex - serialize requests from userspace * @lock: the mutex used for locking * @owner: the task which owns the lock * * Description: * This is the lock struct used to ensure we only process userspace requests * in an orderly fashion. We can't simply use a mutex/lock here because we * need to track lock ownership so we don't end up blocking the lock owner in * audit_log_start() or similar. */ static struct audit_ctl_mutex { struct mutex lock; void *owner; } audit_cmd_mutex; |
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/* AUDIT_BUFSIZ is the size of the temporary buffer used for formatting * audit records. Since printk uses a 1024 byte buffer, this buffer * should be at least that large. */ #define AUDIT_BUFSIZ 1024 |
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/* The audit_buffer is used when formatting an audit record. The caller * locks briefly to get the record off the freelist or to allocate the * buffer, and locks briefly to send the buffer to the netlink layer or * to place it on a transmit queue. Multiple audit_buffers can be in * use simultaneously. */ struct audit_buffer { |
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struct sk_buff *skb; /* formatted skb ready to send */ |
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struct audit_context *ctx; /* NULL or associated context */ |
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gfp_t gfp_mask; |
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}; |
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struct audit_reply { |
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__u32 portid; |
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struct net *net; |
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struct sk_buff *skb; }; |
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/** * auditd_test_task - Check to see if a given task is an audit daemon * @task: the task to check * * Description: * Return 1 if the task is a registered audit daemon, 0 otherwise. */ |
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int auditd_test_task(struct task_struct *task) |
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{ int rc; |
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struct auditd_connection *ac; |
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rcu_read_lock(); |
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ac = rcu_dereference(auditd_conn); rc = (ac && ac->pid == task_tgid(task) ? 1 : 0); |
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rcu_read_unlock(); return rc; } /** |
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* audit_ctl_lock - Take the audit control lock */ void audit_ctl_lock(void) { mutex_lock(&audit_cmd_mutex.lock); audit_cmd_mutex.owner = current; } /** * audit_ctl_unlock - Drop the audit control lock */ void audit_ctl_unlock(void) { audit_cmd_mutex.owner = NULL; mutex_unlock(&audit_cmd_mutex.lock); } /** * audit_ctl_owner_current - Test to see if the current task owns the lock * * Description: * Return true if the current task owns the audit control lock, false if it * doesn't own the lock. */ static bool audit_ctl_owner_current(void) { return (current == audit_cmd_mutex.owner); } /** |
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* auditd_pid_vnr - Return the auditd PID relative to the namespace |
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* * Description: |
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* Returns the PID in relation to the namespace, 0 on failure. |
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*/ |
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static pid_t auditd_pid_vnr(void) |
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{ pid_t pid; |
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const struct auditd_connection *ac; |
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rcu_read_lock(); |
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ac = rcu_dereference(auditd_conn); if (!ac || !ac->pid) |
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pid = 0; else |
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pid = pid_vnr(ac->pid); |
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rcu_read_unlock(); return pid; } /** |
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* audit_get_sk - Return the audit socket for the given network namespace * @net: the destination network namespace * * Description: * Returns the sock pointer if valid, NULL otherwise. The caller must ensure * that a reference is held for the network namespace while the sock is in use. */ static struct sock *audit_get_sk(const struct net *net) { struct audit_net *aunet; if (!net) return NULL; aunet = net_generic(net, audit_net_id); return aunet->sk; } |
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void audit_panic(const char *message) |
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{ |
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switch (audit_failure) { |
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case AUDIT_FAIL_SILENT: break; case AUDIT_FAIL_PRINTK: |
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if (printk_ratelimit()) |
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pr_err("%s ", message); |
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break; case AUDIT_FAIL_PANIC: |
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panic("audit: %s ", message); |
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break; } } static inline int audit_rate_check(void) { static unsigned long last_check = 0; static int messages = 0; static DEFINE_SPINLOCK(lock); unsigned long flags; unsigned long now; unsigned long elapsed; int retval = 0; if (!audit_rate_limit) return 1; spin_lock_irqsave(&lock, flags); if (++messages < audit_rate_limit) { retval = 1; } else { now = jiffies; elapsed = now - last_check; if (elapsed > HZ) { last_check = now; messages = 0; retval = 1; } } spin_unlock_irqrestore(&lock, flags); return retval; } |
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/** * audit_log_lost - conditionally log lost audit message event * @message: the message stating reason for lost audit message * * Emit at least 1 message per second, even if audit_rate_check is * throttling. * Always increment the lost messages counter. */ |
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void audit_log_lost(const char *message) { static unsigned long last_msg = 0; static DEFINE_SPINLOCK(lock); unsigned long flags; unsigned long now; int print; atomic_inc(&audit_lost); print = (audit_failure == AUDIT_FAIL_PANIC || !audit_rate_limit); if (!print) { spin_lock_irqsave(&lock, flags); now = jiffies; if (now - last_msg > HZ) { print = 1; last_msg = now; } spin_unlock_irqrestore(&lock, flags); } if (print) { |
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if (printk_ratelimit()) |
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pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u ", |
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atomic_read(&audit_lost), audit_rate_limit, audit_backlog_limit); |
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audit_panic(message); } |
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} |
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static int audit_log_config_change(char *function_name, u32 new, u32 old, |
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int allow_changes) |
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{ |
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struct audit_buffer *ab; int rc = 0; |
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ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_CONFIG_CHANGE); |
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if (unlikely(!ab)) return rc; |
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audit_log_format(ab, "op=set %s=%u old=%u ", function_name, new, old); |
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audit_log_session_info(ab); |
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rc = audit_log_task_context(ab); if (rc) allow_changes = 0; /* Something weird, deny request */ |
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audit_log_format(ab, " res=%d", allow_changes); audit_log_end(ab); |
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return rc; |
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} |
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static int audit_do_config_change(char *function_name, u32 *to_change, u32 new) |
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{ |
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int allow_changes, rc = 0; u32 old = *to_change; |
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/* check if we are locked */ |
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if (audit_enabled == AUDIT_LOCKED) allow_changes = 0; |
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else |
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allow_changes = 1; |
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if (audit_enabled != AUDIT_OFF) { |
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rc = audit_log_config_change(function_name, new, old, allow_changes); |
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if (rc) allow_changes = 0; |
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} |
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/* If we are allowed, make the change */ |
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if (allow_changes == 1) *to_change = new; |
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/* Not allowed, update reason */ else if (rc == 0) rc = -EPERM; return rc; |
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} |
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static int audit_set_rate_limit(u32 limit) |
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{ |
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return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit); |
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} |
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static int audit_set_backlog_limit(u32 limit) |
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{ |
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return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit); |
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} |
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static int audit_set_backlog_wait_time(u32 timeout) |
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{ return audit_do_config_change("audit_backlog_wait_time", |
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&audit_backlog_wait_time, timeout); |
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} |
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static int audit_set_enabled(u32 state) |
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{ |
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int rc; |
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if (state > AUDIT_LOCKED) |
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return -EINVAL; |
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rc = audit_do_config_change("audit_enabled", &audit_enabled, state); |
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if (!rc) audit_ever_enabled |= !!state; return rc; |
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} |
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static int audit_set_failure(u32 state) |
1da177e4c Linux-2.6.12-rc2 |
447 |
{ |
1da177e4c Linux-2.6.12-rc2 |
448 449 450 451 |
if (state != AUDIT_FAIL_SILENT && state != AUDIT_FAIL_PRINTK && state != AUDIT_FAIL_PANIC) return -EINVAL; |
ce29b682e [PATCH] More user... |
452 |
|
dc9eb698f audit: stop pushi... |
453 |
return audit_do_config_change("audit_failure", &audit_failure, state); |
1da177e4c Linux-2.6.12-rc2 |
454 |
} |
5b52330bb audit: fix auditd... |
455 |
/** |
48d0e023a audit: fix the RC... |
456 457 458 459 460 461 462 |
* auditd_conn_free - RCU helper to release an auditd connection struct * @rcu: RCU head * * Description: * Drop any references inside the auditd connection tracking struct and free * the memory. */ |
447a5647c treewide: Align f... |
463 464 |
static void auditd_conn_free(struct rcu_head *rcu) { |
48d0e023a audit: fix the RC... |
465 466 467 468 469 470 |
struct auditd_connection *ac; ac = container_of(rcu, struct auditd_connection, rcu); put_pid(ac->pid); put_net(ac->net); kfree(ac); |
447a5647c treewide: Align f... |
471 |
} |
48d0e023a audit: fix the RC... |
472 473 |
/** |
5b52330bb audit: fix auditd... |
474 475 476 477 478 479 480 |
* auditd_set - Set/Reset the auditd connection state * @pid: auditd PID * @portid: auditd netlink portid * @net: auditd network namespace pointer * * Description: * This function will obtain and drop network namespace references as |
48d0e023a audit: fix the RC... |
481 |
* necessary. Returns zero on success, negative values on failure. |
5b52330bb audit: fix auditd... |
482 |
*/ |
48d0e023a audit: fix the RC... |
483 |
static int auditd_set(struct pid *pid, u32 portid, struct net *net) |
5b52330bb audit: fix auditd... |
484 485 |
{ unsigned long flags; |
48d0e023a audit: fix the RC... |
486 |
struct auditd_connection *ac_old, *ac_new; |
5b52330bb audit: fix auditd... |
487 |
|
48d0e023a audit: fix the RC... |
488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 |
if (!pid || !net) return -EINVAL; ac_new = kzalloc(sizeof(*ac_new), GFP_KERNEL); if (!ac_new) return -ENOMEM; ac_new->pid = get_pid(pid); ac_new->portid = portid; ac_new->net = get_net(net); spin_lock_irqsave(&auditd_conn_lock, flags); ac_old = rcu_dereference_protected(auditd_conn, lockdep_is_held(&auditd_conn_lock)); rcu_assign_pointer(auditd_conn, ac_new); spin_unlock_irqrestore(&auditd_conn_lock, flags); if (ac_old) call_rcu(&ac_old->rcu, auditd_conn_free); return 0; |
5b52330bb audit: fix auditd... |
508 509 510 |
} /** |
cbb526219 audit: fix a kern... |
511 |
* kauditd_printk_skb - Print the audit record to the ring buffer |
5b52330bb audit: fix auditd... |
512 513 514 515 |
* @skb: audit record * * Whatever the reason, this packet may not make it to the auditd connection * so write it via printk so the information isn't completely lost. |
038cbcf65 Audit: unify the ... |
516 |
*/ |
af8b824f2 audit: rename the... |
517 |
static void kauditd_printk_skb(struct sk_buff *skb) |
038cbcf65 Audit: unify the ... |
518 519 |
{ struct nlmsghdr *nlh = nlmsg_hdr(skb); |
c64e66c67 audit: netlink: M... |
520 |
char *data = nlmsg_data(nlh); |
038cbcf65 Audit: unify the ... |
521 |
|
5b52330bb audit: fix auditd... |
522 523 524 525 526 527 528 529 |
if (nlh->nlmsg_type != AUDIT_EOE && printk_ratelimit()) pr_notice("type=%d %s ", nlh->nlmsg_type, data); } /** * kauditd_rehold_skb - Handle a audit record send failure in the hold queue * @skb: audit record |
b8d9e0aec audit: improve au... |
530 |
* @error: error code (unused) |
5b52330bb audit: fix auditd... |
531 532 533 534 535 |
* * Description: * This should only be used by the kauditd_thread when it fails to flush the * hold queue. */ |
b8d9e0aec audit: improve au... |
536 |
static void kauditd_rehold_skb(struct sk_buff *skb, __always_unused int error) |
5b52330bb audit: fix auditd... |
537 |
{ |
b8d9e0aec audit: improve au... |
538 539 |
/* put the record back in the queue */ skb_queue_tail(&audit_hold_queue, skb); |
c6480207f audit: rework the... |
540 541 542 543 544 |
} /** * kauditd_hold_skb - Queue an audit record, waiting for auditd * @skb: audit record |
b8d9e0aec audit: improve au... |
545 |
* @error: error code |
c6480207f audit: rework the... |
546 547 548 549 550 551 552 553 554 |
* * Description: * Queue the audit record, waiting for an instance of auditd. When this * function is called we haven't given up yet on sending the record, but things * are not looking good. The first thing we want to do is try to write the * record via printk and then see if we want to try and hold on to the record * and queue it, if we have room. If we want to hold on to the record, but we * don't have room, record a record lost message. */ |
b8d9e0aec audit: improve au... |
555 |
static void kauditd_hold_skb(struct sk_buff *skb, int error) |
c6480207f audit: rework the... |
556 557 558 559 560 561 |
{ /* at this point it is uncertain if we will ever send this to auditd so * try to send the message via printk before we go any further */ kauditd_printk_skb(skb); /* can we just silently drop the message? */ |
b8d9e0aec audit: improve au... |
562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 |
if (!audit_default) goto drop; /* the hold queue is only for when the daemon goes away completely, * not -EAGAIN failures; if we are in a -EAGAIN state requeue the * record on the retry queue unless it's full, in which case drop it */ if (error == -EAGAIN) { if (!audit_backlog_limit || skb_queue_len(&audit_retry_queue) < audit_backlog_limit) { skb_queue_tail(&audit_retry_queue, skb); return; } audit_log_lost("kauditd retry queue overflow"); goto drop; |
c6480207f audit: rework the... |
577 |
} |
b8d9e0aec audit: improve au... |
578 |
/* if we have room in the hold queue, queue the message */ |
c6480207f audit: rework the... |
579 580 581 582 583 |
if (!audit_backlog_limit || skb_queue_len(&audit_hold_queue) < audit_backlog_limit) { skb_queue_tail(&audit_hold_queue, skb); return; } |
038cbcf65 Audit: unify the ... |
584 |
|
c6480207f audit: rework the... |
585 586 |
/* we have no other options - drop the message */ audit_log_lost("kauditd hold queue overflow"); |
b8d9e0aec audit: improve au... |
587 |
drop: |
c6480207f audit: rework the... |
588 |
kfree_skb(skb); |
038cbcf65 Audit: unify the ... |
589 |
} |
c6480207f audit: rework the... |
590 591 592 |
/** * kauditd_retry_skb - Queue an audit record, attempt to send again to auditd * @skb: audit record |
b8d9e0aec audit: improve au... |
593 |
* @error: error code (unused) |
c6480207f audit: rework the... |
594 595 596 597 598 599 |
* * Description: * Not as serious as kauditd_hold_skb() as we still have a connected auditd, * but for some reason we are having problems sending it audit records so * queue the given record and attempt to resend. */ |
b8d9e0aec audit: improve au... |
600 |
static void kauditd_retry_skb(struct sk_buff *skb, __always_unused int error) |
f3d357b09 Audit: save audit... |
601 |
{ |
b8d9e0aec audit: improve au... |
602 603 604 605 606 607 608 609 610 611 |
if (!audit_backlog_limit || skb_queue_len(&audit_retry_queue) < audit_backlog_limit) { skb_queue_tail(&audit_retry_queue, skb); return; } /* we have to drop the record, send it via printk as a last effort */ kauditd_printk_skb(skb); audit_log_lost("kauditd retry queue overflow"); kfree_skb(skb); |
c6480207f audit: rework the... |
612 |
} |
32a1dbaec audit: try harder... |
613 |
|
c6480207f audit: rework the... |
614 |
/** |
264d50963 audit: make sure ... |
615 |
* auditd_reset - Disconnect the auditd connection |
c81be52a3 audit: fix a race... |
616 |
* @ac: auditd connection state |
264d50963 audit: make sure ... |
617 618 619 |
* * Description: * Break the auditd/kauditd connection and move all the queued records into the |
c81be52a3 audit: fix a race... |
620 621 622 623 |
* hold queue in case auditd reconnects. It is important to note that the @ac * pointer should never be dereferenced inside this function as it may be NULL * or invalid, you can only compare the memory address! If @ac is NULL then * the connection will always be reset. |
264d50963 audit: make sure ... |
624 |
*/ |
c81be52a3 audit: fix a race... |
625 |
static void auditd_reset(const struct auditd_connection *ac) |
264d50963 audit: make sure ... |
626 |
{ |
48d0e023a audit: fix the RC... |
627 |
unsigned long flags; |
264d50963 audit: make sure ... |
628 |
struct sk_buff *skb; |
48d0e023a audit: fix the RC... |
629 |
struct auditd_connection *ac_old; |
264d50963 audit: make sure ... |
630 631 |
/* if it isn't already broken, break the connection */ |
48d0e023a audit: fix the RC... |
632 633 634 |
spin_lock_irqsave(&auditd_conn_lock, flags); ac_old = rcu_dereference_protected(auditd_conn, lockdep_is_held(&auditd_conn_lock)); |
c81be52a3 audit: fix a race... |
635 636 637 638 639 |
if (ac && ac != ac_old) { /* someone already registered a new auditd connection */ spin_unlock_irqrestore(&auditd_conn_lock, flags); return; } |
48d0e023a audit: fix the RC... |
640 641 642 643 644 |
rcu_assign_pointer(auditd_conn, NULL); spin_unlock_irqrestore(&auditd_conn_lock, flags); if (ac_old) call_rcu(&ac_old->rcu, auditd_conn_free); |
264d50963 audit: make sure ... |
645 |
|
cd33f5f2c audit: make sure ... |
646 647 |
/* flush the retry queue to the hold queue, but don't touch the main * queue since we need to process that normally for multicast */ |
264d50963 audit: make sure ... |
648 |
while ((skb = skb_dequeue(&audit_retry_queue))) |
b8d9e0aec audit: improve au... |
649 |
kauditd_hold_skb(skb, -ECONNREFUSED); |
264d50963 audit: make sure ... |
650 651 652 |
} /** |
5b52330bb audit: fix auditd... |
653 654 |
* auditd_send_unicast_skb - Send a record via unicast to auditd * @skb: audit record |
c6480207f audit: rework the... |
655 656 |
* * Description: |
5b52330bb audit: fix auditd... |
657 658 659 660 661 |
* Send a skb to the audit daemon, returns positive/zero values on success and * negative values on failure; in all cases the skb will be consumed by this * function. If the send results in -ECONNREFUSED the connection with auditd * will be reset. This function may sleep so callers should not hold any locks * where this would cause a problem. |
c6480207f audit: rework the... |
662 |
*/ |
5b52330bb audit: fix auditd... |
663 |
static int auditd_send_unicast_skb(struct sk_buff *skb) |
c6480207f audit: rework the... |
664 |
{ |
5b52330bb audit: fix auditd... |
665 666 667 668 |
int rc; u32 portid; struct net *net; struct sock *sk; |
48d0e023a audit: fix the RC... |
669 |
struct auditd_connection *ac; |
5b52330bb audit: fix auditd... |
670 671 672 673 674 675 676 677 678 |
/* NOTE: we can't call netlink_unicast while in the RCU section so * take a reference to the network namespace and grab local * copies of the namespace, the sock, and the portid; the * namespace and sock aren't going to go away while we hold a * reference and if the portid does become invalid after the RCU * section netlink_unicast() should safely return an error */ rcu_read_lock(); |
48d0e023a audit: fix the RC... |
679 680 |
ac = rcu_dereference(auditd_conn); if (!ac) { |
5b52330bb audit: fix auditd... |
681 |
rcu_read_unlock(); |
b0659ae5e audit: fix memlea... |
682 |
kfree_skb(skb); |
5b52330bb audit: fix auditd... |
683 684 |
rc = -ECONNREFUSED; goto err; |
533c7b69c audit: use proper... |
685 |
} |
48d0e023a audit: fix the RC... |
686 |
net = get_net(ac->net); |
5b52330bb audit: fix auditd... |
687 |
sk = audit_get_sk(net); |
48d0e023a audit: fix the RC... |
688 |
portid = ac->portid; |
5b52330bb audit: fix auditd... |
689 |
rcu_read_unlock(); |
c6480207f audit: rework the... |
690 |
|
5b52330bb audit: fix auditd... |
691 692 693 694 695 696 697 698 |
rc = netlink_unicast(sk, skb, portid, 0); put_net(net); if (rc < 0) goto err; return rc; err: |
c81be52a3 audit: fix a race... |
699 700 |
if (ac && rc == -ECONNREFUSED) auditd_reset(ac); |
5b52330bb audit: fix auditd... |
701 |
return rc; |
c6480207f audit: rework the... |
702 703 704 |
} /** |
5b52330bb audit: fix auditd... |
705 706 707 708 709 710 711 712 713 714 715 716 717 |
* kauditd_send_queue - Helper for kauditd_thread to flush skb queues * @sk: the sending sock * @portid: the netlink destination * @queue: the skb queue to process * @retry_limit: limit on number of netlink unicast failures * @skb_hook: per-skb hook for additional processing * @err_hook: hook called if the skb fails the netlink unicast send * * Description: * Run through the given queue and attempt to send the audit records to auditd, * returns zero on success, negative values on failure. It is up to the caller * to ensure that the @sk is valid for the duration of this function. * |
c6480207f audit: rework the... |
718 |
*/ |
5b52330bb audit: fix auditd... |
719 720 721 722 |
static int kauditd_send_queue(struct sock *sk, u32 portid, struct sk_buff_head *queue, unsigned int retry_limit, void (*skb_hook)(struct sk_buff *skb), |
b8d9e0aec audit: improve au... |
723 |
void (*err_hook)(struct sk_buff *skb, int error)) |
c6480207f audit: rework the... |
724 |
{ |
5b52330bb audit: fix auditd... |
725 |
int rc = 0; |
b8d9e0aec audit: improve au... |
726 727 |
struct sk_buff *skb = NULL; struct sk_buff *skb_tail; |
a5f4d17da audit: improve ro... |
728 |
unsigned int failed = 0; |
32a1dbaec audit: try harder... |
729 |
|
5b52330bb audit: fix auditd... |
730 731 |
/* NOTE: kauditd_thread takes care of all our locking, we just use * the netlink info passed to us (e.g. sk and portid) */ |
b8d9e0aec audit: improve au... |
732 733 |
skb_tail = skb_peek_tail(queue); while ((skb != skb_tail) && (skb = skb_dequeue(queue))) { |
5b52330bb audit: fix auditd... |
734 735 736 737 738 739 740 |
/* call the skb_hook for each skb we touch */ if (skb_hook) (*skb_hook)(skb); /* can we send to anyone via unicast? */ if (!sk) { if (err_hook) |
b8d9e0aec audit: improve au... |
741 |
(*err_hook)(skb, -ECONNREFUSED); |
5b52330bb audit: fix auditd... |
742 743 |
continue; } |
6c54e7899 audit: handle a c... |
744 |
|
a5f4d17da audit: improve ro... |
745 |
retry: |
5b52330bb audit: fix auditd... |
746 747 748 749 |
/* grab an extra skb reference in case of error */ skb_get(skb); rc = netlink_unicast(sk, skb, portid, 0); if (rc < 0) { |
a5f4d17da audit: improve ro... |
750 |
/* send failed - try a few times unless fatal error */ |
5b52330bb audit: fix auditd... |
751 752 |
if (++failed >= retry_limit || rc == -ECONNREFUSED || rc == -EPERM) { |
5b52330bb audit: fix auditd... |
753 754 |
sk = NULL; if (err_hook) |
b8d9e0aec audit: improve au... |
755 |
(*err_hook)(skb, rc); |
a5f4d17da audit: improve ro... |
756 757 758 |
if (rc == -EAGAIN) rc = 0; /* continue to drain the queue */ |
5b52330bb audit: fix auditd... |
759 760 |
continue; } else |
a5f4d17da audit: improve ro... |
761 |
goto retry; |
5b52330bb audit: fix auditd... |
762 |
} else { |
a5f4d17da audit: improve ro... |
763 |
/* skb sent - drop the extra reference and continue */ |
5b52330bb audit: fix auditd... |
764 765 766 |
consume_skb(skb); failed = 0; } |
c6480207f audit: rework the... |
767 |
} |
5b52330bb audit: fix auditd... |
768 |
return (rc >= 0 ? 0 : rc); |
f3d357b09 Audit: save audit... |
769 |
} |
b551d1d98 audit: refactor h... |
770 |
/* |
c6480207f audit: rework the... |
771 772 |
* kauditd_send_multicast_skb - Send a record to any multicast listeners * @skb: audit record |
451f92163 audit: add netlin... |
773 |
* |
c6480207f audit: rework the... |
774 |
* Description: |
5b52330bb audit: fix auditd... |
775 776 777 |
* Write a multicast message to anyone listening in the initial network * namespace. This function doesn't consume an skb as might be expected since * it has to copy it anyways. |
451f92163 audit: add netlin... |
778 |
*/ |
c6480207f audit: rework the... |
779 |
static void kauditd_send_multicast_skb(struct sk_buff *skb) |
451f92163 audit: add netlin... |
780 |
{ |
c6480207f audit: rework the... |
781 |
struct sk_buff *copy; |
5b52330bb audit: fix auditd... |
782 |
struct sock *sock = audit_get_sk(&init_net); |
c6480207f audit: rework the... |
783 |
struct nlmsghdr *nlh; |
451f92163 audit: add netlin... |
784 |
|
5b52330bb audit: fix auditd... |
785 786 |
/* NOTE: we are not taking an additional reference for init_net since * we don't have to worry about it going away */ |
7f74ecd78 audit: send multi... |
787 788 |
if (!netlink_has_listeners(sock, AUDIT_NLGRP_READLOG)) return; |
451f92163 audit: add netlin... |
789 790 791 792 793 794 795 796 797 798 |
/* * The seemingly wasteful skb_copy() rather than bumping the refcount * using skb_get() is necessary because non-standard mods are made to * the skb by the original kaudit unicast socket send routine. The * existing auditd daemon assumes this breakage. Fixing this would * require co-ordinating a change in the established protocol between * the kaudit kernel subsystem and the auditd userspace code. There is * no reason for new multicast clients to continue with this * non-compliance. */ |
c6480207f audit: rework the... |
799 |
copy = skb_copy(skb, GFP_KERNEL); |
451f92163 audit: add netlin... |
800 801 |
if (!copy) return; |
c6480207f audit: rework the... |
802 803 |
nlh = nlmsg_hdr(copy); nlh->nlmsg_len = skb->len; |
451f92163 audit: add netlin... |
804 |
|
c6480207f audit: rework the... |
805 |
nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, GFP_KERNEL); |
451f92163 audit: add netlin... |
806 |
} |
c6480207f audit: rework the... |
807 |
/** |
5b52330bb audit: fix auditd... |
808 809 |
* kauditd_thread - Worker thread to send audit records to userspace * @dummy: unused |
b551d1d98 audit: refactor h... |
810 |
*/ |
97a41e261 [PATCH] kernel/: ... |
811 |
static int kauditd_thread(void *dummy) |
b7d112581 AUDIT: Send netli... |
812 |
{ |
c6480207f audit: rework the... |
813 |
int rc; |
5b52330bb audit: fix auditd... |
814 815 816 |
u32 portid = 0; struct net *net = NULL; struct sock *sk = NULL; |
48d0e023a audit: fix the RC... |
817 |
struct auditd_connection *ac; |
4aa83872d audit: queue netl... |
818 |
|
c6480207f audit: rework the... |
819 |
#define UNICAST_RETRIES 5 |
c6480207f audit: rework the... |
820 |
|
831441862 Freezer: make ker... |
821 |
set_freezable(); |
4899b8b16 [PATCH] kauditd_t... |
822 |
while (!kthread_should_stop()) { |
5b52330bb audit: fix auditd... |
823 824 |
/* NOTE: see the lock comments in auditd_send_unicast_skb() */ rcu_read_lock(); |
48d0e023a audit: fix the RC... |
825 826 |
ac = rcu_dereference(auditd_conn); if (!ac) { |
5b52330bb audit: fix auditd... |
827 828 829 |
rcu_read_unlock(); goto main_queue; } |
48d0e023a audit: fix the RC... |
830 |
net = get_net(ac->net); |
5b52330bb audit: fix auditd... |
831 |
sk = audit_get_sk(net); |
48d0e023a audit: fix the RC... |
832 |
portid = ac->portid; |
5b52330bb audit: fix auditd... |
833 |
rcu_read_unlock(); |
c6480207f audit: rework the... |
834 835 |
/* attempt to flush the hold queue */ |
5b52330bb audit: fix auditd... |
836 837 838 |
rc = kauditd_send_queue(sk, portid, &audit_hold_queue, UNICAST_RETRIES, NULL, kauditd_rehold_skb); |
c34c78dfc audit: remove red... |
839 |
if (rc < 0) { |
5b52330bb audit: fix auditd... |
840 |
sk = NULL; |
c81be52a3 audit: fix a race... |
841 |
auditd_reset(ac); |
5b52330bb audit: fix auditd... |
842 |
goto main_queue; |
c6480207f audit: rework the... |
843 |
} |
f3d357b09 Audit: save audit... |
844 |
|
c6480207f audit: rework the... |
845 |
/* attempt to flush the retry queue */ |
5b52330bb audit: fix auditd... |
846 847 848 |
rc = kauditd_send_queue(sk, portid, &audit_retry_queue, UNICAST_RETRIES, NULL, kauditd_hold_skb); |
c34c78dfc audit: remove red... |
849 |
if (rc < 0) { |
5b52330bb audit: fix auditd... |
850 |
sk = NULL; |
c81be52a3 audit: fix a race... |
851 |
auditd_reset(ac); |
5b52330bb audit: fix auditd... |
852 |
goto main_queue; |
c6480207f audit: rework the... |
853 |
} |
db8973194 audit: efficiency... |
854 |
|
5b52330bb audit: fix auditd... |
855 856 857 858 |
main_queue: /* process the main queue - do the multicast send and attempt * unicast, dump failed record sends to the retry queue; if * sk == NULL due to previous failures we will just do the |
c81be52a3 audit: fix a race... |
859 |
* multicast send and move the record to the hold queue */ |
264d50963 audit: make sure ... |
860 861 |
rc = kauditd_send_queue(sk, portid, &audit_queue, 1, kauditd_send_multicast_skb, |
c81be52a3 audit: fix a race... |
862 863 864 865 |
(sk ? kauditd_retry_skb : kauditd_hold_skb)); if (ac && rc < 0) auditd_reset(ac); |
264d50963 audit: make sure ... |
866 |
sk = NULL; |
5b52330bb audit: fix auditd... |
867 868 869 870 871 |
/* drop our netns reference, no auditd sends past this line */ if (net) { put_net(net); net = NULL; |
3320c5133 audit: flatten ka... |
872 |
} |
5b52330bb audit: fix auditd... |
873 874 875 876 877 878 879 880 881 882 |
/* we have processed all the queues so wake everyone */ wake_up(&audit_backlog_wait); /* NOTE: we want to wake up if there is anything on the queue, * regardless of if an auditd is connected, as we need to * do the multicast send and rotate records from the * main queue to the retry/hold queues */ wait_event_freezable(kauditd_wait, (skb_queue_len(&audit_queue) ? 1 : 0)); |
b7d112581 AUDIT: Send netli... |
883 |
} |
c6480207f audit: rework the... |
884 |
|
4899b8b16 [PATCH] kauditd_t... |
885 |
return 0; |
b7d112581 AUDIT: Send netli... |
886 |
} |
3054d0671 audit: fix a net ... |
887 |
int audit_send_list_thread(void *_dest) |
9044e6bca [PATCH] fix deadl... |
888 889 |
{ struct audit_netlink_list *dest = _dest; |
9044e6bca [PATCH] fix deadl... |
890 |
struct sk_buff *skb; |
5b52330bb audit: fix auditd... |
891 |
struct sock *sk = audit_get_sk(dest->net); |
9044e6bca [PATCH] fix deadl... |
892 893 |
/* wait for parent to finish and send an ACK */ |
ce423631c audit: track the ... |
894 895 |
audit_ctl_lock(); audit_ctl_unlock(); |
9044e6bca [PATCH] fix deadl... |
896 897 |
while ((skb = __skb_dequeue(&dest->q)) != NULL) |
5b52330bb audit: fix auditd... |
898 |
netlink_unicast(sk, skb, dest->portid, 0); |
9044e6bca [PATCH] fix deadl... |
899 |
|
5b52330bb audit: fix auditd... |
900 |
put_net(dest->net); |
9044e6bca [PATCH] fix deadl... |
901 902 903 904 |
kfree(dest); return 0; } |
45a0642b4 audit: kernel gen... |
905 |
struct sk_buff *audit_make_reply(int seq, int type, int done, |
b8800aa5d audit: make funct... |
906 |
int multi, const void *payload, int size) |
9044e6bca [PATCH] fix deadl... |
907 908 909 |
{ struct sk_buff *skb; struct nlmsghdr *nlh; |
9044e6bca [PATCH] fix deadl... |
910 911 912 |
void *data; int flags = multi ? NLM_F_MULTI : 0; int t = done ? NLMSG_DONE : type; |
ee080e6ce Audit: cleanup ne... |
913 |
skb = nlmsg_new(size, GFP_KERNEL); |
9044e6bca [PATCH] fix deadl... |
914 915 |
if (!skb) return NULL; |
45a0642b4 audit: kernel gen... |
916 |
nlh = nlmsg_put(skb, 0, seq, t, size, flags); |
c64e66c67 audit: netlink: M... |
917 918 919 |
if (!nlh) goto out_kfree_skb; data = nlmsg_data(nlh); |
9044e6bca [PATCH] fix deadl... |
920 921 |
memcpy(data, payload, size); return skb; |
c64e66c67 audit: netlink: M... |
922 923 |
out_kfree_skb: kfree_skb(skb); |
9044e6bca [PATCH] fix deadl... |
924 925 |
return NULL; } |
a48b284b4 audit: fix a net ... |
926 927 928 929 |
static void audit_free_reply(struct audit_reply *reply) { if (!reply) return; |
c07203516 audit: Remove red... |
930 |
kfree_skb(reply->skb); |
a48b284b4 audit: fix a net ... |
931 932 933 934 |
if (reply->net) put_net(reply->net); kfree(reply); } |
f09ac9db2 Audit: stop deadl... |
935 936 937 |
static int audit_send_reply_thread(void *arg) { struct audit_reply *reply = (struct audit_reply *)arg; |
ce423631c audit: track the ... |
938 939 |
audit_ctl_lock(); audit_ctl_unlock(); |
f09ac9db2 Audit: stop deadl... |
940 941 942 |
/* Ignore failure. It'll only happen if the sender goes away, because our timeout is set to infinite. */ |
a48b284b4 audit: fix a net ... |
943 944 945 |
netlink_unicast(audit_get_sk(reply->net), reply->skb, reply->portid, 0); reply->skb = NULL; audit_free_reply(reply); |
f09ac9db2 Audit: stop deadl... |
946 947 |
return 0; } |
c6480207f audit: rework the... |
948 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
949 950 |
/** * audit_send_reply - send an audit reply message via netlink |
d211f177b audit: Update kdo... |
951 |
* @request_skb: skb of request we are replying to (used to target the reply) |
b0dd25a82 [PATCH] AUDIT: ke... |
952 953 954 955 956 957 958 |
* @seq: sequence number * @type: audit message type * @done: done (last) flag * @multi: multi-part message flag * @payload: payload data * @size: payload size * |
a48b284b4 audit: fix a net ... |
959 |
* Allocates a skb, builds the netlink message, and sends it to the port id. |
b0dd25a82 [PATCH] AUDIT: ke... |
960 |
*/ |
6f285b19d audit: Send repli... |
961 |
static void audit_send_reply(struct sk_buff *request_skb, int seq, int type, int done, |
f9441639e audit: fix netlin... |
962 |
int multi, const void *payload, int size) |
1da177e4c Linux-2.6.12-rc2 |
963 |
{ |
f09ac9db2 Audit: stop deadl... |
964 |
struct task_struct *tsk; |
a48b284b4 audit: fix a net ... |
965 |
struct audit_reply *reply; |
f09ac9db2 Audit: stop deadl... |
966 |
|
a48b284b4 audit: fix a net ... |
967 |
reply = kzalloc(sizeof(*reply), GFP_KERNEL); |
f09ac9db2 Audit: stop deadl... |
968 969 |
if (!reply) return; |
a48b284b4 audit: fix a net ... |
970 971 972 973 |
reply->skb = audit_make_reply(seq, type, done, multi, payload, size); if (!reply->skb) goto err; reply->net = get_net(sock_net(NETLINK_CB(request_skb).sk)); |
45a0642b4 audit: kernel gen... |
974 |
reply->portid = NETLINK_CB(request_skb).portid; |
f09ac9db2 Audit: stop deadl... |
975 976 |
tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply"); |
a48b284b4 audit: fix a net ... |
977 978 979 980 981 982 983 |
if (IS_ERR(tsk)) goto err; return; err: audit_free_reply(reply); |
1da177e4c Linux-2.6.12-rc2 |
984 985 986 987 988 989 |
} /* * Check for appropriate CAP_AUDIT_ capabilities on incoming audit * control messages. */ |
c7bdb545d [NETLINK]: Encaps... |
990 |
static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type) |
1da177e4c Linux-2.6.12-rc2 |
991 992 |
{ int err = 0; |
5a3cb3b6c audit: allow user... |
993 |
/* Only support initial user namespace for now. */ |
aa4af831b AUDIT: Allow logi... |
994 995 996 997 998 999 1000 1001 1002 1003 |
/* * We return ECONNREFUSED because it tricks userspace into thinking * that audit was not configured into the kernel. Lots of users * configure their PAM stack (because that's what the distro does) * to reject login if unable to send messages to audit. If we return * ECONNREFUSED the PAM stack thinks the kernel does not have audit * configured in and will let login proceed. If we return EPERM * userspace will reject all logins. This should be removed when we * support non init namespaces!! */ |
0b747172d Merge git://git.i... |
1004 |
if (current_user_ns() != &init_user_ns) |
aa4af831b AUDIT: Allow logi... |
1005 |
return -ECONNREFUSED; |
34e36d8ec audit: Limit audi... |
1006 |
|
1da177e4c Linux-2.6.12-rc2 |
1007 |
switch (msg_type) { |
1da177e4c Linux-2.6.12-rc2 |
1008 |
case AUDIT_LIST: |
1da177e4c Linux-2.6.12-rc2 |
1009 1010 |
case AUDIT_ADD: case AUDIT_DEL: |
189009091 audit: remove the... |
1011 1012 1013 |
return -EOPNOTSUPP; case AUDIT_GET: case AUDIT_SET: |
b0fed4021 audit: implement ... |
1014 1015 |
case AUDIT_GET_FEATURE: case AUDIT_SET_FEATURE: |
189009091 audit: remove the... |
1016 1017 |
case AUDIT_LIST_RULES: case AUDIT_ADD_RULE: |
93315ed6d [PATCH] audit str... |
1018 |
case AUDIT_DEL_RULE: |
c2f0c7c35 The attached patc... |
1019 |
case AUDIT_SIGNAL_INFO: |
522ed7767 Audit: add TTY in... |
1020 1021 |
case AUDIT_TTY_GET: case AUDIT_TTY_SET: |
74c3cbe33 [PATCH] audit: wa... |
1022 1023 |
case AUDIT_TRIM: case AUDIT_MAKE_EQUIV: |
5a3cb3b6c audit: allow user... |
1024 1025 |
/* Only support auditd and auditctl in initial pid namespace * for now. */ |
5985de675 audit: code clean up |
1026 |
if (task_active_pid_ns(current) != &init_pid_ns) |
5a3cb3b6c audit: allow user... |
1027 |
return -EPERM; |
90f62cf30 net: Use netlink_... |
1028 |
if (!netlink_capable(skb, CAP_AUDIT_CONTROL)) |
1da177e4c Linux-2.6.12-rc2 |
1029 1030 |
err = -EPERM; break; |
05474106a AUDIT: Fix AVC_US... |
1031 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
1032 1033 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
90f62cf30 net: Use netlink_... |
1034 |
if (!netlink_capable(skb, CAP_AUDIT_WRITE)) |
1da177e4c Linux-2.6.12-rc2 |
1035 1036 1037 1038 1039 1040 1041 1042 |
err = -EPERM; break; default: /* bad msg */ err = -EINVAL; } return err; } |
626abcd13 audit: add syscal... |
1043 1044 |
static void audit_log_common_recv_msg(struct audit_context *context, struct audit_buffer **ab, u16 msg_type) |
50397bd1e [AUDIT] clean up ... |
1045 |
{ |
dc9eb698f audit: stop pushi... |
1046 |
uid_t uid = from_kuid(&init_user_ns, current_uid()); |
f1dc4867f audit: anchor all... |
1047 |
pid_t pid = task_tgid_nr(current); |
50397bd1e [AUDIT] clean up ... |
1048 |
|
0868a5e15 audit: printk USE... |
1049 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) { |
50397bd1e [AUDIT] clean up ... |
1050 |
*ab = NULL; |
233a68667 audit: make audit... |
1051 |
return; |
50397bd1e [AUDIT] clean up ... |
1052 |
} |
626abcd13 audit: add syscal... |
1053 |
*ab = audit_log_start(context, GFP_KERNEL, msg_type); |
0644ec0cc audit: catch poss... |
1054 |
if (unlikely(!*ab)) |
233a68667 audit: make audit... |
1055 |
return; |
a2c97da11 audit: use sessio... |
1056 |
audit_log_format(*ab, "pid=%d uid=%u ", pid, uid); |
4d3fb709b helper for some s... |
1057 |
audit_log_session_info(*ab); |
b122c3767 audit: use a cons... |
1058 |
audit_log_task_context(*ab); |
50397bd1e [AUDIT] clean up ... |
1059 |
} |
626abcd13 audit: add syscal... |
1060 1061 1062 1063 1064 |
static inline void audit_log_user_recv_msg(struct audit_buffer **ab, u16 msg_type) { audit_log_common_recv_msg(NULL, ab, msg_type); } |
b0fed4021 audit: implement ... |
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 |
int is_audit_feature_set(int i) { return af.features & AUDIT_FEATURE_TO_MASK(i); } static int audit_get_feature(struct sk_buff *skb) { u32 seq; seq = nlmsg_hdr(skb)->nlmsg_seq; |
9ef915147 audit: correct AU... |
1076 |
audit_send_reply(skb, seq, AUDIT_GET_FEATURE, 0, 0, &af, sizeof(af)); |
b0fed4021 audit: implement ... |
1077 1078 1079 1080 1081 1082 1083 1084 |
return 0; } static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature, u32 old_lock, u32 new_lock, int res) { struct audit_buffer *ab; |
b6c50fe0b audit: don't gene... |
1085 1086 |
if (audit_enabled == AUDIT_OFF) return; |
2a1fe215e audit: use curren... |
1087 |
|
cdfb6b341 audit: use inline... |
1088 |
ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_FEATURE_CHANGE); |
23138ead2 audit: return on ... |
1089 1090 |
if (!ab) return; |
2a1fe215e audit: use curren... |
1091 |
audit_log_task_info(ab); |
897f1acbb audit: AUDIT_FEAT... |
1092 |
audit_log_format(ab, " feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d", |
b0fed4021 audit: implement ... |
1093 1094 1095 1096 |
audit_feature_names[which], !!old_feature, !!new_feature, !!old_lock, !!new_lock, res); audit_log_end(ab); } |
756125289 audit: always che... |
1097 |
static int audit_set_feature(struct audit_features *uaf) |
b0fed4021 audit: implement ... |
1098 |
{ |
b0fed4021 audit: implement ... |
1099 |
int i; |
6eed9b261 kernel/audit.c: u... |
1100 |
BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names)); |
b0fed4021 audit: implement ... |
1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 |
/* if there is ever a version 2 we should handle that here */ for (i = 0; i <= AUDIT_LAST_FEATURE; i++) { u32 feature = AUDIT_FEATURE_TO_MASK(i); u32 old_feature, new_feature, old_lock, new_lock; /* if we are not changing this feature, move along */ if (!(feature & uaf->mask)) continue; old_feature = af.features & feature; new_feature = uaf->features & feature; new_lock = (uaf->lock | af.lock) & feature; old_lock = af.lock & feature; /* are we changing a locked feature? */ |
4547b3bc4 audit: use old_lo... |
1118 |
if (old_lock && (new_feature != old_feature)) { |
b0fed4021 audit: implement ... |
1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 |
audit_log_feature_change(i, old_feature, new_feature, old_lock, new_lock, 0); return -EPERM; } } /* nothing invalid, do the changes */ for (i = 0; i <= AUDIT_LAST_FEATURE; i++) { u32 feature = AUDIT_FEATURE_TO_MASK(i); u32 old_feature, new_feature, old_lock, new_lock; /* if we are not changing this feature, move along */ if (!(feature & uaf->mask)) continue; old_feature = af.features & feature; new_feature = uaf->features & feature; old_lock = af.lock & feature; new_lock = (uaf->lock | af.lock) & feature; if (new_feature != old_feature) audit_log_feature_change(i, old_feature, new_feature, old_lock, new_lock, 1); if (new_feature) af.features |= feature; else af.features &= ~feature; af.lock |= new_lock; } return 0; } |
b6c7c115c audit: store the ... |
1151 |
static int audit_replace(struct pid *pid) |
133e1e5ac audit: stop an ol... |
1152 |
{ |
b6c7c115c audit: store the ... |
1153 |
pid_t pvnr; |
5b52330bb audit: fix auditd... |
1154 |
struct sk_buff *skb; |
133e1e5ac audit: stop an ol... |
1155 |
|
b6c7c115c audit: store the ... |
1156 1157 |
pvnr = pid_vnr(pid); skb = audit_make_reply(0, AUDIT_REPLACE, 0, 0, &pvnr, sizeof(pvnr)); |
133e1e5ac audit: stop an ol... |
1158 1159 |
if (!skb) return -ENOMEM; |
5b52330bb audit: fix auditd... |
1160 |
return auditd_send_unicast_skb(skb); |
133e1e5ac audit: stop an ol... |
1161 |
} |
1da177e4c Linux-2.6.12-rc2 |
1162 1163 |
static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { |
dc9eb698f audit: stop pushi... |
1164 |
u32 seq; |
1da177e4c Linux-2.6.12-rc2 |
1165 |
void *data; |
756125289 audit: always che... |
1166 |
int data_len; |
1da177e4c Linux-2.6.12-rc2 |
1167 |
int err; |
c04049939 AUDIT: Add messag... |
1168 |
struct audit_buffer *ab; |
1da177e4c Linux-2.6.12-rc2 |
1169 |
u16 msg_type = nlh->nlmsg_type; |
e1396065e [PATCH] collect s... |
1170 |
struct audit_sig_info *sig_data; |
50397bd1e [AUDIT] clean up ... |
1171 |
char *ctx = NULL; |
e1396065e [PATCH] collect s... |
1172 |
u32 len; |
1da177e4c Linux-2.6.12-rc2 |
1173 |
|
c7bdb545d [NETLINK]: Encaps... |
1174 |
err = audit_netlink_ok(skb, msg_type); |
1da177e4c Linux-2.6.12-rc2 |
1175 1176 |
if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
1177 |
seq = nlh->nlmsg_seq; |
c64e66c67 audit: netlink: M... |
1178 |
data = nlmsg_data(nlh); |
756125289 audit: always che... |
1179 |
data_len = nlmsg_len(nlh); |
1da177e4c Linux-2.6.12-rc2 |
1180 1181 |
switch (msg_type) { |
09f883a90 audit: clean up A... |
1182 1183 1184 |
case AUDIT_GET: { struct audit_status s; memset(&s, 0, sizeof(s)); |
b43870c74 audit: report aud... |
1185 1186 |
s.enabled = audit_enabled; s.failure = audit_failure; |
b6c7c115c audit: store the ... |
1187 1188 |
/* NOTE: use pid_vnr() so the PID is relative to the current * namespace */ |
b43870c74 audit: report aud... |
1189 1190 1191 1192 1193 1194 1195 1196 |
s.pid = auditd_pid_vnr(); s.rate_limit = audit_rate_limit; s.backlog_limit = audit_backlog_limit; s.lost = atomic_read(&audit_lost); s.backlog = skb_queue_len(&audit_queue); s.feature_bitmap = AUDIT_FEATURE_BITMAP_ALL; s.backlog_wait_time = audit_backlog_wait_time; s.backlog_wait_time_actual = atomic_read(&audit_backlog_wait_time_actual); |
6f285b19d audit: Send repli... |
1197 |
audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &s, sizeof(s)); |
1da177e4c Linux-2.6.12-rc2 |
1198 |
break; |
09f883a90 audit: clean up A... |
1199 1200 1201 1202 1203 |
} case AUDIT_SET: { struct audit_status s; memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ |
756125289 audit: always che... |
1204 |
memcpy(&s, data, min_t(size_t, sizeof(s), data_len)); |
09f883a90 audit: clean up A... |
1205 1206 |
if (s.mask & AUDIT_STATUS_ENABLED) { err = audit_set_enabled(s.enabled); |
20c6aaa39 [PATCH] Fix the b... |
1207 1208 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
1209 |
} |
09f883a90 audit: clean up A... |
1210 1211 |
if (s.mask & AUDIT_STATUS_FAILURE) { err = audit_set_failure(s.failure); |
20c6aaa39 [PATCH] Fix the b... |
1212 1213 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
1214 |
} |
09f883a90 audit: clean up A... |
1215 |
if (s.mask & AUDIT_STATUS_PID) { |
b6c7c115c audit: store the ... |
1216 1217 1218 1219 1220 1221 1222 |
/* NOTE: we are using the vnr PID functions below * because the s.pid value is relative to the * namespace of the caller; at present this * doesn't matter much since you can really only * run auditd from the initial pid namespace, but * something to keep in mind if this changes */ pid_t new_pid = s.pid; |
5b52330bb audit: fix auditd... |
1223 |
pid_t auditd_pid; |
b6c7c115c audit: store the ... |
1224 |
struct pid *req_pid = task_tgid(current); |
33e8a9078 audit: Allow audi... |
1225 1226 1227 |
/* Sanity check - PID values must match. Setting * pid to 0 is how auditd ends auditing. */ if (new_pid && (new_pid != pid_vnr(req_pid))) |
b6c7c115c audit: store the ... |
1228 |
return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
1229 |
|
5b52330bb audit: fix auditd... |
1230 |
/* test the auditd connection */ |
b6c7c115c audit: store the ... |
1231 |
audit_replace(req_pid); |
5b52330bb audit: fix auditd... |
1232 |
|
48d0e023a audit: fix the RC... |
1233 |
auditd_pid = auditd_pid_vnr(); |
33e8a9078 audit: Allow audi... |
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 |
if (auditd_pid) { /* replacing a healthy auditd is not allowed */ if (new_pid) { audit_log_config_change("audit_pid", new_pid, auditd_pid, 0); return -EEXIST; } /* only current auditd can unregister itself */ if (pid_vnr(req_pid) != auditd_pid) { audit_log_config_change("audit_pid", new_pid, auditd_pid, 0); return -EACCES; } |
935c9e7ff audit: log failed... |
1247 |
} |
5b52330bb audit: fix auditd... |
1248 |
|
533c7b69c audit: use proper... |
1249 |
if (new_pid) { |
5b52330bb audit: fix auditd... |
1250 |
/* register a new auditd connection */ |
48d0e023a audit: fix the RC... |
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 |
err = auditd_set(req_pid, NETLINK_CB(skb).portid, sock_net(NETLINK_CB(skb).sk)); if (audit_enabled != AUDIT_OFF) audit_log_config_change("audit_pid", new_pid, auditd_pid, err ? 0 : 1); if (err) return err; |
5b52330bb audit: fix auditd... |
1261 1262 |
/* try to process any backlog */ wake_up_interruptible(&kauditd_wait); |
48d0e023a audit: fix the RC... |
1263 1264 1265 1266 1267 |
} else { if (audit_enabled != AUDIT_OFF) audit_log_config_change("audit_pid", new_pid, auditd_pid, 1); |
5b52330bb audit: fix auditd... |
1268 |
/* unregister the auditd connection */ |
c81be52a3 audit: fix a race... |
1269 |
auditd_reset(NULL); |
48d0e023a audit: fix the RC... |
1270 |
} |
1da177e4c Linux-2.6.12-rc2 |
1271 |
} |
09f883a90 audit: clean up A... |
1272 1273 |
if (s.mask & AUDIT_STATUS_RATE_LIMIT) { err = audit_set_rate_limit(s.rate_limit); |
20c6aaa39 [PATCH] Fix the b... |
1274 1275 1276 |
if (err < 0) return err; } |
51cc83f02 audit: add audit_... |
1277 |
if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) { |
09f883a90 audit: clean up A... |
1278 |
err = audit_set_backlog_limit(s.backlog_limit); |
51cc83f02 audit: add audit_... |
1279 1280 1281 |
if (err < 0) return err; } |
3f0c5fad8 audit: remove nee... |
1282 1283 1284 |
if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) { if (sizeof(s) > (size_t)nlh->nlmsg_len) return -EINVAL; |
724e7bfcc audit: Remove con... |
1285 |
if (s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME) |
3f0c5fad8 audit: remove nee... |
1286 1287 1288 1289 |
return -EINVAL; err = audit_set_backlog_wait_time(s.backlog_wait_time); if (err < 0) return err; |
51cc83f02 audit: add audit_... |
1290 |
} |
92c82e8a3 audit: add featur... |
1291 1292 1293 1294 1295 1296 |
if (s.mask == AUDIT_STATUS_LOST) { u32 lost = atomic_xchg(&audit_lost, 0); audit_log_config_change("lost", 0, lost, 1); return lost; } |
b43870c74 audit: report aud... |
1297 1298 1299 1300 1301 1302 |
if (s.mask == AUDIT_STATUS_BACKLOG_WAIT_TIME_ACTUAL) { u32 actual = atomic_xchg(&audit_backlog_wait_time_actual, 0); audit_log_config_change("backlog_wait_time_actual", 0, actual, 1); return actual; } |
1da177e4c Linux-2.6.12-rc2 |
1303 |
break; |
09f883a90 audit: clean up A... |
1304 |
} |
b0fed4021 audit: implement ... |
1305 1306 1307 1308 1309 1310 |
case AUDIT_GET_FEATURE: err = audit_get_feature(skb); if (err) return err; break; case AUDIT_SET_FEATURE: |
756125289 audit: always che... |
1311 1312 1313 |
if (data_len < sizeof(struct audit_features)) return -EINVAL; err = audit_set_feature(data); |
b0fed4021 audit: implement ... |
1314 1315 1316 |
if (err) return err; break; |
05474106a AUDIT: Fix AVC_US... |
1317 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
1318 1319 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
4a4cd633b AUDIT: Optimise t... |
1320 1321 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) return 0; |
763dafc52 audit: check the ... |
1322 1323 1324 |
/* exit early if there isn't at least one character to print */ if (data_len < 2) return -EINVAL; |
4a4cd633b AUDIT: Optimise t... |
1325 |
|
86b2efbe3 audit: add fields... |
1326 |
err = audit_filter(msg_type, AUDIT_FILTER_USER); |
724e4fcc8 audit: log on err... |
1327 |
if (err == 1) { /* match or error */ |
756125289 audit: always che... |
1328 |
char *str = data; |
4a4cd633b AUDIT: Optimise t... |
1329 |
err = 0; |
522ed7767 Audit: add TTY in... |
1330 |
if (msg_type == AUDIT_USER_TTY) { |
37282a779 tty: audit: Combi... |
1331 |
err = tty_audit_push(); |
522ed7767 Audit: add TTY in... |
1332 1333 1334 |
if (err) break; } |
626abcd13 audit: add syscal... |
1335 |
audit_log_user_recv_msg(&ab, msg_type); |
756125289 audit: always che... |
1336 1337 1338 |
if (msg_type != AUDIT_USER_TTY) { /* ensure NULL termination */ str[data_len - 1] = '\0'; |
b50eba7e2 audit: format use... |
1339 1340 |
audit_log_format(ab, " msg='%.*s'", AUDIT_MESSAGE_TEXT_MAX, |
756125289 audit: always che... |
1341 1342 |
str); } else { |
f7616102d audit: use data= ... |
1343 |
audit_log_format(ab, " data="); |
756125289 audit: always che... |
1344 1345 1346 |
if (data_len > 0 && str[data_len - 1] == '\0') data_len--; audit_log_n_untrustedstring(ab, str, data_len); |
4a4cd633b AUDIT: Optimise t... |
1347 |
} |
50397bd1e [AUDIT] clean up ... |
1348 |
audit_log_end(ab); |
0f45aa18e AUDIT: Allow filt... |
1349 |
} |
1da177e4c Linux-2.6.12-rc2 |
1350 |
break; |
93315ed6d [PATCH] audit str... |
1351 1352 |
case AUDIT_ADD_RULE: case AUDIT_DEL_RULE: |
756125289 audit: always che... |
1353 |
if (data_len < sizeof(struct audit_rule_data)) |
93315ed6d [PATCH] audit str... |
1354 |
return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
1355 |
if (audit_enabled == AUDIT_LOCKED) { |
626abcd13 audit: add syscal... |
1356 1357 |
audit_log_common_recv_msg(audit_context(), &ab, AUDIT_CONFIG_CHANGE); |
53fc7a01d audit: give a clu... |
1358 1359 1360 1361 |
audit_log_format(ab, " op=%s audit_enabled=%d res=0", msg_type == AUDIT_ADD_RULE ? "add_rule" : "remove_rule", audit_enabled); |
50397bd1e [AUDIT] clean up ... |
1362 |
audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
1363 1364 |
return -EPERM; } |
756125289 audit: always che... |
1365 |
err = audit_rule_change(msg_type, seq, data, data_len); |
1da177e4c Linux-2.6.12-rc2 |
1366 |
break; |
ce0d9f046 audit: refactor a... |
1367 |
case AUDIT_LIST_RULES: |
6f285b19d audit: Send repli... |
1368 |
err = audit_list_rules_send(skb, seq); |
ce0d9f046 audit: refactor a... |
1369 |
break; |
74c3cbe33 [PATCH] audit: wa... |
1370 1371 |
case AUDIT_TRIM: audit_trim_trees(); |
626abcd13 audit: add syscal... |
1372 1373 |
audit_log_common_recv_msg(audit_context(), &ab, AUDIT_CONFIG_CHANGE); |
74c3cbe33 [PATCH] audit: wa... |
1374 1375 1376 1377 1378 1379 |
audit_log_format(ab, " op=trim res=1"); audit_log_end(ab); break; case AUDIT_MAKE_EQUIV: { void *bufp = data; u32 sizes[2]; |
756125289 audit: always che... |
1380 |
size_t msglen = data_len; |
74c3cbe33 [PATCH] audit: wa... |
1381 1382 1383 |
char *old, *new; err = -EINVAL; |
7719e437f [PATCH 2/2] audit... |
1384 |
if (msglen < 2 * sizeof(u32)) |
74c3cbe33 [PATCH] audit: wa... |
1385 1386 1387 |
break; memcpy(sizes, bufp, 2 * sizeof(u32)); bufp += 2 * sizeof(u32); |
7719e437f [PATCH 2/2] audit... |
1388 1389 |
msglen -= 2 * sizeof(u32); old = audit_unpack_string(&bufp, &msglen, sizes[0]); |
74c3cbe33 [PATCH] audit: wa... |
1390 1391 1392 1393 |
if (IS_ERR(old)) { err = PTR_ERR(old); break; } |
7719e437f [PATCH 2/2] audit... |
1394 |
new = audit_unpack_string(&bufp, &msglen, sizes[1]); |
74c3cbe33 [PATCH] audit: wa... |
1395 1396 1397 1398 1399 1400 1401 |
if (IS_ERR(new)) { err = PTR_ERR(new); kfree(old); break; } /* OK, here comes... */ err = audit_tag_tree(old, new); |
626abcd13 audit: add syscal... |
1402 1403 |
audit_log_common_recv_msg(audit_context(), &ab, AUDIT_CONFIG_CHANGE); |
74c3cbe33 [PATCH] audit: wa... |
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 |
audit_log_format(ab, " op=make_equiv old="); audit_log_untrustedstring(ab, old); audit_log_format(ab, " new="); audit_log_untrustedstring(ab, new); audit_log_format(ab, " res=%d", !err); audit_log_end(ab); kfree(old); kfree(new); break; } |
c2f0c7c35 The attached patc... |
1414 |
case AUDIT_SIGNAL_INFO: |
939cbf260 Audit: send signa... |
1415 1416 1417 1418 1419 1420 |
len = 0; if (audit_sig_sid) { err = security_secid_to_secctx(audit_sig_sid, &ctx, &len); if (err) return err; } |
e1396065e [PATCH] collect s... |
1421 1422 |
sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL); if (!sig_data) { |
939cbf260 Audit: send signa... |
1423 1424 |
if (audit_sig_sid) security_release_secctx(ctx, len); |
e1396065e [PATCH] collect s... |
1425 1426 |
return -ENOMEM; } |
cca080d9b userns: Convert a... |
1427 |
sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid); |
e1396065e [PATCH] collect s... |
1428 |
sig_data->pid = audit_sig_pid; |
939cbf260 Audit: send signa... |
1429 1430 1431 1432 |
if (audit_sig_sid) { memcpy(sig_data->ctx, ctx, len); security_release_secctx(ctx, len); } |
6f285b19d audit: Send repli... |
1433 1434 |
audit_send_reply(skb, seq, AUDIT_SIGNAL_INFO, 0, 0, sig_data, sizeof(*sig_data) + len); |
e1396065e [PATCH] collect s... |
1435 |
kfree(sig_data); |
c2f0c7c35 The attached patc... |
1436 |
break; |
522ed7767 Audit: add TTY in... |
1437 1438 |
case AUDIT_TTY_GET: { struct audit_tty_status s; |
2e28d38ae tty: audit: Handl... |
1439 |
unsigned int t; |
8aa14b649 audit: Simply AUD... |
1440 |
|
2e28d38ae tty: audit: Handl... |
1441 1442 1443 |
t = READ_ONCE(current->signal->audit_tty); s.enabled = t & AUDIT_TTY_ENABLE; s.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD); |
8aa14b649 audit: Simply AUD... |
1444 |
|
6f285b19d audit: Send repli... |
1445 |
audit_send_reply(skb, seq, AUDIT_TTY_GET, 0, 0, &s, sizeof(s)); |
522ed7767 Audit: add TTY in... |
1446 1447 1448 |
break; } case AUDIT_TTY_SET: { |
a06e56b2a audit: log AUDIT_... |
1449 |
struct audit_tty_status s, old; |
a06e56b2a audit: log AUDIT_... |
1450 |
struct audit_buffer *ab; |
2e28d38ae tty: audit: Handl... |
1451 |
unsigned int t; |
0e23bacca audit: rework AUD... |
1452 1453 1454 |
memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ |
756125289 audit: always che... |
1455 |
memcpy(&s, data, min_t(size_t, sizeof(s), data_len)); |
0e23bacca audit: rework AUD... |
1456 1457 1458 1459 |
/* check if new data is valid */ if ((s.enabled != 0 && s.enabled != 1) || (s.log_passwd != 0 && s.log_passwd != 1)) err = -EINVAL; |
a06e56b2a audit: log AUDIT_... |
1460 |
|
2e28d38ae tty: audit: Handl... |
1461 1462 1463 1464 1465 |
if (err) t = READ_ONCE(current->signal->audit_tty); else { t = s.enabled | (-s.log_passwd & AUDIT_TTY_LOG_PASSWD); t = xchg(¤t->signal->audit_tty, t); |
0e23bacca audit: rework AUD... |
1466 |
} |
2e28d38ae tty: audit: Handl... |
1467 1468 |
old.enabled = t & AUDIT_TTY_ENABLE; old.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD); |
522ed7767 Audit: add TTY in... |
1469 |
|
626abcd13 audit: add syscal... |
1470 1471 |
audit_log_common_recv_msg(audit_context(), &ab, AUDIT_CONFIG_CHANGE); |
1ce319f11 audit: reorder AU... |
1472 1473 1474 1475 |
audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d" " old-log_passwd=%d new-log_passwd=%d res=%d", old.enabled, s.enabled, old.log_passwd, s.log_passwd, !err); |
a06e56b2a audit: log AUDIT_... |
1476 |
audit_log_end(ab); |
522ed7767 Audit: add TTY in... |
1477 1478 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
1479 1480 1481 1482 1483 1484 1485 |
default: err = -EINVAL; break; } return err < 0 ? err : 0; } |
a9d162087 audit: combine au... |
1486 1487 1488 1489 1490 1491 |
/** * audit_receive - receive messages from a netlink control socket * @skb: the message buffer * * Parse the provided skb and deal with any messages that may be present, * malformed skbs are discarded. |
b0dd25a82 [PATCH] AUDIT: ke... |
1492 |
*/ |
a9d162087 audit: combine au... |
1493 |
static void audit_receive(struct sk_buff *skb) |
1da177e4c Linux-2.6.12-rc2 |
1494 |
{ |
ea7ae60bf Audit: clean up a... |
1495 1496 |
struct nlmsghdr *nlh; /* |
941912133 audit: replace ob... |
1497 |
* len MUST be signed for nlmsg_next to be able to dec it below 0 |
ea7ae60bf Audit: clean up a... |
1498 1499 1500 1501 1502 1503 1504 |
* if the nlmsg_len was not aligned */ int len; int err; nlh = nlmsg_hdr(skb); len = skb->len; |
ce423631c audit: track the ... |
1505 |
audit_ctl_lock(); |
941912133 audit: replace ob... |
1506 |
while (nlmsg_ok(nlh, len)) { |
ea7ae60bf Audit: clean up a... |
1507 1508 1509 |
err = audit_receive_msg(skb, nlh); /* if err or if this message says it wants a response */ if (err || (nlh->nlmsg_flags & NLM_F_ACK)) |
2d4bc9336 netlink: extended... |
1510 |
netlink_ack(skb, nlh, err, NULL); |
ea7ae60bf Audit: clean up a... |
1511 |
|
2851da570 audit: pass int* ... |
1512 |
nlh = nlmsg_next(nlh, &len); |
1da177e4c Linux-2.6.12-rc2 |
1513 |
} |
ce423631c audit: track the ... |
1514 |
audit_ctl_unlock(); |
d978295bb audit: ensure use... |
1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 |
/* can't block with the ctrl lock, so penalize the sender now */ if (audit_backlog_limit && (skb_queue_len(&audit_queue) > audit_backlog_limit)) { DECLARE_WAITQUEUE(wait, current); /* wake kauditd to try and flush the queue */ wake_up_interruptible(&kauditd_wait); add_wait_queue_exclusive(&audit_backlog_wait, &wait); set_current_state(TASK_UNINTERRUPTIBLE); schedule_timeout(audit_backlog_wait_time); remove_wait_queue(&audit_backlog_wait, &wait); } |
1da177e4c Linux-2.6.12-rc2 |
1529 |
} |
9d2161bed audit: log audit ... |
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 |
/* Log information about who is connecting to the audit multicast socket */ static void audit_log_multicast(int group, const char *op, int err) { const struct cred *cred; struct tty_struct *tty; char comm[sizeof(current->comm)]; struct audit_buffer *ab; if (!audit_enabled) return; ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_EVENT_LISTENER); if (!ab) return; cred = current_cred(); tty = audit_get_tty(); audit_log_format(ab, "pid=%u uid=%u auid=%u tty=%s ses=%u", task_pid_nr(current), from_kuid(&init_user_ns, cred->uid), from_kuid(&init_user_ns, audit_get_loginuid(current)), tty ? tty_name(tty) : "(none)", audit_get_sessionid(current)); audit_put_tty(tty); audit_log_task_context(ab); /* subj= */ audit_log_format(ab, " comm="); audit_log_untrustedstring(ab, get_task_comm(comm, current)); audit_log_d_path_exe(ab, current->mm); /* exe= */ audit_log_format(ab, " nl-mcgrp=%d op=%s res=%d", group, op, !err); audit_log_end(ab); } |
3a101b8de audit: add netlin... |
1561 |
/* Run custom bind function on netlink socket group connect or bind requests. */ |
9d2161bed audit: log audit ... |
1562 |
static int audit_multicast_bind(struct net *net, int group) |
3a101b8de audit: add netlin... |
1563 |
{ |
9d2161bed audit: log audit ... |
1564 |
int err = 0; |
3a101b8de audit: add netlin... |
1565 |
if (!capable(CAP_AUDIT_READ)) |
9d2161bed audit: log audit ... |
1566 1567 1568 1569 |
err = -EPERM; audit_log_multicast(group, "connect", err); return err; } |
3a101b8de audit: add netlin... |
1570 |
|
9d2161bed audit: log audit ... |
1571 1572 1573 |
static void audit_multicast_unbind(struct net *net, int group) { audit_log_multicast(group, "disconnect", 0); |
3a101b8de audit: add netlin... |
1574 |
} |
33faba7fa audit: listen in ... |
1575 |
static int __net_init audit_net_init(struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
1576 |
{ |
a31f2d17b netlink: add netl... |
1577 1578 |
struct netlink_kernel_cfg cfg = { .input = audit_receive, |
9d2161bed audit: log audit ... |
1579 1580 |
.bind = audit_multicast_bind, .unbind = audit_multicast_unbind, |
451f92163 audit: add netlin... |
1581 1582 |
.flags = NL_CFG_F_NONROOT_RECV, .groups = AUDIT_NLGRP_MAX, |
a31f2d17b netlink: add netl... |
1583 |
}; |
f368c07d7 [PATCH] audit: pa... |
1584 |
|
33faba7fa audit: listen in ... |
1585 |
struct audit_net *aunet = net_generic(net, audit_net_id); |
5b52330bb audit: fix auditd... |
1586 1587 |
aunet->sk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg); if (aunet->sk == NULL) { |
33faba7fa audit: listen in ... |
1588 |
audit_panic("cannot initialize netlink socket in namespace"); |
11ee39ebf audit: print erro... |
1589 1590 |
return -ENOMEM; } |
a5f4d17da audit: improve ro... |
1591 1592 |
/* limit the timeout in case auditd is blocked/stopped */ aunet->sk->sk_sndtimeo = HZ / 10; |
5b52330bb audit: fix auditd... |
1593 |
|
33faba7fa audit: listen in ... |
1594 1595 1596 1597 1598 1599 |
return 0; } static void __net_exit audit_net_exit(struct net *net) { struct audit_net *aunet = net_generic(net, audit_net_id); |
5b52330bb audit: fix auditd... |
1600 |
|
48d0e023a audit: fix the RC... |
1601 1602 1603 1604 1605 |
/* NOTE: you would think that we would want to check the auditd * connection and potentially reset it here if it lives in this * namespace, but since the auditd connection tracking struct holds a * reference to this namespace (see auditd_set()) we are only ever * going to get here after that connection has been released */ |
33faba7fa audit: listen in ... |
1606 |
|
5b52330bb audit: fix auditd... |
1607 |
netlink_kernel_release(aunet->sk); |
33faba7fa audit: listen in ... |
1608 |
} |
8626877b5 audit: fix locati... |
1609 |
static struct pernet_operations audit_net_ops __net_initdata = { |
33faba7fa audit: listen in ... |
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 |
.init = audit_net_init, .exit = audit_net_exit, .id = &audit_net_id, .size = sizeof(struct audit_net), }; /* Initialize audit support at boot time. */ static int __init audit_init(void) { int i; |
a3f07114e [PATCH] Audit: ma... |
1620 1621 |
if (audit_initialized == AUDIT_DISABLED) return 0; |
8cc96382d audit: use kmem_c... |
1622 1623 1624 |
audit_buffer_cache = kmem_cache_create("audit_buffer", sizeof(struct audit_buffer), 0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1625 |
|
af8b824f2 audit: rename the... |
1626 |
skb_queue_head_init(&audit_queue); |
c6480207f audit: rework the... |
1627 |
skb_queue_head_init(&audit_retry_queue); |
af8b824f2 audit: rename the... |
1628 |
skb_queue_head_init(&audit_hold_queue); |
3dc7e3153 [PATCH] support f... |
1629 |
|
f368c07d7 [PATCH] audit: pa... |
1630 1631 |
for (i = 0; i < AUDIT_INODE_BUCKETS; i++) INIT_LIST_HEAD(&audit_inode_hash[i]); |
f368c07d7 [PATCH] audit: pa... |
1632 |
|
ce423631c audit: track the ... |
1633 1634 |
mutex_init(&audit_cmd_mutex.lock); audit_cmd_mutex.owner = NULL; |
5b52330bb audit: fix auditd... |
1635 1636 1637 1638 1639 1640 |
pr_info("initializing netlink subsys (%s) ", audit_default ? "enabled" : "disabled"); register_pernet_subsys(&audit_net_ops); audit_initialized = AUDIT_INITIALIZED; |
5b52330bb audit: fix auditd... |
1641 |
|
6c9255645 audit: fixup audi... |
1642 1643 1644 1645 1646 1647 |
kauditd_task = kthread_run(kauditd_thread, NULL, "kauditd"); if (IS_ERR(kauditd_task)) { int err = PTR_ERR(kauditd_task); panic("audit: failed to start the kauditd thread (%d) ", err); } |
7c397d01e audit: Make AUDIT... |
1648 1649 1650 |
audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "state=initialized audit_enabled=%u res=1", audit_enabled); |
6c9255645 audit: fixup audi... |
1651 |
|
1da177e4c Linux-2.6.12-rc2 |
1652 1653 |
return 0; } |
be4104abf audit: initialize... |
1654 |
postcore_initcall(audit_init); |
1da177e4c Linux-2.6.12-rc2 |
1655 |
|
11dd26663 audit: do not pan... |
1656 1657 1658 1659 |
/* * Process kernel command-line parameter at boot time. * audit={0|off} or audit={1|on}. */ |
1da177e4c Linux-2.6.12-rc2 |
1660 1661 |
static int __init audit_enable(char *str) { |
11dd26663 audit: do not pan... |
1662 1663 1664 1665 1666 1667 1668 1669 1670 |
if (!strcasecmp(str, "off") || !strcmp(str, "0")) audit_default = AUDIT_OFF; else if (!strcasecmp(str, "on") || !strcmp(str, "1")) audit_default = AUDIT_ON; else { pr_err("audit: invalid 'audit' parameter value (%s) ", str); audit_default = AUDIT_ON; } |
80ab4df62 audit: don't use ... |
1671 1672 |
if (audit_default == AUDIT_OFF) |
a3f07114e [PATCH] Audit: ma... |
1673 |
audit_initialized = AUDIT_DISABLED; |
5d842a5b7 audit: use audit_... |
1674 |
if (audit_set_enabled(audit_default)) |
11dd26663 audit: do not pan... |
1675 1676 1677 |
pr_err("audit: error setting audit state (%d) ", audit_default); |
a3f07114e [PATCH] Audit: ma... |
1678 |
|
d957f7b72 audit: Use more c... |
1679 1680 |
pr_info("%s ", audit_default ? |
d3ca0344b audit: remove use... |
1681 |
"enabled (after initialization)" : "disabled (until reboot)"); |
a3f07114e [PATCH] Audit: ma... |
1682 |
|
9b41046cd [PATCH] Don't pas... |
1683 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
1684 |
} |
1da177e4c Linux-2.6.12-rc2 |
1685 |
__setup("audit=", audit_enable); |
f910fde73 audit: add kernel... |
1686 1687 1688 1689 |
/* Process kernel command-line parameter at boot time. * audit_backlog_limit=<n> */ static int __init audit_backlog_limit_set(char *str) { |
3e1d0bb62 audit: Convert in... |
1690 |
u32 audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1691 |
|
f910fde73 audit: add kernel... |
1692 |
pr_info("audit_backlog_limit: "); |
3e1d0bb62 audit: Convert in... |
1693 1694 1695 |
if (kstrtouint(str, 0, &audit_backlog_limit_arg)) { pr_cont("using default of %u, unable to parse %s ", |
d957f7b72 audit: Use more c... |
1696 |
audit_backlog_limit, str); |
f910fde73 audit: add kernel... |
1697 1698 |
return 1; } |
3e1d0bb62 audit: Convert in... |
1699 1700 |
audit_backlog_limit = audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1701 1702 |
pr_cont("%d ", audit_backlog_limit); |
f910fde73 audit: add kernel... |
1703 1704 1705 1706 |
return 1; } __setup("audit_backlog_limit=", audit_backlog_limit_set); |
16e1904e6 AUDIT: Add helper... |
1707 1708 |
static void audit_buffer_free(struct audit_buffer *ab) { |
8fc6115c2 AUDIT: expand aud... |
1709 1710 |
if (!ab) return; |
d865e573b audit: Delete unn... |
1711 |
kfree_skb(ab->skb); |
8cc96382d audit: use kmem_c... |
1712 |
kmem_cache_free(audit_buffer_cache, ab); |
16e1904e6 AUDIT: Add helper... |
1713 |
} |
8cc96382d audit: use kmem_c... |
1714 1715 |
static struct audit_buffer *audit_buffer_alloc(struct audit_context *ctx, gfp_t gfp_mask, int type) |
16e1904e6 AUDIT: Add helper... |
1716 |
{ |
8cc96382d audit: use kmem_c... |
1717 |
struct audit_buffer *ab; |
8fc6115c2 AUDIT: expand aud... |
1718 |
|
8cc96382d audit: use kmem_c... |
1719 1720 1721 |
ab = kmem_cache_alloc(audit_buffer_cache, gfp_mask); if (!ab) return NULL; |
ee080e6ce Audit: cleanup ne... |
1722 1723 1724 |
ab->skb = nlmsg_new(AUDIT_BUFSIZ, gfp_mask); if (!ab->skb) |
c64e66c67 audit: netlink: M... |
1725 |
goto err; |
8cc96382d audit: use kmem_c... |
1726 1727 |
if (!nlmsg_put(ab->skb, 0, 0, type, 0, 0)) goto err; |
ee080e6ce Audit: cleanup ne... |
1728 |
|
8cc96382d audit: use kmem_c... |
1729 1730 |
ab->ctx = ctx; ab->gfp_mask = gfp_mask; |
ee080e6ce Audit: cleanup ne... |
1731 |
|
16e1904e6 AUDIT: Add helper... |
1732 |
return ab; |
ee080e6ce Audit: cleanup ne... |
1733 |
|
8fc6115c2 AUDIT: expand aud... |
1734 1735 1736 |
err: audit_buffer_free(ab); return NULL; |
16e1904e6 AUDIT: Add helper... |
1737 |
} |
1da177e4c Linux-2.6.12-rc2 |
1738 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1739 1740 1741 1742 |
/** * audit_serial - compute a serial number for the audit record * * Compute a serial number for the audit record. Audit records are |
bfb4496e7 AUDIT: Assign ser... |
1743 1744 1745 1746 1747 1748 1749 |
* written to user-space as soon as they are generated, so a complete * audit record may be written in several pieces. The timestamp of the * record and this serial number are used by the user-space tools to * determine which pieces belong to the same audit record. The * (timestamp,serial) tuple is unique for each syscall and is live from * syscall entry to syscall exit. * |
bfb4496e7 AUDIT: Assign ser... |
1750 1751 1752 1753 |
* NOTE: Another possibility is to store the formatted records off the * audit context (for those records that have a context), and emit them * all at syscall exit. However, this could delay the reporting of * significant errors until syscall exit (or never, if the system |
b0dd25a82 [PATCH] AUDIT: ke... |
1754 1755 |
* halts). */ |
bfb4496e7 AUDIT: Assign ser... |
1756 1757 |
unsigned int audit_serial(void) { |
01478d7d6 audit: use atomic... |
1758 |
static atomic_t serial = ATOMIC_INIT(0); |
d5b454f2c AUDIT: Fix livelo... |
1759 |
|
6b3211842 audit: replace at... |
1760 |
return atomic_inc_return(&serial); |
bfb4496e7 AUDIT: Assign ser... |
1761 |
} |
5600b8927 whitespace fixes:... |
1762 |
static inline void audit_get_stamp(struct audit_context *ctx, |
2115bb250 audit: Use timesp... |
1763 |
struct timespec64 *t, unsigned int *serial) |
bfb4496e7 AUDIT: Assign ser... |
1764 |
{ |
48887e63d [PATCH] fix broke... |
1765 |
if (!ctx || !auditsc_get_stamp(ctx, t, serial)) { |
290e44b7d audit: use ktime_... |
1766 |
ktime_get_coarse_real_ts64(t); |
bfb4496e7 AUDIT: Assign ser... |
1767 1768 1769 |
*serial = audit_serial(); } } |
b0dd25a82 [PATCH] AUDIT: ke... |
1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 |
/** * audit_log_start - obtain an audit buffer * @ctx: audit_context (may be NULL) * @gfp_mask: type of allocation * @type: audit message type * * Returns audit_buffer pointer on success or NULL on error. * * Obtain an audit buffer. This routine does locking to obtain the * audit buffer, but then no locking is required for calls to * audit_log_*format. If the task (ctx) is a task that is currently in a * syscall, then the syscall is marked as auditable and an audit record * will be written at syscall exit. If there is no associated task, then * task context (ctx) should be NULL. */ |
9796fdd82 [PATCH] gfp_t: ke... |
1785 |
struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, |
9ad9ad385 AUDIT: Wait for b... |
1786 |
int type) |
1da177e4c Linux-2.6.12-rc2 |
1787 |
{ |
319754248 audit: rework aud... |
1788 |
struct audit_buffer *ab; |
2115bb250 audit: Use timesp... |
1789 |
struct timespec64 t; |
3f649ab72 treewide: Remove ... |
1790 |
unsigned int serial; |
1da177e4c Linux-2.6.12-rc2 |
1791 |
|
a3f07114e [PATCH] Audit: ma... |
1792 |
if (audit_initialized != AUDIT_INITIALIZED) |
1da177e4c Linux-2.6.12-rc2 |
1793 |
return NULL; |
d904ac032 audit: rename FIL... |
1794 |
if (unlikely(!audit_filter(type, AUDIT_FILTER_EXCLUDE))) |
c8edc80c8 [PATCH] Exclude m... |
1795 |
return NULL; |
5b52330bb audit: fix auditd... |
1796 |
/* NOTE: don't ever fail/sleep on these two conditions: |
a09cfa470 audit: don't ever... |
1797 1798 1799 1800 |
* 1. auditd generated record - since we need auditd to drain the * queue; also, when we are checking for auditd, compare PIDs using * task_tgid_vnr() since auditd_pid is set in audit_receive_msg() * using a PID anchored in the caller's namespace |
5b52330bb audit: fix auditd... |
1801 |
* 2. generator holding the audit_cmd_mutex - we don't want to block |
d978295bb audit: ensure use... |
1802 1803 1804 |
* while holding the mutex, although we do penalize the sender * later in audit_receive() when it is safe to block */ |
ce423631c audit: track the ... |
1805 |
if (!(auditd_test_task(current) || audit_ctl_owner_current())) { |
5b52330bb audit: fix auditd... |
1806 |
long stime = audit_backlog_wait_time; |
319754248 audit: rework aud... |
1807 1808 1809 1810 1811 |
while (audit_backlog_limit && (skb_queue_len(&audit_queue) > audit_backlog_limit)) { /* wake kauditd to try and flush the queue */ wake_up_interruptible(&kauditd_wait); |
9ad9ad385 AUDIT: Wait for b... |
1812 |
|
319754248 audit: rework aud... |
1813 1814 |
/* sleep if we are allowed and we haven't exhausted our * backlog wait limit */ |
5b52330bb audit: fix auditd... |
1815 |
if (gfpflags_allow_blocking(gfp_mask) && (stime > 0)) { |
b43870c74 audit: report aud... |
1816 |
long rtime = stime; |
319754248 audit: rework aud... |
1817 1818 1819 1820 1821 |
DECLARE_WAITQUEUE(wait, current); add_wait_queue_exclusive(&audit_backlog_wait, &wait); set_current_state(TASK_UNINTERRUPTIBLE); |
b43870c74 audit: report aud... |
1822 1823 |
stime = schedule_timeout(rtime); atomic_add(rtime - stime, &audit_backlog_wait_time_actual); |
319754248 audit: rework aud... |
1824 1825 1826 1827 1828 1829 1830 1831 1832 |
remove_wait_queue(&audit_backlog_wait, &wait); } else { if (audit_rate_check() && printk_ratelimit()) pr_warn("audit_backlog=%d > audit_backlog_limit=%d ", skb_queue_len(&audit_queue), audit_backlog_limit); audit_log_lost("backlog limit exceeded"); return NULL; |
8ac1c8d5d audit: fix endles... |
1833 |
} |
9ad9ad385 AUDIT: Wait for b... |
1834 |
} |
fb19b4c6a AUDIT: Honour aud... |
1835 |
} |
9ad9ad385 AUDIT: Wait for b... |
1836 |
ab = audit_buffer_alloc(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
1837 1838 1839 1840 |
if (!ab) { audit_log_lost("out of memory in audit_log_start"); return NULL; } |
bfb4496e7 AUDIT: Assign ser... |
1841 |
audit_get_stamp(ab->ctx, &t, &serial); |
6d915476e audit: trigger ac... |
1842 1843 1844 |
/* cancel dummy context to enable supporting records */ if (ctx) ctx->dummy = 0; |
2115bb250 audit: Use timesp... |
1845 1846 |
audit_log_format(ab, "audit(%llu.%03lu:%u): ", (unsigned long long)t.tv_sec, t.tv_nsec/1000000, serial); |
319754248 audit: rework aud... |
1847 |
|
1da177e4c Linux-2.6.12-rc2 |
1848 1849 |
return ab; } |
8fc6115c2 AUDIT: expand aud... |
1850 |
/** |
5ac52f33b AUDIT: buffer aud... |
1851 |
* audit_expand - expand skb in the audit buffer |
8fc6115c2 AUDIT: expand aud... |
1852 |
* @ab: audit_buffer |
b0dd25a82 [PATCH] AUDIT: ke... |
1853 |
* @extra: space to add at tail of the skb |
8fc6115c2 AUDIT: expand aud... |
1854 1855 1856 1857 |
* * Returns 0 (no space) on failed expansion, or available space if * successful. */ |
e3b926b4c AUDIT: pass size ... |
1858 |
static inline int audit_expand(struct audit_buffer *ab, int extra) |
8fc6115c2 AUDIT: expand aud... |
1859 |
{ |
5ac52f33b AUDIT: buffer aud... |
1860 |
struct sk_buff *skb = ab->skb; |
406a1d868 [AUDIT]: Increase... |
1861 1862 1863 |
int oldtail = skb_tailroom(skb); int ret = pskb_expand_head(skb, 0, extra, ab->gfp_mask); int newtail = skb_tailroom(skb); |
5ac52f33b AUDIT: buffer aud... |
1864 1865 |
if (ret < 0) { audit_log_lost("out of memory in audit_expand"); |
8fc6115c2 AUDIT: expand aud... |
1866 |
return 0; |
5ac52f33b AUDIT: buffer aud... |
1867 |
} |
406a1d868 [AUDIT]: Increase... |
1868 1869 1870 |
skb->truesize += newtail - oldtail; return newtail; |
8fc6115c2 AUDIT: expand aud... |
1871 |
} |
1da177e4c Linux-2.6.12-rc2 |
1872 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1873 1874 |
/* * Format an audit message into the audit buffer. If there isn't enough |
1da177e4c Linux-2.6.12-rc2 |
1875 1876 |
* room in the audit buffer, more room will be allocated and vsnprint * will be called a second time. Currently, we assume that a printk |
b0dd25a82 [PATCH] AUDIT: ke... |
1877 1878 |
* can't format message larger than 1024 bytes, so we don't either. */ |
1da177e4c Linux-2.6.12-rc2 |
1879 1880 1881 1882 |
static void audit_log_vformat(struct audit_buffer *ab, const char *fmt, va_list args) { int len, avail; |
5ac52f33b AUDIT: buffer aud... |
1883 |
struct sk_buff *skb; |
eecb0a733 AUDIT: Fix abuse ... |
1884 |
va_list args2; |
1da177e4c Linux-2.6.12-rc2 |
1885 1886 1887 |
if (!ab) return; |
5ac52f33b AUDIT: buffer aud... |
1888 1889 1890 1891 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); if (avail == 0) { |
e3b926b4c AUDIT: pass size ... |
1892 |
avail = audit_expand(ab, AUDIT_BUFSIZ); |
8fc6115c2 AUDIT: expand aud... |
1893 1894 |
if (!avail) goto out; |
1da177e4c Linux-2.6.12-rc2 |
1895 |
} |
eecb0a733 AUDIT: Fix abuse ... |
1896 |
va_copy(args2, args); |
27a884dc3 [SK_BUFF]: Conver... |
1897 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1898 1899 1900 1901 |
if (len >= avail) { /* The printk buffer is 1024 bytes long, so if we get * here and AUDIT_BUFSIZ is at least 1024, then we can * log everything that printk could have logged. */ |
b0dd25a82 [PATCH] AUDIT: ke... |
1902 1903 |
avail = audit_expand(ab, max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail)); |
8fc6115c2 AUDIT: expand aud... |
1904 |
if (!avail) |
a0e86bd42 audit: always fol... |
1905 |
goto out_va_end; |
27a884dc3 [SK_BUFF]: Conver... |
1906 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2); |
1da177e4c Linux-2.6.12-rc2 |
1907 |
} |
168b71739 AUDIT: Clean up l... |
1908 1909 |
if (len > 0) skb_put(skb, len); |
a0e86bd42 audit: always fol... |
1910 1911 |
out_va_end: va_end(args2); |
8fc6115c2 AUDIT: expand aud... |
1912 1913 |
out: return; |
1da177e4c Linux-2.6.12-rc2 |
1914 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
1915 1916 1917 1918 1919 1920 1921 1922 |
/** * audit_log_format - format a message into the audit buffer. * @ab: audit_buffer * @fmt: format string * @...: optional parameters matching @fmt string * * All the work is done in audit_log_vformat. */ |
1da177e4c Linux-2.6.12-rc2 |
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 |
void audit_log_format(struct audit_buffer *ab, const char *fmt, ...) { va_list args; if (!ab) return; va_start(args, fmt); audit_log_vformat(ab, fmt, args); va_end(args); } |
b0dd25a82 [PATCH] AUDIT: ke... |
1933 |
/** |
196a50855 audit: update the... |
1934 |
* audit_log_n_hex - convert a buffer to hex and append it to the audit skb |
b0dd25a82 [PATCH] AUDIT: ke... |
1935 1936 1937 1938 1939 1940 1941 1942 1943 |
* @ab: the audit_buffer * @buf: buffer to convert to hex * @len: length of @buf to be converted * * No return value; failure to expand is silently ignored. * * This function will take the passed buf and convert it into a string of * ascii hex digits. The new string is placed onto the skb. */ |
b556f8ad5 Audit: standardiz... |
1944 |
void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf, |
168b71739 AUDIT: Clean up l... |
1945 |
size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1946 |
{ |
168b71739 AUDIT: Clean up l... |
1947 1948 1949 |
int i, avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
168b71739 AUDIT: Clean up l... |
1950 |
|
8ef2d3040 [PATCH] sanity ch... |
1951 1952 |
if (!ab) return; |
168b71739 AUDIT: Clean up l... |
1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); new_len = len<<1; if (new_len >= avail) { /* Round the buffer request up to the next multiple */ new_len = AUDIT_BUFSIZ*(((new_len-avail)/AUDIT_BUFSIZ) + 1); avail = audit_expand(ab, new_len); if (!avail) return; } |
83c7d0917 AUDIT: Avoid log ... |
1964 |
|
27a884dc3 [SK_BUFF]: Conver... |
1965 |
ptr = skb_tail_pointer(skb); |
b8dbc3241 audit: Use hex_by... |
1966 1967 |
for (i = 0; i < len; i++) ptr = hex_byte_pack_upper(ptr, buf[i]); |
168b71739 AUDIT: Clean up l... |
1968 1969 |
*ptr = 0; skb_put(skb, len << 1); /* new string is twice the old string */ |
83c7d0917 AUDIT: Avoid log ... |
1970 |
} |
9c937dcc7 [PATCH] log more ... |
1971 1972 1973 1974 |
/* * Format a string of no more than slen characters into the audit buffer, * enclosed in quote marks. */ |
b556f8ad5 Audit: standardiz... |
1975 1976 |
void audit_log_n_string(struct audit_buffer *ab, const char *string, size_t slen) |
9c937dcc7 [PATCH] log more ... |
1977 1978 1979 1980 |
{ int avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
8ef2d3040 [PATCH] sanity ch... |
1981 1982 |
if (!ab) return; |
9c937dcc7 [PATCH] log more ... |
1983 1984 1985 1986 1987 1988 1989 1990 1991 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); new_len = slen + 3; /* enclosing quotes + null terminator */ if (new_len > avail) { avail = audit_expand(ab, new_len); if (!avail) return; } |
27a884dc3 [SK_BUFF]: Conver... |
1992 |
ptr = skb_tail_pointer(skb); |
9c937dcc7 [PATCH] log more ... |
1993 1994 1995 1996 1997 1998 1999 |
*ptr++ = '"'; memcpy(ptr, string, slen); ptr += slen; *ptr++ = '"'; *ptr = 0; skb_put(skb, slen + 2); /* don't include null terminator */ } |
b0dd25a82 [PATCH] AUDIT: ke... |
2000 |
/** |
de6bbd1d3 [AUDIT] break lar... |
2001 |
* audit_string_contains_control - does a string need to be logged in hex |
f706d5d22 audit: silence tw... |
2002 2003 |
* @string: string to be checked * @len: max length of the string to check |
de6bbd1d3 [AUDIT] break lar... |
2004 |
*/ |
9fcf836b2 audit: audit_stri... |
2005 |
bool audit_string_contains_control(const char *string, size_t len) |
de6bbd1d3 [AUDIT] break lar... |
2006 2007 |
{ const unsigned char *p; |
b3897f567 Audit: fix handli... |
2008 |
for (p = string; p < (const unsigned char *)string + len; p++) { |
1d6c9649e kernel/audit.c co... |
2009 |
if (*p == '"' || *p < 0x21 || *p > 0x7e) |
9fcf836b2 audit: audit_stri... |
2010 |
return true; |
de6bbd1d3 [AUDIT] break lar... |
2011 |
} |
9fcf836b2 audit: audit_stri... |
2012 |
return false; |
de6bbd1d3 [AUDIT] break lar... |
2013 2014 2015 |
} /** |
522ed7767 Audit: add TTY in... |
2016 |
* audit_log_n_untrustedstring - log a string that may contain random characters |
b0dd25a82 [PATCH] AUDIT: ke... |
2017 |
* @ab: audit_buffer |
f706d5d22 audit: silence tw... |
2018 |
* @len: length of string (not including trailing null) |
b0dd25a82 [PATCH] AUDIT: ke... |
2019 2020 2021 2022 |
* @string: string to be logged * * This code will escape a string that is passed to it if the string * contains a control character, unprintable character, double quote mark, |
168b71739 AUDIT: Clean up l... |
2023 |
* or a space. Unescaped strings will start and end with a double quote mark. |
b0dd25a82 [PATCH] AUDIT: ke... |
2024 |
* Strings that are escaped are printed in hex (2 digits per char). |
9c937dcc7 [PATCH] log more ... |
2025 2026 2027 |
* * The caller specifies the number of characters in the string to log, which may * or may not be the entire string. |
b0dd25a82 [PATCH] AUDIT: ke... |
2028 |
*/ |
b556f8ad5 Audit: standardiz... |
2029 2030 |
void audit_log_n_untrustedstring(struct audit_buffer *ab, const char *string, size_t len) |
83c7d0917 AUDIT: Avoid log ... |
2031 |
{ |
de6bbd1d3 [AUDIT] break lar... |
2032 |
if (audit_string_contains_control(string, len)) |
b556f8ad5 Audit: standardiz... |
2033 |
audit_log_n_hex(ab, string, len); |
de6bbd1d3 [AUDIT] break lar... |
2034 |
else |
b556f8ad5 Audit: standardiz... |
2035 |
audit_log_n_string(ab, string, len); |
83c7d0917 AUDIT: Avoid log ... |
2036 |
} |
9c937dcc7 [PATCH] log more ... |
2037 |
/** |
522ed7767 Audit: add TTY in... |
2038 |
* audit_log_untrustedstring - log a string that may contain random characters |
9c937dcc7 [PATCH] log more ... |
2039 2040 2041 |
* @ab: audit_buffer * @string: string to be logged * |
522ed7767 Audit: add TTY in... |
2042 |
* Same as audit_log_n_untrustedstring(), except that strlen is used to |
9c937dcc7 [PATCH] log more ... |
2043 2044 |
* determine string length. */ |
de6bbd1d3 [AUDIT] break lar... |
2045 |
void audit_log_untrustedstring(struct audit_buffer *ab, const char *string) |
9c937dcc7 [PATCH] log more ... |
2046 |
{ |
b556f8ad5 Audit: standardiz... |
2047 |
audit_log_n_untrustedstring(ab, string, strlen(string)); |
9c937dcc7 [PATCH] log more ... |
2048 |
} |
168b71739 AUDIT: Clean up l... |
2049 |
/* This is a helper-function to print the escaped d_path */ |
1da177e4c Linux-2.6.12-rc2 |
2050 |
void audit_log_d_path(struct audit_buffer *ab, const char *prefix, |
66b3fad3f constify path arg... |
2051 |
const struct path *path) |
1da177e4c Linux-2.6.12-rc2 |
2052 |
{ |
44707fdf5 d_path: Use struc... |
2053 |
char *p, *pathname; |
1da177e4c Linux-2.6.12-rc2 |
2054 |
|
8fc6115c2 AUDIT: expand aud... |
2055 |
if (prefix) |
c158a35c8 audit: no leading... |
2056 |
audit_log_format(ab, "%s", prefix); |
1da177e4c Linux-2.6.12-rc2 |
2057 |
|
168b71739 AUDIT: Clean up l... |
2058 |
/* We will allow 11 spaces for ' (deleted)' to be appended */ |
44707fdf5 d_path: Use struc... |
2059 2060 |
pathname = kmalloc(PATH_MAX+11, ab->gfp_mask); if (!pathname) { |
f1d9b23ca audit: purge audi... |
2061 |
audit_log_format(ab, "\"<no_memory>\""); |
168b71739 AUDIT: Clean up l... |
2062 |
return; |
1da177e4c Linux-2.6.12-rc2 |
2063 |
} |
cf28b4863 d_path: Make d_pa... |
2064 |
p = d_path(path, pathname, PATH_MAX+11); |
168b71739 AUDIT: Clean up l... |
2065 2066 |
if (IS_ERR(p)) { /* Should never happen since we send PATH_MAX */ /* FIXME: can we save some information here? */ |
f1d9b23ca audit: purge audi... |
2067 |
audit_log_format(ab, "\"<too_long>\""); |
5600b8927 whitespace fixes:... |
2068 |
} else |
168b71739 AUDIT: Clean up l... |
2069 |
audit_log_untrustedstring(ab, p); |
44707fdf5 d_path: Use struc... |
2070 |
kfree(pathname); |
1da177e4c Linux-2.6.12-rc2 |
2071 |
} |
4d3fb709b helper for some s... |
2072 2073 |
void audit_log_session_info(struct audit_buffer *ab) { |
4440e8548 audit: convert al... |
2074 |
unsigned int sessionid = audit_get_sessionid(current); |
4d3fb709b helper for some s... |
2075 |
uid_t auid = from_kuid(&init_user_ns, audit_get_loginuid(current)); |
a2c97da11 audit: use sessio... |
2076 |
audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); |
4d3fb709b helper for some s... |
2077 |
} |
9d9609851 Audit: clean up a... |
2078 2079 2080 2081 2082 2083 2084 2085 |
void audit_log_key(struct audit_buffer *ab, char *key) { audit_log_format(ab, " key="); if (key) audit_log_untrustedstring(ab, key); else audit_log_format(ab, "(null)"); } |
b24a30a73 audit: fix event ... |
2086 2087 2088 2089 2090 2091 |
int audit_log_task_context(struct audit_buffer *ab) { char *ctx = NULL; unsigned len; int error; u32 sid; |
4ebd7651b lsm: separate sec... |
2092 |
security_task_getsecid_subj(current, &sid); |
b24a30a73 audit: fix event ... |
2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 |
if (!sid) return 0; error = security_secid_to_secctx(sid, &ctx, &len); if (error) { if (error != -EINVAL) goto error_path; return 0; } audit_log_format(ab, " subj=%s", ctx); security_release_secctx(ctx, len); return 0; error_path: audit_panic("error in audit_log_task_context"); return error; } EXPORT_SYMBOL(audit_log_task_context); |
4766b199e audit: consolidat... |
2112 2113 2114 |
void audit_log_d_path_exe(struct audit_buffer *ab, struct mm_struct *mm) { |
5b2825527 audit: reduce mma... |
2115 2116 2117 2118 |
struct file *exe_file; if (!mm) goto out_null; |
4766b199e audit: consolidat... |
2119 |
|
5b2825527 audit: reduce mma... |
2120 2121 2122 2123 2124 2125 2126 2127 2128 |
exe_file = get_mm_exe_file(mm); if (!exe_file) goto out_null; audit_log_d_path(ab, " exe=", &exe_file->f_path); fput(exe_file); return; out_null: audit_log_format(ab, " exe=(null)"); |
4766b199e audit: consolidat... |
2129 |
} |
2a1fe215e audit: use curren... |
2130 |
struct tty_struct *audit_get_tty(void) |
3f5be2da8 audit: move audit... |
2131 2132 2133 |
{ struct tty_struct *tty = NULL; unsigned long flags; |
2a1fe215e audit: use curren... |
2134 2135 2136 2137 |
spin_lock_irqsave(¤t->sighand->siglock, flags); if (current->signal) tty = tty_kref_get(current->signal->tty); spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
3f5be2da8 audit: move audit... |
2138 2139 2140 2141 2142 2143 2144 |
return tty; } void audit_put_tty(struct tty_struct *tty) { tty_kref_put(tty); } |
2a1fe215e audit: use curren... |
2145 |
void audit_log_task_info(struct audit_buffer *ab) |
b24a30a73 audit: fix event ... |
2146 2147 |
{ const struct cred *cred; |
2a1fe215e audit: use curren... |
2148 |
char comm[sizeof(current->comm)]; |
db0a6fb5d audit: add tty fi... |
2149 |
struct tty_struct *tty; |
b24a30a73 audit: fix event ... |
2150 2151 2152 |
if (!ab) return; |
b24a30a73 audit: fix event ... |
2153 |
cred = current_cred(); |
2a1fe215e audit: use curren... |
2154 |
tty = audit_get_tty(); |
b24a30a73 audit: fix event ... |
2155 |
audit_log_format(ab, |
c92cdeb45 audit: convert PP... |
2156 |
" ppid=%d pid=%d auid=%u uid=%u gid=%u" |
b24a30a73 audit: fix event ... |
2157 |
" euid=%u suid=%u fsuid=%u" |
2f2ad1013 audit: restore or... |
2158 |
" egid=%u sgid=%u fsgid=%u tty=%s ses=%u", |
2a1fe215e audit: use curren... |
2159 2160 2161 |
task_ppid_nr(current), task_tgid_nr(current), from_kuid(&init_user_ns, audit_get_loginuid(current)), |
b24a30a73 audit: fix event ... |
2162 2163 2164 2165 2166 2167 2168 2169 |
from_kuid(&init_user_ns, cred->uid), from_kgid(&init_user_ns, cred->gid), from_kuid(&init_user_ns, cred->euid), from_kuid(&init_user_ns, cred->suid), from_kuid(&init_user_ns, cred->fsuid), from_kgid(&init_user_ns, cred->egid), from_kgid(&init_user_ns, cred->sgid), from_kgid(&init_user_ns, cred->fsgid), |
db0a6fb5d audit: add tty fi... |
2170 |
tty ? tty_name(tty) : "(none)", |
2a1fe215e audit: use curren... |
2171 |
audit_get_sessionid(current)); |
db0a6fb5d audit: add tty fi... |
2172 |
audit_put_tty(tty); |
b24a30a73 audit: fix event ... |
2173 |
audit_log_format(ab, " comm="); |
2a1fe215e audit: use curren... |
2174 2175 |
audit_log_untrustedstring(ab, get_task_comm(comm, current)); audit_log_d_path_exe(ab, current->mm); |
b24a30a73 audit: fix event ... |
2176 2177 2178 |
audit_log_task_context(ab); } EXPORT_SYMBOL(audit_log_task_info); |
b0dd25a82 [PATCH] AUDIT: ke... |
2179 |
/** |
245d73698 audit: Report sus... |
2180 2181 2182 |
* audit_log_path_denied - report a path restriction denial * @type: audit message type (AUDIT_ANOM_LINK, AUDIT_ANOM_CREAT, etc) * @operation: specific operation name |
a51d9eaa4 fs: add link rest... |
2183 |
*/ |
245d73698 audit: Report sus... |
2184 |
void audit_log_path_denied(int type, const char *operation) |
a51d9eaa4 fs: add link rest... |
2185 2186 |
{ struct audit_buffer *ab; |
b24a30a73 audit: fix event ... |
2187 |
|
15564ff0a audit: make ANOM_... |
2188 |
if (!audit_enabled || audit_dummy_context()) |
b24a30a73 audit: fix event ... |
2189 |
return; |
a51d9eaa4 fs: add link rest... |
2190 |
|
245d73698 audit: Report sus... |
2191 2192 |
/* Generate log with subject, operation, outcome. */ ab = audit_log_start(audit_context(), GFP_KERNEL, type); |
d1c7d97ad fs: handle failed... |
2193 |
if (!ab) |
45b578fe4 audit: link denie... |
2194 |
return; |
b24a30a73 audit: fix event ... |
2195 |
audit_log_format(ab, "op=%s", operation); |
2a1fe215e audit: use curren... |
2196 |
audit_log_task_info(ab); |
b24a30a73 audit: fix event ... |
2197 |
audit_log_format(ab, " res=0"); |
a51d9eaa4 fs: add link rest... |
2198 2199 |
audit_log_end(ab); } |
4b7d248b3 audit: move login... |
2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 |
/* global counter which is incremented every time something logs in */ static atomic_t session_id = ATOMIC_INIT(0); static int audit_set_loginuid_perm(kuid_t loginuid) { /* if we are unset, we don't need privs */ if (!audit_loginuid_set(current)) return 0; /* if AUDIT_FEATURE_LOGINUID_IMMUTABLE means never ever allow a change*/ if (is_audit_feature_set(AUDIT_FEATURE_LOGINUID_IMMUTABLE)) return -EPERM; /* it is set, you need permission */ if (!capable(CAP_AUDIT_CONTROL)) return -EPERM; /* reject if this is not an unset and we don't allow that */ if (is_audit_feature_set(AUDIT_FEATURE_ONLY_UNSET_LOGINUID) && uid_valid(loginuid)) return -EPERM; return 0; } static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid, unsigned int oldsessionid, unsigned int sessionid, int rc) { struct audit_buffer *ab; uid_t uid, oldloginuid, loginuid; struct tty_struct *tty; if (!audit_enabled) return; |
73e65b88f audit: connect LO... |
2231 |
ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_LOGIN); |
4b7d248b3 audit: move login... |
2232 2233 2234 2235 2236 |
if (!ab) return; uid = from_kuid(&init_user_ns, task_uid(current)); oldloginuid = from_kuid(&init_user_ns, koldloginuid); |
a1b861faa kernel/audit: con... |
2237 |
loginuid = from_kuid(&init_user_ns, kloginuid); |
4b7d248b3 audit: move login... |
2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 |
tty = audit_get_tty(); audit_log_format(ab, "pid=%d uid=%u", task_tgid_nr(current), uid); audit_log_task_context(ab); audit_log_format(ab, " old-auid=%u auid=%u tty=%s old-ses=%u ses=%u res=%d", oldloginuid, loginuid, tty ? tty_name(tty) : "(none)", oldsessionid, sessionid, !rc); audit_put_tty(tty); audit_log_end(ab); } /** * audit_set_loginuid - set current task's loginuid * @loginuid: loginuid value * * Returns 0. * * Called (set) from fs/proc/base.c::proc_loginuid_write(). */ int audit_set_loginuid(kuid_t loginuid) { unsigned int oldsessionid, sessionid = AUDIT_SID_UNSET; kuid_t oldloginuid; int rc; oldloginuid = audit_get_loginuid(current); oldsessionid = audit_get_sessionid(current); rc = audit_set_loginuid_perm(loginuid); if (rc) goto out; /* are we setting or clearing? */ if (uid_valid(loginuid)) { sessionid = (unsigned int)atomic_inc_return(&session_id); if (unlikely(sessionid == AUDIT_SID_UNSET)) sessionid = (unsigned int)atomic_inc_return(&session_id); } current->sessionid = sessionid; current->loginuid = loginuid; out: audit_log_set_loginuid(oldloginuid, loginuid, oldsessionid, sessionid, rc); return rc; } |
a51d9eaa4 fs: add link rest... |
2283 |
/** |
b48345aaf audit: deliver si... |
2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 |
* audit_signal_info - record signal info for shutting down audit subsystem * @sig: signal value * @t: task being signaled * * If the audit subsystem is being terminated, record the task (pid) * and uid that is doing that. */ int audit_signal_info(int sig, struct task_struct *t) { kuid_t uid = current_uid(), auid; if (auditd_test_task(t) && (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2)) { audit_sig_pid = task_tgid_nr(current); auid = audit_get_loginuid(current); if (uid_valid(auid)) audit_sig_uid = auid; else audit_sig_uid = uid; |
4ebd7651b lsm: separate sec... |
2304 |
security_task_getsecid_subj(current, &audit_sig_sid); |
b48345aaf audit: deliver si... |
2305 2306 2307 2308 2309 2310 |
} return audit_signal_info_syscall(t); } /** |
b0dd25a82 [PATCH] AUDIT: ke... |
2311 2312 2313 |
* audit_log_end - end one audit record * @ab: the audit_buffer * |
4aa83872d audit: queue netl... |
2314 2315 |
* We can not do a netlink send inside an irq context because it blocks (last * arg, flags, is not set to MSG_DONTWAIT), so the audit buffer is placed on a |
c1de44631 audit: Remove lef... |
2316 |
* queue and a kthread is scheduled to remove them from the queue outside the |
4aa83872d audit: queue netl... |
2317 |
* irq context. May be called in any context. |
b0dd25a82 [PATCH] AUDIT: ke... |
2318 |
*/ |
b7d112581 AUDIT: Send netli... |
2319 |
void audit_log_end(struct audit_buffer *ab) |
1da177e4c Linux-2.6.12-rc2 |
2320 |
{ |
5b52330bb audit: fix auditd... |
2321 2322 |
struct sk_buff *skb; struct nlmsghdr *nlh; |
1da177e4c Linux-2.6.12-rc2 |
2323 2324 |
if (!ab) return; |
5b52330bb audit: fix auditd... |
2325 2326 2327 |
if (audit_rate_check()) { skb = ab->skb; |
f3d357b09 Audit: save audit... |
2328 |
ab->skb = NULL; |
5b52330bb audit: fix auditd... |
2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 |
/* setup the netlink header, see the comments in * kauditd_send_multicast_skb() for length quirks */ nlh = nlmsg_hdr(skb); nlh->nlmsg_len = skb->len - NLMSG_HDRLEN; /* queue the netlink packet and poke the kauditd thread */ skb_queue_tail(&audit_queue, skb); wake_up_interruptible(&kauditd_wait); } else audit_log_lost("rate limit exceeded"); |
16e1904e6 AUDIT: Add helper... |
2340 |
audit_buffer_free(ab); |
1da177e4c Linux-2.6.12-rc2 |
2341 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 |
/** * audit_log - Log an audit record * @ctx: audit context * @gfp_mask: type of allocation * @type: audit message type * @fmt: format string to use * @...: variable parameters matching the format string * * This is a convenience function that calls audit_log_start, * audit_log_vformat, and audit_log_end. It may be called * in any context. */ |
5600b8927 whitespace fixes:... |
2354 |
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type, |
9ad9ad385 AUDIT: Wait for b... |
2355 |
const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
2356 2357 2358 |
{ struct audit_buffer *ab; va_list args; |
9ad9ad385 AUDIT: Wait for b... |
2359 |
ab = audit_log_start(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
2360 2361 2362 2363 2364 2365 2366 |
if (ab) { va_start(args, fmt); audit_log_vformat(ab, fmt, args); va_end(args); audit_log_end(ab); } } |
bf45da97a [PATCH] EXPORT_SY... |
2367 2368 2369 2370 2371 |
EXPORT_SYMBOL(audit_log_start); EXPORT_SYMBOL(audit_log_end); EXPORT_SYMBOL(audit_log_format); EXPORT_SYMBOL(audit_log); |