Blame view
kernel/audit.c
62.4 KB
85c8721ff audit: update poi... |
1 |
/* audit.c -- Auditing support |
1da177e4c Linux-2.6.12-rc2 |
2 3 4 |
* Gateway between the kernel (e.g., selinux) and the user-space audit daemon. * System-call specific features have moved to auditsc.c * |
6a01b07fa [PATCH] audit con... |
5 |
* Copyright 2003-2007 Red Hat Inc., Durham, North Carolina. |
1da177e4c Linux-2.6.12-rc2 |
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 |
* All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Written by Rickard E. (Rik) Faith <faith@redhat.com> * |
d7a96f3a1 Audit: internally... |
24 |
* Goals: 1) Integrate fully with Security Modules. |
1da177e4c Linux-2.6.12-rc2 |
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 |
* 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. * |
d590dca62 audit: update bug... |
41 42 |
* Audit userspace, documentation, tests, and bug/issue trackers: * https://github.com/linux-audit |
1da177e4c Linux-2.6.12-rc2 |
43 |
*/ |
d957f7b72 audit: Use more c... |
44 |
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
5b2825527 audit: reduce mma... |
45 |
#include <linux/file.h> |
1da177e4c Linux-2.6.12-rc2 |
46 |
#include <linux/init.h> |
7153e4027 ipc, kernel: use ... |
47 |
#include <linux/types.h> |
60063497a atomic: use <linu... |
48 |
#include <linux/atomic.h> |
1da177e4c Linux-2.6.12-rc2 |
49 |
#include <linux/mm.h> |
9984de1a5 kernel: Map most ... |
50 |
#include <linux/export.h> |
5a0e3ad6a include cleanup: ... |
51 |
#include <linux/slab.h> |
b7d112581 AUDIT: Send netli... |
52 53 |
#include <linux/err.h> #include <linux/kthread.h> |
46e959ea2 audit: add an opt... |
54 |
#include <linux/kernel.h> |
b24a30a73 audit: fix event ... |
55 |
#include <linux/syscalls.h> |
5b52330bb audit: fix auditd... |
56 57 58 59 |
#include <linux/spinlock.h> #include <linux/rcupdate.h> #include <linux/mutex.h> #include <linux/gfp.h> |
b6c7c115c audit: store the ... |
60 |
#include <linux/pid.h> |
8cc96382d audit: use kmem_c... |
61 |
#include <linux/slab.h> |
1da177e4c Linux-2.6.12-rc2 |
62 63 64 65 |
#include <linux/audit.h> #include <net/sock.h> |
93315ed6d [PATCH] audit str... |
66 |
#include <net/netlink.h> |
1da177e4c Linux-2.6.12-rc2 |
67 |
#include <linux/skbuff.h> |
131ad62d8 netfilter: add SE... |
68 69 70 |
#ifdef CONFIG_SECURITY #include <linux/security.h> #endif |
7dfb71030 [PATCH] Add inclu... |
71 |
#include <linux/freezer.h> |
34e36d8ec audit: Limit audi... |
72 |
#include <linux/pid_namespace.h> |
33faba7fa audit: listen in ... |
73 |
#include <net/netns/generic.h> |
3dc7e3153 [PATCH] support f... |
74 75 |
#include "audit.h" |
1da177e4c Linux-2.6.12-rc2 |
76 |
|
a3f07114e [PATCH] Audit: ma... |
77 |
/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED. |
1da177e4c Linux-2.6.12-rc2 |
78 |
* (Initialization happens after skb_init is called.) */ |
a3f07114e [PATCH] Audit: ma... |
79 80 81 |
#define AUDIT_DISABLED -1 #define AUDIT_UNINITIALIZED 0 #define AUDIT_INITIALIZED 1 |
1da177e4c Linux-2.6.12-rc2 |
82 |
static int audit_initialized; |
173743dd9 audit: ensure tha... |
83 |
u32 audit_enabled = AUDIT_OFF; |
b3b4fdf6a audit: convert au... |
84 |
bool audit_ever_enabled = !!AUDIT_OFF; |
1da177e4c Linux-2.6.12-rc2 |
85 |
|
ae9d67aff audit: export sym... |
86 |
EXPORT_SYMBOL_GPL(audit_enabled); |
1da177e4c Linux-2.6.12-rc2 |
87 |
/* Default state when kernel boots without any parameters. */ |
173743dd9 audit: ensure tha... |
88 |
static u32 audit_default = AUDIT_OFF; |
1da177e4c Linux-2.6.12-rc2 |
89 90 |
/* If auditing cannot proceed, audit_failure selects what happens. */ |
3e1d0bb62 audit: Convert in... |
91 |
static u32 audit_failure = AUDIT_FAIL_PRINTK; |
1da177e4c Linux-2.6.12-rc2 |
92 |
|
5b52330bb audit: fix auditd... |
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 |
/* 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 |
48d0e023a audit: fix the RC... |
109 |
* @rcu: RCU head |
5b52330bb audit: fix auditd... |
110 111 112 |
* * Description: * This struct is RCU protected; you must either hold the RCU lock for reading |
48d0e023a audit: fix the RC... |
113 |
* or the associated spinlock for writing. |
75c0371a2 audit: netlink so... |
114 |
*/ |
5b52330bb audit: fix auditd... |
115 |
static struct auditd_connection { |
b6c7c115c audit: store the ... |
116 |
struct pid *pid; |
5b52330bb audit: fix auditd... |
117 118 |
u32 portid; struct net *net; |
48d0e023a audit: fix the RC... |
119 120 121 |
struct rcu_head rcu; } *auditd_conn = NULL; static DEFINE_SPINLOCK(auditd_conn_lock); |
1da177e4c Linux-2.6.12-rc2 |
122 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
123 |
/* If audit_rate_limit is non-zero, limit the rate of sending audit records |
1da177e4c Linux-2.6.12-rc2 |
124 125 |
* to that number per second. This prevents DoS attacks, but results in * audit records being dropped. */ |
3e1d0bb62 audit: Convert in... |
126 |
static u32 audit_rate_limit; |
1da177e4c Linux-2.6.12-rc2 |
127 |
|
40c0775e5 audit: allow unli... |
128 129 |
/* Number of outstanding audit_buffers allowed. * When set to zero, this means unlimited. */ |
3e1d0bb62 audit: Convert in... |
130 |
static u32 audit_backlog_limit = 64; |
e789e561a audit: reset audi... |
131 |
#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ) |
3e1d0bb62 audit: Convert in... |
132 |
static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME; |
1da177e4c Linux-2.6.12-rc2 |
133 |
|
c2f0c7c35 The attached patc... |
134 |
/* The identity of the user shutting down the audit system. */ |
cca080d9b userns: Convert a... |
135 |
kuid_t audit_sig_uid = INVALID_UID; |
c2f0c7c35 The attached patc... |
136 |
pid_t audit_sig_pid = -1; |
e1396065e [PATCH] collect s... |
137 |
u32 audit_sig_sid = 0; |
c2f0c7c35 The attached patc... |
138 |
|
1da177e4c Linux-2.6.12-rc2 |
139 140 141 142 143 144 145 |
/* 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 */ |
92c82e8a3 audit: add featur... |
146 |
static atomic_t audit_lost = ATOMIC_INIT(0); |
1da177e4c Linux-2.6.12-rc2 |
147 |
|
f368c07d7 [PATCH] audit: pa... |
148 149 |
/* Hash for inode-based rules */ struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; |
8cc96382d audit: use kmem_c... |
150 |
static struct kmem_cache *audit_buffer_cache; |
1da177e4c Linux-2.6.12-rc2 |
151 |
|
c6480207f audit: rework the... |
152 |
/* queue msgs to send via kauditd_task */ |
af8b824f2 audit: rename the... |
153 |
static struct sk_buff_head audit_queue; |
c6480207f audit: rework the... |
154 155 156 |
/* queue msgs due to temporary unicast send problems */ static struct sk_buff_head audit_retry_queue; /* queue msgs waiting for new auditd connection */ |
af8b824f2 audit: rename the... |
157 |
static struct sk_buff_head audit_hold_queue; |
c6480207f audit: rework the... |
158 159 |
/* queue servicing thread */ |
b7d112581 AUDIT: Send netli... |
160 161 |
static struct task_struct *kauditd_task; static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait); |
c6480207f audit: rework the... |
162 163 |
/* waitqueue for callers who are blocked on the audit backlog */ |
9ad9ad385 AUDIT: Wait for b... |
164 |
static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait); |
1da177e4c Linux-2.6.12-rc2 |
165 |
|
b0fed4021 audit: implement ... |
166 167 168 169 |
static struct audit_features af = {.vers = AUDIT_FEATURE_VERSION, .mask = -1, .features = 0, .lock = 0,}; |
21b85c31d audit: audit feat... |
170 |
static char *audit_feature_names[2] = { |
d040e5af3 audit: audit feat... |
171 |
"only_unset_loginuid", |
21b85c31d audit: audit feat... |
172 |
"loginuid_immutable", |
b0fed4021 audit: implement ... |
173 |
}; |
ce423631c audit: track the ... |
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 |
/** * 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; |
1da177e4c Linux-2.6.12-rc2 |
189 190 191 192 193 |
/* 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 |
1da177e4c Linux-2.6.12-rc2 |
194 195 196 197 198 199 |
/* 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 { |
8fc6115c2 AUDIT: expand aud... |
200 |
struct sk_buff *skb; /* formatted skb ready to send */ |
1da177e4c Linux-2.6.12-rc2 |
201 |
struct audit_context *ctx; /* NULL or associated context */ |
9796fdd82 [PATCH] gfp_t: ke... |
202 |
gfp_t gfp_mask; |
1da177e4c Linux-2.6.12-rc2 |
203 |
}; |
f09ac9db2 Audit: stop deadl... |
204 |
struct audit_reply { |
f9441639e audit: fix netlin... |
205 |
__u32 portid; |
638a0fd2a audit: Use struct... |
206 |
struct net *net; |
f09ac9db2 Audit: stop deadl... |
207 208 |
struct sk_buff *skb; }; |
5b52330bb audit: fix auditd... |
209 210 211 212 213 214 215 |
/** * 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. */ |
b6c7c115c audit: store the ... |
216 |
int auditd_test_task(struct task_struct *task) |
5b52330bb audit: fix auditd... |
217 218 |
{ int rc; |
48d0e023a audit: fix the RC... |
219 |
struct auditd_connection *ac; |
5b52330bb audit: fix auditd... |
220 221 |
rcu_read_lock(); |
48d0e023a audit: fix the RC... |
222 223 |
ac = rcu_dereference(auditd_conn); rc = (ac && ac->pid == task_tgid(task) ? 1 : 0); |
5b52330bb audit: fix auditd... |
224 225 226 227 228 229 |
rcu_read_unlock(); return rc; } /** |
ce423631c audit: track the ... |
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 |
* 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); } /** |
b6c7c115c audit: store the ... |
260 |
* auditd_pid_vnr - Return the auditd PID relative to the namespace |
b6c7c115c audit: store the ... |
261 262 |
* * Description: |
48d0e023a audit: fix the RC... |
263 |
* Returns the PID in relation to the namespace, 0 on failure. |
b6c7c115c audit: store the ... |
264 |
*/ |
48d0e023a audit: fix the RC... |
265 |
static pid_t auditd_pid_vnr(void) |
b6c7c115c audit: store the ... |
266 267 |
{ pid_t pid; |
48d0e023a audit: fix the RC... |
268 |
const struct auditd_connection *ac; |
b6c7c115c audit: store the ... |
269 270 |
rcu_read_lock(); |
48d0e023a audit: fix the RC... |
271 272 |
ac = rcu_dereference(auditd_conn); if (!ac || !ac->pid) |
b6c7c115c audit: store the ... |
273 274 |
pid = 0; else |
48d0e023a audit: fix the RC... |
275 |
pid = pid_vnr(ac->pid); |
b6c7c115c audit: store the ... |
276 277 278 279 280 281 |
rcu_read_unlock(); return pid; } /** |
5b52330bb audit: fix auditd... |
282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 |
* 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; } |
8c8570fb8 [PATCH] Capture s... |
299 |
void audit_panic(const char *message) |
1da177e4c Linux-2.6.12-rc2 |
300 |
{ |
d957f7b72 audit: Use more c... |
301 |
switch (audit_failure) { |
1da177e4c Linux-2.6.12-rc2 |
302 303 304 |
case AUDIT_FAIL_SILENT: break; case AUDIT_FAIL_PRINTK: |
320f1b1ed [AUDIT] ratelimit... |
305 |
if (printk_ratelimit()) |
d957f7b72 audit: Use more c... |
306 307 |
pr_err("%s ", message); |
1da177e4c Linux-2.6.12-rc2 |
308 309 |
break; case AUDIT_FAIL_PANIC: |
5b52330bb audit: fix auditd... |
310 311 |
panic("audit: %s ", message); |
1da177e4c Linux-2.6.12-rc2 |
312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 |
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; } |
b0dd25a82 [PATCH] AUDIT: ke... |
344 345 346 347 348 349 350 351 |
/** * 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. */ |
1da177e4c Linux-2.6.12-rc2 |
352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 |
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) { |
320f1b1ed [AUDIT] ratelimit... |
375 |
if (printk_ratelimit()) |
3e1d0bb62 audit: Convert in... |
376 377 |
pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u ", |
320f1b1ed [AUDIT] ratelimit... |
378 379 380 |
atomic_read(&audit_lost), audit_rate_limit, audit_backlog_limit); |
1da177e4c Linux-2.6.12-rc2 |
381 382 |
audit_panic(message); } |
1da177e4c Linux-2.6.12-rc2 |
383 |
} |
3e1d0bb62 audit: Convert in... |
384 |
static int audit_log_config_change(char *function_name, u32 new, u32 old, |
2532386f4 Audit: collect se... |
385 |
int allow_changes) |
1da177e4c Linux-2.6.12-rc2 |
386 |
{ |
1a6b9f231 [AUDIT] make audi... |
387 388 |
struct audit_buffer *ab; int rc = 0; |
ce29b682e [PATCH] More user... |
389 |
|
1a6b9f231 [AUDIT] make audi... |
390 |
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); |
0644ec0cc audit: catch poss... |
391 392 |
if (unlikely(!ab)) return rc; |
3e1d0bb62 audit: Convert in... |
393 |
audit_log_format(ab, "%s=%u old=%u", function_name, new, old); |
4d3fb709b helper for some s... |
394 |
audit_log_session_info(ab); |
b122c3767 audit: use a cons... |
395 396 397 |
rc = audit_log_task_context(ab); if (rc) allow_changes = 0; /* Something weird, deny request */ |
1a6b9f231 [AUDIT] make audi... |
398 399 |
audit_log_format(ab, " res=%d", allow_changes); audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
400 |
return rc; |
1da177e4c Linux-2.6.12-rc2 |
401 |
} |
3e1d0bb62 audit: Convert in... |
402 |
static int audit_do_config_change(char *function_name, u32 *to_change, u32 new) |
1da177e4c Linux-2.6.12-rc2 |
403 |
{ |
3e1d0bb62 audit: Convert in... |
404 405 |
int allow_changes, rc = 0; u32 old = *to_change; |
6a01b07fa [PATCH] audit con... |
406 407 |
/* check if we are locked */ |
1a6b9f231 [AUDIT] make audi... |
408 409 |
if (audit_enabled == AUDIT_LOCKED) allow_changes = 0; |
6a01b07fa [PATCH] audit con... |
410 |
else |
1a6b9f231 [AUDIT] make audi... |
411 |
allow_changes = 1; |
ce29b682e [PATCH] More user... |
412 |
|
1a6b9f231 [AUDIT] make audi... |
413 |
if (audit_enabled != AUDIT_OFF) { |
dc9eb698f audit: stop pushi... |
414 |
rc = audit_log_config_change(function_name, new, old, allow_changes); |
1a6b9f231 [AUDIT] make audi... |
415 416 |
if (rc) allow_changes = 0; |
6a01b07fa [PATCH] audit con... |
417 |
} |
6a01b07fa [PATCH] audit con... |
418 419 |
/* If we are allowed, make the change */ |
1a6b9f231 [AUDIT] make audi... |
420 421 |
if (allow_changes == 1) *to_change = new; |
6a01b07fa [PATCH] audit con... |
422 423 424 425 |
/* Not allowed, update reason */ else if (rc == 0) rc = -EPERM; return rc; |
1da177e4c Linux-2.6.12-rc2 |
426 |
} |
3e1d0bb62 audit: Convert in... |
427 |
static int audit_set_rate_limit(u32 limit) |
1da177e4c Linux-2.6.12-rc2 |
428 |
{ |
dc9eb698f audit: stop pushi... |
429 |
return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit); |
1a6b9f231 [AUDIT] make audi... |
430 |
} |
ce29b682e [PATCH] More user... |
431 |
|
3e1d0bb62 audit: Convert in... |
432 |
static int audit_set_backlog_limit(u32 limit) |
1a6b9f231 [AUDIT] make audi... |
433 |
{ |
dc9eb698f audit: stop pushi... |
434 |
return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit); |
1a6b9f231 [AUDIT] make audi... |
435 |
} |
6a01b07fa [PATCH] audit con... |
436 |
|
3e1d0bb62 audit: Convert in... |
437 |
static int audit_set_backlog_wait_time(u32 timeout) |
51cc83f02 audit: add audit_... |
438 439 |
{ return audit_do_config_change("audit_backlog_wait_time", |
319754248 audit: rework aud... |
440 |
&audit_backlog_wait_time, timeout); |
51cc83f02 audit: add audit_... |
441 |
} |
3e1d0bb62 audit: Convert in... |
442 |
static int audit_set_enabled(u32 state) |
1a6b9f231 [AUDIT] make audi... |
443 |
{ |
b593d384e [AUDIT] create co... |
444 |
int rc; |
724e7bfcc audit: Remove con... |
445 |
if (state > AUDIT_LOCKED) |
1a6b9f231 [AUDIT] make audi... |
446 |
return -EINVAL; |
6a01b07fa [PATCH] audit con... |
447 |
|
dc9eb698f audit: stop pushi... |
448 |
rc = audit_do_config_change("audit_enabled", &audit_enabled, state); |
b593d384e [AUDIT] create co... |
449 450 451 452 |
if (!rc) audit_ever_enabled |= !!state; return rc; |
1da177e4c Linux-2.6.12-rc2 |
453 |
} |
3e1d0bb62 audit: Convert in... |
454 |
static int audit_set_failure(u32 state) |
1da177e4c Linux-2.6.12-rc2 |
455 |
{ |
1da177e4c Linux-2.6.12-rc2 |
456 457 458 459 |
if (state != AUDIT_FAIL_SILENT && state != AUDIT_FAIL_PRINTK && state != AUDIT_FAIL_PANIC) return -EINVAL; |
ce29b682e [PATCH] More user... |
460 |
|
dc9eb698f audit: stop pushi... |
461 |
return audit_do_config_change("audit_failure", &audit_failure, state); |
1da177e4c Linux-2.6.12-rc2 |
462 |
} |
5b52330bb audit: fix auditd... |
463 |
/** |
48d0e023a audit: fix the RC... |
464 465 466 467 468 469 470 |
* 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... |
471 472 |
static void auditd_conn_free(struct rcu_head *rcu) { |
48d0e023a audit: fix the RC... |
473 474 475 476 477 478 |
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... |
479 |
} |
48d0e023a audit: fix the RC... |
480 481 |
/** |
5b52330bb audit: fix auditd... |
482 483 484 485 486 487 488 |
* 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... |
489 |
* necessary. Returns zero on success, negative values on failure. |
5b52330bb audit: fix auditd... |
490 |
*/ |
48d0e023a audit: fix the RC... |
491 |
static int auditd_set(struct pid *pid, u32 portid, struct net *net) |
5b52330bb audit: fix auditd... |
492 493 |
{ unsigned long flags; |
48d0e023a audit: fix the RC... |
494 |
struct auditd_connection *ac_old, *ac_new; |
5b52330bb audit: fix auditd... |
495 |
|
48d0e023a audit: fix the RC... |
496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 |
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... |
516 517 518 |
} /** |
5b52330bb audit: fix auditd... |
519 520 521 522 523 |
* kauditd_print_skb - Print the audit record to the ring buffer * @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 ... |
524 |
*/ |
af8b824f2 audit: rename the... |
525 |
static void kauditd_printk_skb(struct sk_buff *skb) |
038cbcf65 Audit: unify the ... |
526 527 |
{ struct nlmsghdr *nlh = nlmsg_hdr(skb); |
c64e66c67 audit: netlink: M... |
528 |
char *data = nlmsg_data(nlh); |
038cbcf65 Audit: unify the ... |
529 |
|
5b52330bb audit: fix auditd... |
530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 |
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 * * Description: * This should only be used by the kauditd_thread when it fails to flush the * hold queue. */ static void kauditd_rehold_skb(struct sk_buff *skb) { /* put the record back in the queue at the same place */ skb_queue_head(&audit_hold_queue, skb); |
c6480207f audit: rework the... |
547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 |
} /** * kauditd_hold_skb - Queue an audit record, waiting for auditd * @skb: audit record * * 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. */ static void kauditd_hold_skb(struct sk_buff *skb) { /* 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? */ if (!audit_default) { kfree_skb(skb); return; } /* if we have room, queue the message */ 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 ... |
579 |
|
c6480207f audit: rework the... |
580 581 582 |
/* we have no other options - drop the message */ audit_log_lost("kauditd hold queue overflow"); kfree_skb(skb); |
038cbcf65 Audit: unify the ... |
583 |
} |
c6480207f audit: rework the... |
584 585 586 587 588 589 590 591 592 593 |
/** * kauditd_retry_skb - Queue an audit record, attempt to send again to auditd * @skb: audit record * * 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. */ static void kauditd_retry_skb(struct sk_buff *skb) |
f3d357b09 Audit: save audit... |
594 |
{ |
c6480207f audit: rework the... |
595 596 597 598 599 |
/* NOTE: because records should only live in the retry queue for a * short period of time, before either being sent or moved to the hold * queue, we don't currently enforce a limit on this queue */ skb_queue_tail(&audit_retry_queue, skb); } |
32a1dbaec audit: try harder... |
600 |
|
c6480207f audit: rework the... |
601 |
/** |
264d50963 audit: make sure ... |
602 |
* auditd_reset - Disconnect the auditd connection |
c81be52a3 audit: fix a race... |
603 |
* @ac: auditd connection state |
264d50963 audit: make sure ... |
604 605 606 |
* * Description: * Break the auditd/kauditd connection and move all the queued records into the |
c81be52a3 audit: fix a race... |
607 608 609 610 |
* 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 ... |
611 |
*/ |
c81be52a3 audit: fix a race... |
612 |
static void auditd_reset(const struct auditd_connection *ac) |
264d50963 audit: make sure ... |
613 |
{ |
48d0e023a audit: fix the RC... |
614 |
unsigned long flags; |
264d50963 audit: make sure ... |
615 |
struct sk_buff *skb; |
48d0e023a audit: fix the RC... |
616 |
struct auditd_connection *ac_old; |
264d50963 audit: make sure ... |
617 618 |
/* if it isn't already broken, break the connection */ |
48d0e023a audit: fix the RC... |
619 620 621 |
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... |
622 623 624 625 626 |
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... |
627 628 629 630 631 |
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 ... |
632 |
|
cd33f5f2c audit: make sure ... |
633 634 |
/* 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 ... |
635 636 |
while ((skb = skb_dequeue(&audit_retry_queue))) kauditd_hold_skb(skb); |
264d50963 audit: make sure ... |
637 638 639 |
} /** |
5b52330bb audit: fix auditd... |
640 641 |
* auditd_send_unicast_skb - Send a record via unicast to auditd * @skb: audit record |
c6480207f audit: rework the... |
642 643 |
* * Description: |
5b52330bb audit: fix auditd... |
644 645 646 647 648 |
* 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... |
649 |
*/ |
5b52330bb audit: fix auditd... |
650 |
static int auditd_send_unicast_skb(struct sk_buff *skb) |
c6480207f audit: rework the... |
651 |
{ |
5b52330bb audit: fix auditd... |
652 653 654 655 |
int rc; u32 portid; struct net *net; struct sock *sk; |
48d0e023a audit: fix the RC... |
656 |
struct auditd_connection *ac; |
5b52330bb audit: fix auditd... |
657 658 659 660 661 662 663 664 665 |
/* 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... |
666 667 |
ac = rcu_dereference(auditd_conn); if (!ac) { |
5b52330bb audit: fix auditd... |
668 |
rcu_read_unlock(); |
b0659ae5e audit: fix memlea... |
669 |
kfree_skb(skb); |
5b52330bb audit: fix auditd... |
670 671 |
rc = -ECONNREFUSED; goto err; |
533c7b69c audit: use proper... |
672 |
} |
48d0e023a audit: fix the RC... |
673 |
net = get_net(ac->net); |
5b52330bb audit: fix auditd... |
674 |
sk = audit_get_sk(net); |
48d0e023a audit: fix the RC... |
675 |
portid = ac->portid; |
5b52330bb audit: fix auditd... |
676 |
rcu_read_unlock(); |
c6480207f audit: rework the... |
677 |
|
5b52330bb audit: fix auditd... |
678 679 680 681 682 683 684 685 |
rc = netlink_unicast(sk, skb, portid, 0); put_net(net); if (rc < 0) goto err; return rc; err: |
c81be52a3 audit: fix a race... |
686 687 |
if (ac && rc == -ECONNREFUSED) auditd_reset(ac); |
5b52330bb audit: fix auditd... |
688 |
return rc; |
c6480207f audit: rework the... |
689 690 691 |
} /** |
5b52330bb audit: fix auditd... |
692 693 694 695 696 697 698 699 700 701 702 703 704 |
* 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... |
705 |
*/ |
5b52330bb audit: fix auditd... |
706 707 708 709 710 |
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), void (*err_hook)(struct sk_buff *skb)) |
c6480207f audit: rework the... |
711 |
{ |
5b52330bb audit: fix auditd... |
712 713 714 |
int rc = 0; struct sk_buff *skb; static unsigned int failed = 0; |
32a1dbaec audit: try harder... |
715 |
|
5b52330bb audit: fix auditd... |
716 717 718 719 720 721 722 723 724 725 726 727 728 729 |
/* NOTE: kauditd_thread takes care of all our locking, we just use * the netlink info passed to us (e.g. sk and portid) */ while ((skb = skb_dequeue(queue))) { /* 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) (*err_hook)(skb); continue; } |
6c54e7899 audit: handle a c... |
730 |
|
5b52330bb audit: fix auditd... |
731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 |
/* grab an extra skb reference in case of error */ skb_get(skb); rc = netlink_unicast(sk, skb, portid, 0); if (rc < 0) { /* fatal failure for our queue flush attempt? */ if (++failed >= retry_limit || rc == -ECONNREFUSED || rc == -EPERM) { /* yes - error processing for the queue */ sk = NULL; if (err_hook) (*err_hook)(skb); if (!skb_hook) goto out; /* keep processing with the skb_hook */ continue; } else /* no - requeue to preserve ordering */ skb_queue_head(queue, skb); } else { /* it worked - drop the extra reference and continue */ consume_skb(skb); failed = 0; } |
c6480207f audit: rework the... |
754 |
} |
5b52330bb audit: fix auditd... |
755 756 |
out: return (rc >= 0 ? 0 : rc); |
f3d357b09 Audit: save audit... |
757 |
} |
b551d1d98 audit: refactor h... |
758 |
/* |
c6480207f audit: rework the... |
759 760 |
* kauditd_send_multicast_skb - Send a record to any multicast listeners * @skb: audit record |
451f92163 audit: add netlin... |
761 |
* |
c6480207f audit: rework the... |
762 |
* Description: |
5b52330bb audit: fix auditd... |
763 764 765 |
* 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... |
766 |
*/ |
c6480207f audit: rework the... |
767 |
static void kauditd_send_multicast_skb(struct sk_buff *skb) |
451f92163 audit: add netlin... |
768 |
{ |
c6480207f audit: rework the... |
769 |
struct sk_buff *copy; |
5b52330bb audit: fix auditd... |
770 |
struct sock *sock = audit_get_sk(&init_net); |
c6480207f audit: rework the... |
771 |
struct nlmsghdr *nlh; |
451f92163 audit: add netlin... |
772 |
|
5b52330bb audit: fix auditd... |
773 774 |
/* 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... |
775 776 |
if (!netlink_has_listeners(sock, AUDIT_NLGRP_READLOG)) return; |
451f92163 audit: add netlin... |
777 778 779 780 781 782 783 784 785 786 |
/* * 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... |
787 |
copy = skb_copy(skb, GFP_KERNEL); |
451f92163 audit: add netlin... |
788 789 |
if (!copy) return; |
c6480207f audit: rework the... |
790 791 |
nlh = nlmsg_hdr(copy); nlh->nlmsg_len = skb->len; |
451f92163 audit: add netlin... |
792 |
|
c6480207f audit: rework the... |
793 |
nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, GFP_KERNEL); |
451f92163 audit: add netlin... |
794 |
} |
c6480207f audit: rework the... |
795 |
/** |
5b52330bb audit: fix auditd... |
796 797 |
* kauditd_thread - Worker thread to send audit records to userspace * @dummy: unused |
b551d1d98 audit: refactor h... |
798 |
*/ |
97a41e261 [PATCH] kernel/: ... |
799 |
static int kauditd_thread(void *dummy) |
b7d112581 AUDIT: Send netli... |
800 |
{ |
c6480207f audit: rework the... |
801 |
int rc; |
5b52330bb audit: fix auditd... |
802 803 804 |
u32 portid = 0; struct net *net = NULL; struct sock *sk = NULL; |
48d0e023a audit: fix the RC... |
805 |
struct auditd_connection *ac; |
4aa83872d audit: queue netl... |
806 |
|
c6480207f audit: rework the... |
807 |
#define UNICAST_RETRIES 5 |
c6480207f audit: rework the... |
808 |
|
831441862 Freezer: make ker... |
809 |
set_freezable(); |
4899b8b16 [PATCH] kauditd_t... |
810 |
while (!kthread_should_stop()) { |
5b52330bb audit: fix auditd... |
811 812 |
/* NOTE: see the lock comments in auditd_send_unicast_skb() */ rcu_read_lock(); |
48d0e023a audit: fix the RC... |
813 814 |
ac = rcu_dereference(auditd_conn); if (!ac) { |
5b52330bb audit: fix auditd... |
815 816 817 |
rcu_read_unlock(); goto main_queue; } |
48d0e023a audit: fix the RC... |
818 |
net = get_net(ac->net); |
5b52330bb audit: fix auditd... |
819 |
sk = audit_get_sk(net); |
48d0e023a audit: fix the RC... |
820 |
portid = ac->portid; |
5b52330bb audit: fix auditd... |
821 |
rcu_read_unlock(); |
c6480207f audit: rework the... |
822 823 |
/* attempt to flush the hold queue */ |
5b52330bb audit: fix auditd... |
824 825 826 |
rc = kauditd_send_queue(sk, portid, &audit_hold_queue, UNICAST_RETRIES, NULL, kauditd_rehold_skb); |
c81be52a3 audit: fix a race... |
827 |
if (ac && rc < 0) { |
5b52330bb audit: fix auditd... |
828 |
sk = NULL; |
c81be52a3 audit: fix a race... |
829 |
auditd_reset(ac); |
5b52330bb audit: fix auditd... |
830 |
goto main_queue; |
c6480207f audit: rework the... |
831 |
} |
f3d357b09 Audit: save audit... |
832 |
|
c6480207f audit: rework the... |
833 |
/* attempt to flush the retry queue */ |
5b52330bb audit: fix auditd... |
834 835 836 |
rc = kauditd_send_queue(sk, portid, &audit_retry_queue, UNICAST_RETRIES, NULL, kauditd_hold_skb); |
c81be52a3 audit: fix a race... |
837 |
if (ac && rc < 0) { |
5b52330bb audit: fix auditd... |
838 |
sk = NULL; |
c81be52a3 audit: fix a race... |
839 |
auditd_reset(ac); |
5b52330bb audit: fix auditd... |
840 |
goto main_queue; |
c6480207f audit: rework the... |
841 |
} |
db8973194 audit: efficiency... |
842 |
|
5b52330bb audit: fix auditd... |
843 844 845 846 |
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... |
847 |
* multicast send and move the record to the hold queue */ |
264d50963 audit: make sure ... |
848 849 |
rc = kauditd_send_queue(sk, portid, &audit_queue, 1, kauditd_send_multicast_skb, |
c81be52a3 audit: fix a race... |
850 851 852 853 |
(sk ? kauditd_retry_skb : kauditd_hold_skb)); if (ac && rc < 0) auditd_reset(ac); |
264d50963 audit: make sure ... |
854 |
sk = NULL; |
5b52330bb audit: fix auditd... |
855 856 857 858 859 |
/* drop our netns reference, no auditd sends past this line */ if (net) { put_net(net); net = NULL; |
3320c5133 audit: flatten ka... |
860 |
} |
5b52330bb audit: fix auditd... |
861 862 863 864 865 866 867 868 869 870 |
/* 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... |
871 |
} |
c6480207f audit: rework the... |
872 |
|
4899b8b16 [PATCH] kauditd_t... |
873 |
return 0; |
b7d112581 AUDIT: Send netli... |
874 |
} |
9044e6bca [PATCH] fix deadl... |
875 876 877 |
int audit_send_list(void *_dest) { struct audit_netlink_list *dest = _dest; |
9044e6bca [PATCH] fix deadl... |
878 |
struct sk_buff *skb; |
5b52330bb audit: fix auditd... |
879 |
struct sock *sk = audit_get_sk(dest->net); |
9044e6bca [PATCH] fix deadl... |
880 881 |
/* wait for parent to finish and send an ACK */ |
ce423631c audit: track the ... |
882 883 |
audit_ctl_lock(); audit_ctl_unlock(); |
9044e6bca [PATCH] fix deadl... |
884 885 |
while ((skb = __skb_dequeue(&dest->q)) != NULL) |
5b52330bb audit: fix auditd... |
886 |
netlink_unicast(sk, skb, dest->portid, 0); |
9044e6bca [PATCH] fix deadl... |
887 |
|
5b52330bb audit: fix auditd... |
888 |
put_net(dest->net); |
9044e6bca [PATCH] fix deadl... |
889 890 891 892 |
kfree(dest); return 0; } |
45a0642b4 audit: kernel gen... |
893 |
struct sk_buff *audit_make_reply(int seq, int type, int done, |
b8800aa5d audit: make funct... |
894 |
int multi, const void *payload, int size) |
9044e6bca [PATCH] fix deadl... |
895 896 897 |
{ struct sk_buff *skb; struct nlmsghdr *nlh; |
9044e6bca [PATCH] fix deadl... |
898 899 900 |
void *data; int flags = multi ? NLM_F_MULTI : 0; int t = done ? NLMSG_DONE : type; |
ee080e6ce Audit: cleanup ne... |
901 |
skb = nlmsg_new(size, GFP_KERNEL); |
9044e6bca [PATCH] fix deadl... |
902 903 |
if (!skb) return NULL; |
45a0642b4 audit: kernel gen... |
904 |
nlh = nlmsg_put(skb, 0, seq, t, size, flags); |
c64e66c67 audit: netlink: M... |
905 906 907 |
if (!nlh) goto out_kfree_skb; data = nlmsg_data(nlh); |
9044e6bca [PATCH] fix deadl... |
908 909 |
memcpy(data, payload, size); return skb; |
c64e66c67 audit: netlink: M... |
910 911 |
out_kfree_skb: kfree_skb(skb); |
9044e6bca [PATCH] fix deadl... |
912 913 |
return NULL; } |
f09ac9db2 Audit: stop deadl... |
914 915 916 |
static int audit_send_reply_thread(void *arg) { struct audit_reply *reply = (struct audit_reply *)arg; |
5b52330bb audit: fix auditd... |
917 |
struct sock *sk = audit_get_sk(reply->net); |
f09ac9db2 Audit: stop deadl... |
918 |
|
ce423631c audit: track the ... |
919 920 |
audit_ctl_lock(); audit_ctl_unlock(); |
f09ac9db2 Audit: stop deadl... |
921 922 923 |
/* Ignore failure. It'll only happen if the sender goes away, because our timeout is set to infinite. */ |
5b52330bb audit: fix auditd... |
924 925 |
netlink_unicast(sk, reply->skb, reply->portid, 0); put_net(reply->net); |
f09ac9db2 Audit: stop deadl... |
926 927 928 |
kfree(reply); return 0; } |
c6480207f audit: rework the... |
929 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
930 931 |
/** * audit_send_reply - send an audit reply message via netlink |
d211f177b audit: Update kdo... |
932 |
* @request_skb: skb of request we are replying to (used to target the reply) |
b0dd25a82 [PATCH] AUDIT: ke... |
933 934 935 936 937 938 939 |
* @seq: sequence number * @type: audit message type * @done: done (last) flag * @multi: multi-part message flag * @payload: payload data * @size: payload size * |
f9441639e audit: fix netlin... |
940 |
* Allocates an skb, builds the netlink message, and sends it to the port id. |
b0dd25a82 [PATCH] AUDIT: ke... |
941 942 |
* No failure notifications. */ |
6f285b19d audit: Send repli... |
943 |
static void audit_send_reply(struct sk_buff *request_skb, int seq, int type, int done, |
f9441639e audit: fix netlin... |
944 |
int multi, const void *payload, int size) |
1da177e4c Linux-2.6.12-rc2 |
945 |
{ |
6f285b19d audit: Send repli... |
946 |
struct net *net = sock_net(NETLINK_CB(request_skb).sk); |
f09ac9db2 Audit: stop deadl... |
947 948 949 950 951 952 953 |
struct sk_buff *skb; struct task_struct *tsk; struct audit_reply *reply = kmalloc(sizeof(struct audit_reply), GFP_KERNEL); if (!reply) return; |
45a0642b4 audit: kernel gen... |
954 |
skb = audit_make_reply(seq, type, done, multi, payload, size); |
1da177e4c Linux-2.6.12-rc2 |
955 |
if (!skb) |
fcaf1eb86 [patch 1/1] audit... |
956 |
goto out; |
f09ac9db2 Audit: stop deadl... |
957 |
|
6f285b19d audit: Send repli... |
958 |
reply->net = get_net(net); |
45a0642b4 audit: kernel gen... |
959 |
reply->portid = NETLINK_CB(request_skb).portid; |
f09ac9db2 Audit: stop deadl... |
960 961 962 |
reply->skb = skb; tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply"); |
fcaf1eb86 [patch 1/1] audit... |
963 964 965 966 967 |
if (!IS_ERR(tsk)) return; kfree_skb(skb); out: kfree(reply); |
1da177e4c Linux-2.6.12-rc2 |
968 969 970 971 972 973 |
} /* * Check for appropriate CAP_AUDIT_ capabilities on incoming audit * control messages. */ |
c7bdb545d [NETLINK]: Encaps... |
974 |
static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type) |
1da177e4c Linux-2.6.12-rc2 |
975 976 |
{ int err = 0; |
5a3cb3b6c audit: allow user... |
977 |
/* Only support initial user namespace for now. */ |
aa4af831b AUDIT: Allow logi... |
978 979 980 981 982 983 984 985 986 987 |
/* * 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... |
988 |
if (current_user_ns() != &init_user_ns) |
aa4af831b AUDIT: Allow logi... |
989 |
return -ECONNREFUSED; |
34e36d8ec audit: Limit audi... |
990 |
|
1da177e4c Linux-2.6.12-rc2 |
991 |
switch (msg_type) { |
1da177e4c Linux-2.6.12-rc2 |
992 |
case AUDIT_LIST: |
1da177e4c Linux-2.6.12-rc2 |
993 994 |
case AUDIT_ADD: case AUDIT_DEL: |
189009091 audit: remove the... |
995 996 997 |
return -EOPNOTSUPP; case AUDIT_GET: case AUDIT_SET: |
b0fed4021 audit: implement ... |
998 999 |
case AUDIT_GET_FEATURE: case AUDIT_SET_FEATURE: |
189009091 audit: remove the... |
1000 1001 |
case AUDIT_LIST_RULES: case AUDIT_ADD_RULE: |
93315ed6d [PATCH] audit str... |
1002 |
case AUDIT_DEL_RULE: |
c2f0c7c35 The attached patc... |
1003 |
case AUDIT_SIGNAL_INFO: |
522ed7767 Audit: add TTY in... |
1004 1005 |
case AUDIT_TTY_GET: case AUDIT_TTY_SET: |
74c3cbe33 [PATCH] audit: wa... |
1006 1007 |
case AUDIT_TRIM: case AUDIT_MAKE_EQUIV: |
5a3cb3b6c audit: allow user... |
1008 1009 |
/* Only support auditd and auditctl in initial pid namespace * for now. */ |
5985de675 audit: code clean up |
1010 |
if (task_active_pid_ns(current) != &init_pid_ns) |
5a3cb3b6c audit: allow user... |
1011 |
return -EPERM; |
90f62cf30 net: Use netlink_... |
1012 |
if (!netlink_capable(skb, CAP_AUDIT_CONTROL)) |
1da177e4c Linux-2.6.12-rc2 |
1013 1014 |
err = -EPERM; break; |
05474106a AUDIT: Fix AVC_US... |
1015 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
1016 1017 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
90f62cf30 net: Use netlink_... |
1018 |
if (!netlink_capable(skb, CAP_AUDIT_WRITE)) |
1da177e4c Linux-2.6.12-rc2 |
1019 1020 1021 1022 1023 1024 1025 1026 |
err = -EPERM; break; default: /* bad msg */ err = -EINVAL; } return err; } |
233a68667 audit: make audit... |
1027 |
static void audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) |
50397bd1e [AUDIT] clean up ... |
1028 |
{ |
dc9eb698f audit: stop pushi... |
1029 |
uid_t uid = from_kuid(&init_user_ns, current_uid()); |
f1dc4867f audit: anchor all... |
1030 |
pid_t pid = task_tgid_nr(current); |
50397bd1e [AUDIT] clean up ... |
1031 |
|
0868a5e15 audit: printk USE... |
1032 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) { |
50397bd1e [AUDIT] clean up ... |
1033 |
*ab = NULL; |
233a68667 audit: make audit... |
1034 |
return; |
50397bd1e [AUDIT] clean up ... |
1035 1036 1037 |
} *ab = audit_log_start(NULL, GFP_KERNEL, msg_type); |
0644ec0cc audit: catch poss... |
1038 |
if (unlikely(!*ab)) |
233a68667 audit: make audit... |
1039 |
return; |
f1dc4867f audit: anchor all... |
1040 |
audit_log_format(*ab, "pid=%d uid=%u", pid, uid); |
4d3fb709b helper for some s... |
1041 |
audit_log_session_info(*ab); |
b122c3767 audit: use a cons... |
1042 |
audit_log_task_context(*ab); |
50397bd1e [AUDIT] clean up ... |
1043 |
} |
b0fed4021 audit: implement ... |
1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 |
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... |
1055 |
audit_send_reply(skb, seq, AUDIT_GET_FEATURE, 0, 0, &af, sizeof(af)); |
b0fed4021 audit: implement ... |
1056 1057 1058 1059 1060 1061 1062 1063 |
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... |
1064 1065 |
if (audit_enabled == AUDIT_OFF) return; |
cdfb6b341 audit: use inline... |
1066 |
ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_FEATURE_CHANGE); |
23138ead2 audit: return on ... |
1067 1068 |
if (!ab) return; |
ad2ac2632 audit: log task i... |
1069 |
audit_log_task_info(ab, current); |
897f1acbb audit: AUDIT_FEAT... |
1070 |
audit_log_format(ab, " feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d", |
b0fed4021 audit: implement ... |
1071 1072 1073 1074 1075 1076 1077 1078 1079 |
audit_feature_names[which], !!old_feature, !!new_feature, !!old_lock, !!new_lock, res); audit_log_end(ab); } static int audit_set_feature(struct sk_buff *skb) { struct audit_features *uaf; int i; |
6eed9b261 kernel/audit.c: u... |
1080 |
BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names)); |
b0fed4021 audit: implement ... |
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 |
uaf = nlmsg_data(nlmsg_hdr(skb)); /* 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... |
1099 |
if (old_lock && (new_feature != old_feature)) { |
b0fed4021 audit: implement ... |
1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 |
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 ... |
1132 |
static int audit_replace(struct pid *pid) |
133e1e5ac audit: stop an ol... |
1133 |
{ |
b6c7c115c audit: store the ... |
1134 |
pid_t pvnr; |
5b52330bb audit: fix auditd... |
1135 |
struct sk_buff *skb; |
133e1e5ac audit: stop an ol... |
1136 |
|
b6c7c115c audit: store the ... |
1137 1138 |
pvnr = pid_vnr(pid); skb = audit_make_reply(0, AUDIT_REPLACE, 0, 0, &pvnr, sizeof(pvnr)); |
133e1e5ac audit: stop an ol... |
1139 1140 |
if (!skb) return -ENOMEM; |
5b52330bb audit: fix auditd... |
1141 |
return auditd_send_unicast_skb(skb); |
133e1e5ac audit: stop an ol... |
1142 |
} |
1da177e4c Linux-2.6.12-rc2 |
1143 1144 |
static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { |
dc9eb698f audit: stop pushi... |
1145 |
u32 seq; |
1da177e4c Linux-2.6.12-rc2 |
1146 |
void *data; |
1da177e4c Linux-2.6.12-rc2 |
1147 |
int err; |
c04049939 AUDIT: Add messag... |
1148 |
struct audit_buffer *ab; |
1da177e4c Linux-2.6.12-rc2 |
1149 |
u16 msg_type = nlh->nlmsg_type; |
e1396065e [PATCH] collect s... |
1150 |
struct audit_sig_info *sig_data; |
50397bd1e [AUDIT] clean up ... |
1151 |
char *ctx = NULL; |
e1396065e [PATCH] collect s... |
1152 |
u32 len; |
1da177e4c Linux-2.6.12-rc2 |
1153 |
|
c7bdb545d [NETLINK]: Encaps... |
1154 |
err = audit_netlink_ok(skb, msg_type); |
1da177e4c Linux-2.6.12-rc2 |
1155 1156 |
if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
1157 |
seq = nlh->nlmsg_seq; |
c64e66c67 audit: netlink: M... |
1158 |
data = nlmsg_data(nlh); |
1da177e4c Linux-2.6.12-rc2 |
1159 1160 |
switch (msg_type) { |
09f883a90 audit: clean up A... |
1161 1162 1163 1164 1165 |
case AUDIT_GET: { struct audit_status s; memset(&s, 0, sizeof(s)); s.enabled = audit_enabled; s.failure = audit_failure; |
b6c7c115c audit: store the ... |
1166 1167 |
/* NOTE: use pid_vnr() so the PID is relative to the current * namespace */ |
48d0e023a audit: fix the RC... |
1168 |
s.pid = auditd_pid_vnr(); |
09f883a90 audit: clean up A... |
1169 1170 1171 |
s.rate_limit = audit_rate_limit; s.backlog_limit = audit_backlog_limit; s.lost = atomic_read(&audit_lost); |
af8b824f2 audit: rename the... |
1172 |
s.backlog = skb_queue_len(&audit_queue); |
0288d7183 audit: convert st... |
1173 |
s.feature_bitmap = AUDIT_FEATURE_BITMAP_ALL; |
319754248 audit: rework aud... |
1174 |
s.backlog_wait_time = audit_backlog_wait_time; |
6f285b19d audit: Send repli... |
1175 |
audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &s, sizeof(s)); |
1da177e4c Linux-2.6.12-rc2 |
1176 |
break; |
09f883a90 audit: clean up A... |
1177 1178 1179 1180 1181 1182 1183 1184 |
} case AUDIT_SET: { struct audit_status s; memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh))); if (s.mask & AUDIT_STATUS_ENABLED) { err = audit_set_enabled(s.enabled); |
20c6aaa39 [PATCH] Fix the b... |
1185 1186 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
1187 |
} |
09f883a90 audit: clean up A... |
1188 1189 |
if (s.mask & AUDIT_STATUS_FAILURE) { err = audit_set_failure(s.failure); |
20c6aaa39 [PATCH] Fix the b... |
1190 1191 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
1192 |
} |
09f883a90 audit: clean up A... |
1193 |
if (s.mask & AUDIT_STATUS_PID) { |
b6c7c115c audit: store the ... |
1194 1195 1196 1197 1198 1199 1200 |
/* 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... |
1201 |
pid_t auditd_pid; |
b6c7c115c audit: store the ... |
1202 |
struct pid *req_pid = task_tgid(current); |
33e8a9078 audit: Allow audi... |
1203 1204 1205 |
/* 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 ... |
1206 |
return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
1207 |
|
5b52330bb audit: fix auditd... |
1208 |
/* test the auditd connection */ |
b6c7c115c audit: store the ... |
1209 |
audit_replace(req_pid); |
5b52330bb audit: fix auditd... |
1210 |
|
48d0e023a audit: fix the RC... |
1211 |
auditd_pid = auditd_pid_vnr(); |
33e8a9078 audit: Allow audi... |
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 |
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... |
1225 |
} |
5b52330bb audit: fix auditd... |
1226 |
|
533c7b69c audit: use proper... |
1227 |
if (new_pid) { |
5b52330bb audit: fix auditd... |
1228 |
/* register a new auditd connection */ |
48d0e023a audit: fix the RC... |
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 |
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... |
1239 1240 |
/* try to process any backlog */ wake_up_interruptible(&kauditd_wait); |
48d0e023a audit: fix the RC... |
1241 1242 1243 1244 1245 |
} else { if (audit_enabled != AUDIT_OFF) audit_log_config_change("audit_pid", new_pid, auditd_pid, 1); |
5b52330bb audit: fix auditd... |
1246 |
/* unregister the auditd connection */ |
c81be52a3 audit: fix a race... |
1247 |
auditd_reset(NULL); |
48d0e023a audit: fix the RC... |
1248 |
} |
1da177e4c Linux-2.6.12-rc2 |
1249 |
} |
09f883a90 audit: clean up A... |
1250 1251 |
if (s.mask & AUDIT_STATUS_RATE_LIMIT) { err = audit_set_rate_limit(s.rate_limit); |
20c6aaa39 [PATCH] Fix the b... |
1252 1253 1254 |
if (err < 0) return err; } |
51cc83f02 audit: add audit_... |
1255 |
if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) { |
09f883a90 audit: clean up A... |
1256 |
err = audit_set_backlog_limit(s.backlog_limit); |
51cc83f02 audit: add audit_... |
1257 1258 1259 |
if (err < 0) return err; } |
3f0c5fad8 audit: remove nee... |
1260 1261 1262 |
if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) { if (sizeof(s) > (size_t)nlh->nlmsg_len) return -EINVAL; |
724e7bfcc audit: Remove con... |
1263 |
if (s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME) |
3f0c5fad8 audit: remove nee... |
1264 1265 1266 1267 |
return -EINVAL; err = audit_set_backlog_wait_time(s.backlog_wait_time); if (err < 0) return err; |
51cc83f02 audit: add audit_... |
1268 |
} |
92c82e8a3 audit: add featur... |
1269 1270 1271 1272 1273 1274 |
if (s.mask == AUDIT_STATUS_LOST) { u32 lost = atomic_xchg(&audit_lost, 0); audit_log_config_change("lost", 0, lost, 1); return lost; } |
1da177e4c Linux-2.6.12-rc2 |
1275 |
break; |
09f883a90 audit: clean up A... |
1276 |
} |
b0fed4021 audit: implement ... |
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 |
case AUDIT_GET_FEATURE: err = audit_get_feature(skb); if (err) return err; break; case AUDIT_SET_FEATURE: err = audit_set_feature(skb); if (err) return err; break; |
05474106a AUDIT: Fix AVC_US... |
1287 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
1288 1289 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
4a4cd633b AUDIT: Optimise t... |
1290 1291 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) return 0; |
86b2efbe3 audit: add fields... |
1292 |
err = audit_filter(msg_type, AUDIT_FILTER_USER); |
724e4fcc8 audit: log on err... |
1293 |
if (err == 1) { /* match or error */ |
4a4cd633b AUDIT: Optimise t... |
1294 |
err = 0; |
522ed7767 Audit: add TTY in... |
1295 |
if (msg_type == AUDIT_USER_TTY) { |
37282a779 tty: audit: Combi... |
1296 |
err = tty_audit_push(); |
522ed7767 Audit: add TTY in... |
1297 1298 1299 |
if (err) break; } |
dc9eb698f audit: stop pushi... |
1300 |
audit_log_common_recv_msg(&ab, msg_type); |
50397bd1e [AUDIT] clean up ... |
1301 |
if (msg_type != AUDIT_USER_TTY) |
b50eba7e2 audit: format use... |
1302 1303 |
audit_log_format(ab, " msg='%.*s'", AUDIT_MESSAGE_TEXT_MAX, |
50397bd1e [AUDIT] clean up ... |
1304 1305 1306 |
(char *)data); else { int size; |
f7616102d audit: use data= ... |
1307 |
audit_log_format(ab, " data="); |
50397bd1e [AUDIT] clean up ... |
1308 |
size = nlmsg_len(nlh); |
55ad2f8d3 audit: ignore ter... |
1309 1310 1311 |
if (size > 0 && ((unsigned char *)data)[size - 1] == '\0') size--; |
b556f8ad5 Audit: standardiz... |
1312 |
audit_log_n_untrustedstring(ab, data, size); |
4a4cd633b AUDIT: Optimise t... |
1313 |
} |
50397bd1e [AUDIT] clean up ... |
1314 |
audit_log_end(ab); |
0f45aa18e AUDIT: Allow filt... |
1315 |
} |
1da177e4c Linux-2.6.12-rc2 |
1316 |
break; |
93315ed6d [PATCH] audit str... |
1317 1318 1319 1320 |
case AUDIT_ADD_RULE: case AUDIT_DEL_RULE: if (nlmsg_len(nlh) < sizeof(struct audit_rule_data)) return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
1321 |
if (audit_enabled == AUDIT_LOCKED) { |
dc9eb698f audit: stop pushi... |
1322 1323 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); audit_log_format(ab, " audit_enabled=%d res=0", audit_enabled); |
50397bd1e [AUDIT] clean up ... |
1324 |
audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
1325 1326 |
return -EPERM; } |
45a0642b4 audit: kernel gen... |
1327 |
err = audit_rule_change(msg_type, seq, data, nlmsg_len(nlh)); |
1da177e4c Linux-2.6.12-rc2 |
1328 |
break; |
ce0d9f046 audit: refactor a... |
1329 |
case AUDIT_LIST_RULES: |
6f285b19d audit: Send repli... |
1330 |
err = audit_list_rules_send(skb, seq); |
ce0d9f046 audit: refactor a... |
1331 |
break; |
74c3cbe33 [PATCH] audit: wa... |
1332 1333 |
case AUDIT_TRIM: audit_trim_trees(); |
dc9eb698f audit: stop pushi... |
1334 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
74c3cbe33 [PATCH] audit: wa... |
1335 1336 1337 1338 1339 1340 |
audit_log_format(ab, " op=trim res=1"); audit_log_end(ab); break; case AUDIT_MAKE_EQUIV: { void *bufp = data; u32 sizes[2]; |
7719e437f [PATCH 2/2] audit... |
1341 |
size_t msglen = nlmsg_len(nlh); |
74c3cbe33 [PATCH] audit: wa... |
1342 1343 1344 |
char *old, *new; err = -EINVAL; |
7719e437f [PATCH 2/2] audit... |
1345 |
if (msglen < 2 * sizeof(u32)) |
74c3cbe33 [PATCH] audit: wa... |
1346 1347 1348 |
break; memcpy(sizes, bufp, 2 * sizeof(u32)); bufp += 2 * sizeof(u32); |
7719e437f [PATCH 2/2] audit... |
1349 1350 |
msglen -= 2 * sizeof(u32); old = audit_unpack_string(&bufp, &msglen, sizes[0]); |
74c3cbe33 [PATCH] audit: wa... |
1351 1352 1353 1354 |
if (IS_ERR(old)) { err = PTR_ERR(old); break; } |
7719e437f [PATCH 2/2] audit... |
1355 |
new = audit_unpack_string(&bufp, &msglen, sizes[1]); |
74c3cbe33 [PATCH] audit: wa... |
1356 1357 1358 1359 1360 1361 1362 |
if (IS_ERR(new)) { err = PTR_ERR(new); kfree(old); break; } /* OK, here comes... */ err = audit_tag_tree(old, new); |
dc9eb698f audit: stop pushi... |
1363 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
50397bd1e [AUDIT] clean up ... |
1364 |
|
74c3cbe33 [PATCH] audit: wa... |
1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 |
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... |
1375 |
case AUDIT_SIGNAL_INFO: |
939cbf260 Audit: send signa... |
1376 1377 1378 1379 1380 1381 |
len = 0; if (audit_sig_sid) { err = security_secid_to_secctx(audit_sig_sid, &ctx, &len); if (err) return err; } |
e1396065e [PATCH] collect s... |
1382 1383 |
sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL); if (!sig_data) { |
939cbf260 Audit: send signa... |
1384 1385 |
if (audit_sig_sid) security_release_secctx(ctx, len); |
e1396065e [PATCH] collect s... |
1386 1387 |
return -ENOMEM; } |
cca080d9b userns: Convert a... |
1388 |
sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid); |
e1396065e [PATCH] collect s... |
1389 |
sig_data->pid = audit_sig_pid; |
939cbf260 Audit: send signa... |
1390 1391 1392 1393 |
if (audit_sig_sid) { memcpy(sig_data->ctx, ctx, len); security_release_secctx(ctx, len); } |
6f285b19d audit: Send repli... |
1394 1395 |
audit_send_reply(skb, seq, AUDIT_SIGNAL_INFO, 0, 0, sig_data, sizeof(*sig_data) + len); |
e1396065e [PATCH] collect s... |
1396 |
kfree(sig_data); |
c2f0c7c35 The attached patc... |
1397 |
break; |
522ed7767 Audit: add TTY in... |
1398 1399 |
case AUDIT_TTY_GET: { struct audit_tty_status s; |
2e28d38ae tty: audit: Handl... |
1400 |
unsigned int t; |
8aa14b649 audit: Simply AUD... |
1401 |
|
2e28d38ae tty: audit: Handl... |
1402 1403 1404 |
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... |
1405 |
|
6f285b19d audit: Send repli... |
1406 |
audit_send_reply(skb, seq, AUDIT_TTY_GET, 0, 0, &s, sizeof(s)); |
522ed7767 Audit: add TTY in... |
1407 1408 1409 |
break; } case AUDIT_TTY_SET: { |
a06e56b2a audit: log AUDIT_... |
1410 |
struct audit_tty_status s, old; |
a06e56b2a audit: log AUDIT_... |
1411 |
struct audit_buffer *ab; |
2e28d38ae tty: audit: Handl... |
1412 |
unsigned int t; |
0e23bacca audit: rework AUD... |
1413 1414 1415 1416 1417 1418 1419 1420 |
memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh))); /* 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_... |
1421 |
|
2e28d38ae tty: audit: Handl... |
1422 1423 1424 1425 1426 |
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... |
1427 |
} |
2e28d38ae tty: audit: Handl... |
1428 1429 |
old.enabled = t & AUDIT_TTY_ENABLE; old.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD); |
522ed7767 Audit: add TTY in... |
1430 |
|
a06e56b2a audit: log AUDIT_... |
1431 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
1ce319f11 audit: reorder AU... |
1432 1433 1434 1435 |
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_... |
1436 |
audit_log_end(ab); |
522ed7767 Audit: add TTY in... |
1437 1438 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
1439 1440 1441 1442 1443 1444 1445 |
default: err = -EINVAL; break; } return err < 0 ? err : 0; } |
a9d162087 audit: combine au... |
1446 1447 1448 1449 1450 1451 |
/** * 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... |
1452 |
*/ |
a9d162087 audit: combine au... |
1453 |
static void audit_receive(struct sk_buff *skb) |
1da177e4c Linux-2.6.12-rc2 |
1454 |
{ |
ea7ae60bf Audit: clean up a... |
1455 1456 |
struct nlmsghdr *nlh; /* |
941912133 audit: replace ob... |
1457 |
* len MUST be signed for nlmsg_next to be able to dec it below 0 |
ea7ae60bf Audit: clean up a... |
1458 1459 1460 1461 1462 1463 1464 |
* if the nlmsg_len was not aligned */ int len; int err; nlh = nlmsg_hdr(skb); len = skb->len; |
ce423631c audit: track the ... |
1465 |
audit_ctl_lock(); |
941912133 audit: replace ob... |
1466 |
while (nlmsg_ok(nlh, len)) { |
ea7ae60bf Audit: clean up a... |
1467 1468 1469 |
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... |
1470 |
netlink_ack(skb, nlh, err, NULL); |
ea7ae60bf Audit: clean up a... |
1471 |
|
2851da570 audit: pass int* ... |
1472 |
nlh = nlmsg_next(nlh, &len); |
1da177e4c Linux-2.6.12-rc2 |
1473 |
} |
ce423631c audit: track the ... |
1474 |
audit_ctl_unlock(); |
1da177e4c Linux-2.6.12-rc2 |
1475 |
} |
3a101b8de audit: add netlin... |
1476 |
/* Run custom bind function on netlink socket group connect or bind requests. */ |
023e2cfa3 netlink/genetlink... |
1477 |
static int audit_bind(struct net *net, int group) |
3a101b8de audit: add netlin... |
1478 1479 1480 1481 1482 1483 |
{ if (!capable(CAP_AUDIT_READ)) return -EPERM; return 0; } |
33faba7fa audit: listen in ... |
1484 |
static int __net_init audit_net_init(struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
1485 |
{ |
a31f2d17b netlink: add netl... |
1486 1487 |
struct netlink_kernel_cfg cfg = { .input = audit_receive, |
3a101b8de audit: add netlin... |
1488 |
.bind = audit_bind, |
451f92163 audit: add netlin... |
1489 1490 |
.flags = NL_CFG_F_NONROOT_RECV, .groups = AUDIT_NLGRP_MAX, |
a31f2d17b netlink: add netl... |
1491 |
}; |
f368c07d7 [PATCH] audit: pa... |
1492 |
|
33faba7fa audit: listen in ... |
1493 |
struct audit_net *aunet = net_generic(net, audit_net_id); |
5b52330bb audit: fix auditd... |
1494 1495 |
aunet->sk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg); if (aunet->sk == NULL) { |
33faba7fa audit: listen in ... |
1496 |
audit_panic("cannot initialize netlink socket in namespace"); |
11ee39ebf audit: print erro... |
1497 1498 |
return -ENOMEM; } |
5b52330bb audit: fix auditd... |
1499 |
aunet->sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; |
33faba7fa audit: listen in ... |
1500 1501 1502 1503 1504 1505 |
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... |
1506 |
|
48d0e023a audit: fix the RC... |
1507 1508 1509 1510 1511 |
/* 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 ... |
1512 |
|
5b52330bb audit: fix auditd... |
1513 |
netlink_kernel_release(aunet->sk); |
33faba7fa audit: listen in ... |
1514 |
} |
8626877b5 audit: fix locati... |
1515 |
static struct pernet_operations audit_net_ops __net_initdata = { |
33faba7fa audit: listen in ... |
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 |
.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... |
1526 1527 |
if (audit_initialized == AUDIT_DISABLED) return 0; |
8cc96382d audit: use kmem_c... |
1528 1529 1530 |
audit_buffer_cache = kmem_cache_create("audit_buffer", sizeof(struct audit_buffer), 0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1531 |
|
af8b824f2 audit: rename the... |
1532 |
skb_queue_head_init(&audit_queue); |
c6480207f audit: rework the... |
1533 |
skb_queue_head_init(&audit_retry_queue); |
af8b824f2 audit: rename the... |
1534 |
skb_queue_head_init(&audit_hold_queue); |
3dc7e3153 [PATCH] support f... |
1535 |
|
f368c07d7 [PATCH] audit: pa... |
1536 1537 |
for (i = 0; i < AUDIT_INODE_BUCKETS; i++) INIT_LIST_HEAD(&audit_inode_hash[i]); |
f368c07d7 [PATCH] audit: pa... |
1538 |
|
ce423631c audit: track the ... |
1539 1540 |
mutex_init(&audit_cmd_mutex.lock); audit_cmd_mutex.owner = NULL; |
5b52330bb audit: fix auditd... |
1541 1542 1543 1544 1545 1546 |
pr_info("initializing netlink subsys (%s) ", audit_default ? "enabled" : "disabled"); register_pernet_subsys(&audit_net_ops); audit_initialized = AUDIT_INITIALIZED; |
5b52330bb audit: fix auditd... |
1547 |
|
6c9255645 audit: fixup audi... |
1548 1549 1550 1551 1552 1553 |
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... |
1554 1555 1556 |
audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "state=initialized audit_enabled=%u res=1", audit_enabled); |
6c9255645 audit: fixup audi... |
1557 |
|
1da177e4c Linux-2.6.12-rc2 |
1558 1559 |
return 0; } |
be4104abf audit: initialize... |
1560 |
postcore_initcall(audit_init); |
1da177e4c Linux-2.6.12-rc2 |
1561 |
|
11dd26663 audit: do not pan... |
1562 1563 1564 1565 |
/* * Process kernel command-line parameter at boot time. * audit={0|off} or audit={1|on}. */ |
1da177e4c Linux-2.6.12-rc2 |
1566 1567 |
static int __init audit_enable(char *str) { |
11dd26663 audit: do not pan... |
1568 1569 1570 1571 1572 1573 1574 1575 1576 |
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 ... |
1577 1578 |
if (audit_default == AUDIT_OFF) |
a3f07114e [PATCH] Audit: ma... |
1579 |
audit_initialized = AUDIT_DISABLED; |
5d842a5b7 audit: use audit_... |
1580 |
if (audit_set_enabled(audit_default)) |
11dd26663 audit: do not pan... |
1581 1582 1583 |
pr_err("audit: error setting audit state (%d) ", audit_default); |
a3f07114e [PATCH] Audit: ma... |
1584 |
|
d957f7b72 audit: Use more c... |
1585 1586 |
pr_info("%s ", audit_default ? |
d3ca0344b audit: remove use... |
1587 |
"enabled (after initialization)" : "disabled (until reboot)"); |
a3f07114e [PATCH] Audit: ma... |
1588 |
|
9b41046cd [PATCH] Don't pas... |
1589 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
1590 |
} |
1da177e4c Linux-2.6.12-rc2 |
1591 |
__setup("audit=", audit_enable); |
f910fde73 audit: add kernel... |
1592 1593 1594 1595 |
/* 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... |
1596 |
u32 audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1597 |
|
f910fde73 audit: add kernel... |
1598 |
pr_info("audit_backlog_limit: "); |
3e1d0bb62 audit: Convert in... |
1599 1600 1601 |
if (kstrtouint(str, 0, &audit_backlog_limit_arg)) { pr_cont("using default of %u, unable to parse %s ", |
d957f7b72 audit: Use more c... |
1602 |
audit_backlog_limit, str); |
f910fde73 audit: add kernel... |
1603 1604 |
return 1; } |
3e1d0bb62 audit: Convert in... |
1605 1606 |
audit_backlog_limit = audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1607 1608 |
pr_cont("%d ", audit_backlog_limit); |
f910fde73 audit: add kernel... |
1609 1610 1611 1612 |
return 1; } __setup("audit_backlog_limit=", audit_backlog_limit_set); |
16e1904e6 AUDIT: Add helper... |
1613 1614 |
static void audit_buffer_free(struct audit_buffer *ab) { |
8fc6115c2 AUDIT: expand aud... |
1615 1616 |
if (!ab) return; |
d865e573b audit: Delete unn... |
1617 |
kfree_skb(ab->skb); |
8cc96382d audit: use kmem_c... |
1618 |
kmem_cache_free(audit_buffer_cache, ab); |
16e1904e6 AUDIT: Add helper... |
1619 |
} |
8cc96382d audit: use kmem_c... |
1620 1621 |
static struct audit_buffer *audit_buffer_alloc(struct audit_context *ctx, gfp_t gfp_mask, int type) |
16e1904e6 AUDIT: Add helper... |
1622 |
{ |
8cc96382d audit: use kmem_c... |
1623 |
struct audit_buffer *ab; |
8fc6115c2 AUDIT: expand aud... |
1624 |
|
8cc96382d audit: use kmem_c... |
1625 1626 1627 |
ab = kmem_cache_alloc(audit_buffer_cache, gfp_mask); if (!ab) return NULL; |
ee080e6ce Audit: cleanup ne... |
1628 1629 1630 |
ab->skb = nlmsg_new(AUDIT_BUFSIZ, gfp_mask); if (!ab->skb) |
c64e66c67 audit: netlink: M... |
1631 |
goto err; |
8cc96382d audit: use kmem_c... |
1632 1633 |
if (!nlmsg_put(ab->skb, 0, 0, type, 0, 0)) goto err; |
ee080e6ce Audit: cleanup ne... |
1634 |
|
8cc96382d audit: use kmem_c... |
1635 1636 |
ab->ctx = ctx; ab->gfp_mask = gfp_mask; |
ee080e6ce Audit: cleanup ne... |
1637 |
|
16e1904e6 AUDIT: Add helper... |
1638 |
return ab; |
ee080e6ce Audit: cleanup ne... |
1639 |
|
8fc6115c2 AUDIT: expand aud... |
1640 1641 1642 |
err: audit_buffer_free(ab); return NULL; |
16e1904e6 AUDIT: Add helper... |
1643 |
} |
1da177e4c Linux-2.6.12-rc2 |
1644 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1645 1646 1647 1648 |
/** * 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... |
1649 1650 1651 1652 1653 1654 1655 |
* 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... |
1656 1657 1658 1659 |
* 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... |
1660 1661 |
* halts). */ |
bfb4496e7 AUDIT: Assign ser... |
1662 1663 |
unsigned int audit_serial(void) { |
01478d7d6 audit: use atomic... |
1664 |
static atomic_t serial = ATOMIC_INIT(0); |
d5b454f2c AUDIT: Fix livelo... |
1665 |
|
01478d7d6 audit: use atomic... |
1666 |
return atomic_add_return(1, &serial); |
bfb4496e7 AUDIT: Assign ser... |
1667 |
} |
5600b8927 whitespace fixes:... |
1668 |
static inline void audit_get_stamp(struct audit_context *ctx, |
2115bb250 audit: Use timesp... |
1669 |
struct timespec64 *t, unsigned int *serial) |
bfb4496e7 AUDIT: Assign ser... |
1670 |
{ |
48887e63d [PATCH] fix broke... |
1671 |
if (!ctx || !auditsc_get_stamp(ctx, t, serial)) { |
290e44b7d audit: use ktime_... |
1672 |
ktime_get_coarse_real_ts64(t); |
bfb4496e7 AUDIT: Assign ser... |
1673 1674 1675 |
*serial = audit_serial(); } } |
b0dd25a82 [PATCH] AUDIT: ke... |
1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 |
/** * 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... |
1691 |
struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, |
9ad9ad385 AUDIT: Wait for b... |
1692 |
int type) |
1da177e4c Linux-2.6.12-rc2 |
1693 |
{ |
319754248 audit: rework aud... |
1694 |
struct audit_buffer *ab; |
2115bb250 audit: Use timesp... |
1695 |
struct timespec64 t; |
319754248 audit: rework aud... |
1696 |
unsigned int uninitialized_var(serial); |
1da177e4c Linux-2.6.12-rc2 |
1697 |
|
a3f07114e [PATCH] Audit: ma... |
1698 |
if (audit_initialized != AUDIT_INITIALIZED) |
1da177e4c Linux-2.6.12-rc2 |
1699 |
return NULL; |
d904ac032 audit: rename FIL... |
1700 |
if (unlikely(!audit_filter(type, AUDIT_FILTER_EXCLUDE))) |
c8edc80c8 [PATCH] Exclude m... |
1701 |
return NULL; |
5b52330bb audit: fix auditd... |
1702 |
/* NOTE: don't ever fail/sleep on these two conditions: |
a09cfa470 audit: don't ever... |
1703 1704 1705 1706 |
* 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... |
1707 1708 |
* 2. generator holding the audit_cmd_mutex - we don't want to block * while holding the mutex */ |
ce423631c audit: track the ... |
1709 |
if (!(auditd_test_task(current) || audit_ctl_owner_current())) { |
5b52330bb audit: fix auditd... |
1710 |
long stime = audit_backlog_wait_time; |
319754248 audit: rework aud... |
1711 1712 1713 1714 1715 |
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... |
1716 |
|
319754248 audit: rework aud... |
1717 1718 |
/* sleep if we are allowed and we haven't exhausted our * backlog wait limit */ |
5b52330bb audit: fix auditd... |
1719 |
if (gfpflags_allow_blocking(gfp_mask) && (stime > 0)) { |
319754248 audit: rework aud... |
1720 1721 1722 1723 1724 |
DECLARE_WAITQUEUE(wait, current); add_wait_queue_exclusive(&audit_backlog_wait, &wait); set_current_state(TASK_UNINTERRUPTIBLE); |
5b52330bb audit: fix auditd... |
1725 |
stime = schedule_timeout(stime); |
319754248 audit: rework aud... |
1726 1727 1728 1729 1730 1731 1732 1733 1734 |
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... |
1735 |
} |
9ad9ad385 AUDIT: Wait for b... |
1736 |
} |
fb19b4c6a AUDIT: Honour aud... |
1737 |
} |
9ad9ad385 AUDIT: Wait for b... |
1738 |
ab = audit_buffer_alloc(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
1739 1740 1741 1742 |
if (!ab) { audit_log_lost("out of memory in audit_log_start"); return NULL; } |
bfb4496e7 AUDIT: Assign ser... |
1743 |
audit_get_stamp(ab->ctx, &t, &serial); |
2115bb250 audit: Use timesp... |
1744 1745 |
audit_log_format(ab, "audit(%llu.%03lu:%u): ", (unsigned long long)t.tv_sec, t.tv_nsec/1000000, serial); |
319754248 audit: rework aud... |
1746 |
|
1da177e4c Linux-2.6.12-rc2 |
1747 1748 |
return ab; } |
8fc6115c2 AUDIT: expand aud... |
1749 |
/** |
5ac52f33b AUDIT: buffer aud... |
1750 |
* audit_expand - expand skb in the audit buffer |
8fc6115c2 AUDIT: expand aud... |
1751 |
* @ab: audit_buffer |
b0dd25a82 [PATCH] AUDIT: ke... |
1752 |
* @extra: space to add at tail of the skb |
8fc6115c2 AUDIT: expand aud... |
1753 1754 1755 1756 |
* * Returns 0 (no space) on failed expansion, or available space if * successful. */ |
e3b926b4c AUDIT: pass size ... |
1757 |
static inline int audit_expand(struct audit_buffer *ab, int extra) |
8fc6115c2 AUDIT: expand aud... |
1758 |
{ |
5ac52f33b AUDIT: buffer aud... |
1759 |
struct sk_buff *skb = ab->skb; |
406a1d868 [AUDIT]: Increase... |
1760 1761 1762 |
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... |
1763 1764 |
if (ret < 0) { audit_log_lost("out of memory in audit_expand"); |
8fc6115c2 AUDIT: expand aud... |
1765 |
return 0; |
5ac52f33b AUDIT: buffer aud... |
1766 |
} |
406a1d868 [AUDIT]: Increase... |
1767 1768 1769 |
skb->truesize += newtail - oldtail; return newtail; |
8fc6115c2 AUDIT: expand aud... |
1770 |
} |
1da177e4c Linux-2.6.12-rc2 |
1771 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1772 1773 |
/* * Format an audit message into the audit buffer. If there isn't enough |
1da177e4c Linux-2.6.12-rc2 |
1774 1775 |
* 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... |
1776 1777 |
* can't format message larger than 1024 bytes, so we don't either. */ |
1da177e4c Linux-2.6.12-rc2 |
1778 1779 1780 1781 |
static void audit_log_vformat(struct audit_buffer *ab, const char *fmt, va_list args) { int len, avail; |
5ac52f33b AUDIT: buffer aud... |
1782 |
struct sk_buff *skb; |
eecb0a733 AUDIT: Fix abuse ... |
1783 |
va_list args2; |
1da177e4c Linux-2.6.12-rc2 |
1784 1785 1786 |
if (!ab) return; |
5ac52f33b AUDIT: buffer aud... |
1787 1788 1789 1790 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); if (avail == 0) { |
e3b926b4c AUDIT: pass size ... |
1791 |
avail = audit_expand(ab, AUDIT_BUFSIZ); |
8fc6115c2 AUDIT: expand aud... |
1792 1793 |
if (!avail) goto out; |
1da177e4c Linux-2.6.12-rc2 |
1794 |
} |
eecb0a733 AUDIT: Fix abuse ... |
1795 |
va_copy(args2, args); |
27a884dc3 [SK_BUFF]: Conver... |
1796 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1797 1798 1799 1800 |
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... |
1801 1802 |
avail = audit_expand(ab, max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail)); |
8fc6115c2 AUDIT: expand aud... |
1803 |
if (!avail) |
a0e86bd42 audit: always fol... |
1804 |
goto out_va_end; |
27a884dc3 [SK_BUFF]: Conver... |
1805 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2); |
1da177e4c Linux-2.6.12-rc2 |
1806 |
} |
168b71739 AUDIT: Clean up l... |
1807 1808 |
if (len > 0) skb_put(skb, len); |
a0e86bd42 audit: always fol... |
1809 1810 |
out_va_end: va_end(args2); |
8fc6115c2 AUDIT: expand aud... |
1811 1812 |
out: return; |
1da177e4c Linux-2.6.12-rc2 |
1813 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
1814 1815 1816 1817 1818 1819 1820 1821 |
/** * 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 |
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 |
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... |
1832 |
/** |
196a50855 audit: update the... |
1833 |
* audit_log_n_hex - convert a buffer to hex and append it to the audit skb |
b0dd25a82 [PATCH] AUDIT: ke... |
1834 1835 1836 1837 1838 1839 1840 1841 1842 |
* @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... |
1843 |
void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf, |
168b71739 AUDIT: Clean up l... |
1844 |
size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1845 |
{ |
168b71739 AUDIT: Clean up l... |
1846 1847 1848 |
int i, avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
168b71739 AUDIT: Clean up l... |
1849 |
|
8ef2d3040 [PATCH] sanity ch... |
1850 1851 |
if (!ab) return; |
168b71739 AUDIT: Clean up l... |
1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 |
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 ... |
1863 |
|
27a884dc3 [SK_BUFF]: Conver... |
1864 |
ptr = skb_tail_pointer(skb); |
b8dbc3241 audit: Use hex_by... |
1865 1866 |
for (i = 0; i < len; i++) ptr = hex_byte_pack_upper(ptr, buf[i]); |
168b71739 AUDIT: Clean up l... |
1867 1868 |
*ptr = 0; skb_put(skb, len << 1); /* new string is twice the old string */ |
83c7d0917 AUDIT: Avoid log ... |
1869 |
} |
9c937dcc7 [PATCH] log more ... |
1870 1871 1872 1873 |
/* * Format a string of no more than slen characters into the audit buffer, * enclosed in quote marks. */ |
b556f8ad5 Audit: standardiz... |
1874 1875 |
void audit_log_n_string(struct audit_buffer *ab, const char *string, size_t slen) |
9c937dcc7 [PATCH] log more ... |
1876 1877 1878 1879 |
{ int avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
8ef2d3040 [PATCH] sanity ch... |
1880 1881 |
if (!ab) return; |
9c937dcc7 [PATCH] log more ... |
1882 1883 1884 1885 1886 1887 1888 1889 1890 |
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... |
1891 |
ptr = skb_tail_pointer(skb); |
9c937dcc7 [PATCH] log more ... |
1892 1893 1894 1895 1896 1897 1898 |
*ptr++ = '"'; memcpy(ptr, string, slen); ptr += slen; *ptr++ = '"'; *ptr = 0; skb_put(skb, slen + 2); /* don't include null terminator */ } |
b0dd25a82 [PATCH] AUDIT: ke... |
1899 |
/** |
de6bbd1d3 [AUDIT] break lar... |
1900 |
* audit_string_contains_control - does a string need to be logged in hex |
f706d5d22 audit: silence tw... |
1901 1902 |
* @string: string to be checked * @len: max length of the string to check |
de6bbd1d3 [AUDIT] break lar... |
1903 |
*/ |
9fcf836b2 audit: audit_stri... |
1904 |
bool audit_string_contains_control(const char *string, size_t len) |
de6bbd1d3 [AUDIT] break lar... |
1905 1906 |
{ const unsigned char *p; |
b3897f567 Audit: fix handli... |
1907 |
for (p = string; p < (const unsigned char *)string + len; p++) { |
1d6c9649e kernel/audit.c co... |
1908 |
if (*p == '"' || *p < 0x21 || *p > 0x7e) |
9fcf836b2 audit: audit_stri... |
1909 |
return true; |
de6bbd1d3 [AUDIT] break lar... |
1910 |
} |
9fcf836b2 audit: audit_stri... |
1911 |
return false; |
de6bbd1d3 [AUDIT] break lar... |
1912 1913 1914 |
} /** |
522ed7767 Audit: add TTY in... |
1915 |
* audit_log_n_untrustedstring - log a string that may contain random characters |
b0dd25a82 [PATCH] AUDIT: ke... |
1916 |
* @ab: audit_buffer |
f706d5d22 audit: silence tw... |
1917 |
* @len: length of string (not including trailing null) |
b0dd25a82 [PATCH] AUDIT: ke... |
1918 1919 1920 1921 |
* @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... |
1922 |
* or a space. Unescaped strings will start and end with a double quote mark. |
b0dd25a82 [PATCH] AUDIT: ke... |
1923 |
* Strings that are escaped are printed in hex (2 digits per char). |
9c937dcc7 [PATCH] log more ... |
1924 1925 1926 |
* * 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... |
1927 |
*/ |
b556f8ad5 Audit: standardiz... |
1928 1929 |
void audit_log_n_untrustedstring(struct audit_buffer *ab, const char *string, size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1930 |
{ |
de6bbd1d3 [AUDIT] break lar... |
1931 |
if (audit_string_contains_control(string, len)) |
b556f8ad5 Audit: standardiz... |
1932 |
audit_log_n_hex(ab, string, len); |
de6bbd1d3 [AUDIT] break lar... |
1933 |
else |
b556f8ad5 Audit: standardiz... |
1934 |
audit_log_n_string(ab, string, len); |
83c7d0917 AUDIT: Avoid log ... |
1935 |
} |
9c937dcc7 [PATCH] log more ... |
1936 |
/** |
522ed7767 Audit: add TTY in... |
1937 |
* audit_log_untrustedstring - log a string that may contain random characters |
9c937dcc7 [PATCH] log more ... |
1938 1939 1940 |
* @ab: audit_buffer * @string: string to be logged * |
522ed7767 Audit: add TTY in... |
1941 |
* Same as audit_log_n_untrustedstring(), except that strlen is used to |
9c937dcc7 [PATCH] log more ... |
1942 1943 |
* determine string length. */ |
de6bbd1d3 [AUDIT] break lar... |
1944 |
void audit_log_untrustedstring(struct audit_buffer *ab, const char *string) |
9c937dcc7 [PATCH] log more ... |
1945 |
{ |
b556f8ad5 Audit: standardiz... |
1946 |
audit_log_n_untrustedstring(ab, string, strlen(string)); |
9c937dcc7 [PATCH] log more ... |
1947 |
} |
168b71739 AUDIT: Clean up l... |
1948 |
/* This is a helper-function to print the escaped d_path */ |
1da177e4c Linux-2.6.12-rc2 |
1949 |
void audit_log_d_path(struct audit_buffer *ab, const char *prefix, |
66b3fad3f constify path arg... |
1950 |
const struct path *path) |
1da177e4c Linux-2.6.12-rc2 |
1951 |
{ |
44707fdf5 d_path: Use struc... |
1952 |
char *p, *pathname; |
1da177e4c Linux-2.6.12-rc2 |
1953 |
|
8fc6115c2 AUDIT: expand aud... |
1954 |
if (prefix) |
c158a35c8 audit: no leading... |
1955 |
audit_log_format(ab, "%s", prefix); |
1da177e4c Linux-2.6.12-rc2 |
1956 |
|
168b71739 AUDIT: Clean up l... |
1957 |
/* We will allow 11 spaces for ' (deleted)' to be appended */ |
44707fdf5 d_path: Use struc... |
1958 1959 |
pathname = kmalloc(PATH_MAX+11, ab->gfp_mask); if (!pathname) { |
def575434 Audit: remove spa... |
1960 |
audit_log_string(ab, "<no_memory>"); |
168b71739 AUDIT: Clean up l... |
1961 |
return; |
1da177e4c Linux-2.6.12-rc2 |
1962 |
} |
cf28b4863 d_path: Make d_pa... |
1963 |
p = d_path(path, pathname, PATH_MAX+11); |
168b71739 AUDIT: Clean up l... |
1964 1965 |
if (IS_ERR(p)) { /* Should never happen since we send PATH_MAX */ /* FIXME: can we save some information here? */ |
def575434 Audit: remove spa... |
1966 |
audit_log_string(ab, "<too_long>"); |
5600b8927 whitespace fixes:... |
1967 |
} else |
168b71739 AUDIT: Clean up l... |
1968 |
audit_log_untrustedstring(ab, p); |
44707fdf5 d_path: Use struc... |
1969 |
kfree(pathname); |
1da177e4c Linux-2.6.12-rc2 |
1970 |
} |
4d3fb709b helper for some s... |
1971 1972 |
void audit_log_session_info(struct audit_buffer *ab) { |
4440e8548 audit: convert al... |
1973 |
unsigned int sessionid = audit_get_sessionid(current); |
4d3fb709b helper for some s... |
1974 |
uid_t auid = from_kuid(&init_user_ns, audit_get_loginuid(current)); |
b8f89caaf audit: remove new... |
1975 |
audit_log_format(ab, " auid=%u ses=%u", auid, sessionid); |
4d3fb709b helper for some s... |
1976 |
} |
9d9609851 Audit: clean up a... |
1977 1978 1979 1980 1981 1982 1983 1984 |
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 ... |
1985 1986 1987 1988 1989 1990 1991 |
void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap) { int i; audit_log_format(ab, " %s=", prefix); CAP_FOR_EACH_U32(i) { audit_log_format(ab, "%08x", |
7d8b6c637 CAPABILITIES: rem... |
1992 |
cap->cap[CAP_LAST_U32 - i]); |
b24a30a73 audit: fix event ... |
1993 1994 |
} } |
691e6d59d audit: reduce sco... |
1995 |
static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name) |
b24a30a73 audit: fix event ... |
1996 |
{ |
4b3e4ed6b audit: unswing ca... |
1997 1998 1999 2000 |
audit_log_cap(ab, "cap_fp", &name->fcap.permitted); audit_log_cap(ab, "cap_fi", &name->fcap.inheritable); audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver); |
b24a30a73 audit: fix event ... |
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 |
} static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry) { struct cpu_vfs_cap_data caps; int rc; if (!dentry) return 0; rc = get_vfs_caps_from_disk(dentry, &caps); if (rc) return rc; name->fcap.permitted = caps.permitted; name->fcap.inheritable = caps.inheritable; name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE); name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT; return 0; } /* Copy inode data into an audit_names. */ void audit_copy_inode(struct audit_names *name, const struct dentry *dentry, |
d6335d77a security: Make in... |
2027 |
struct inode *inode) |
b24a30a73 audit: fix event ... |
2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 |
{ name->ino = inode->i_ino; name->dev = inode->i_sb->s_dev; name->mode = inode->i_mode; name->uid = inode->i_uid; name->gid = inode->i_gid; name->rdev = inode->i_rdev; security_inode_getsecid(inode, &name->osid); audit_copy_fcaps(name, dentry); } /** * audit_log_name - produce AUDIT_PATH record from struct audit_names * @context: audit_context for the task * @n: audit_names structure with reportable details * @path: optional path to report instead of audit_names->name * @record_num: record number to report when handling a list of names * @call_panic: optional pointer to int that will be updated if secid fails */ void audit_log_name(struct audit_context *context, struct audit_names *n, |
8bd107633 audit_log_{name,l... |
2048 |
const struct path *path, int record_num, int *call_panic) |
b24a30a73 audit: fix event ... |
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 |
{ struct audit_buffer *ab; ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH); if (!ab) return; audit_log_format(ab, "item=%d", record_num); if (path) audit_log_d_path(ab, " name=", path); else if (n->name) { switch (n->name_len) { case AUDIT_NAME_FULL: /* log the full path */ audit_log_format(ab, " name="); audit_log_untrustedstring(ab, n->name->name); break; case 0: /* name was specified as a relative path and the * directory component is the cwd */ audit_log_d_path(ab, " name=", &context->pwd); break; default: /* log the name's directory component */ audit_log_format(ab, " name="); audit_log_n_untrustedstring(ab, n->name->name, n->name_len); } } else audit_log_format(ab, " name=(null)"); |
425afcff1 Merge branch 'ups... |
2079 |
if (n->ino != AUDIT_INO_UNSET) |
b24a30a73 audit: fix event ... |
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 |
audit_log_format(ab, " inode=%lu" " dev=%02x:%02x mode=%#ho" " ouid=%u ogid=%u rdev=%02x:%02x", n->ino, MAJOR(n->dev), MINOR(n->dev), n->mode, from_kuid(&init_user_ns, n->uid), from_kgid(&init_user_ns, n->gid), MAJOR(n->rdev), MINOR(n->rdev)); |
b24a30a73 audit: fix event ... |
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 |
if (n->osid != 0) { char *ctx = NULL; u32 len; if (security_secid_to_secctx( n->osid, &ctx, &len)) { audit_log_format(ab, " osid=%u", n->osid); if (call_panic) *call_panic = 2; } else { audit_log_format(ab, " obj=%s", ctx); security_release_secctx(ctx, len); } } |
d3aea84a4 audit: log the au... |
2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 |
/* log the audit_names record type */ audit_log_format(ab, " nametype="); switch(n->type) { case AUDIT_TYPE_NORMAL: audit_log_format(ab, "NORMAL"); break; case AUDIT_TYPE_PARENT: audit_log_format(ab, "PARENT"); break; case AUDIT_TYPE_CHILD_DELETE: audit_log_format(ab, "DELETE"); break; case AUDIT_TYPE_CHILD_CREATE: audit_log_format(ab, "CREATE"); break; default: audit_log_format(ab, "UNKNOWN"); break; } |
b24a30a73 audit: fix event ... |
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 |
audit_log_fcaps(ab, n); audit_log_end(ab); } int audit_log_task_context(struct audit_buffer *ab) { char *ctx = NULL; unsigned len; int error; u32 sid; security_task_getsecid(current, &sid); 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... |
2154 2155 2156 |
void audit_log_d_path_exe(struct audit_buffer *ab, struct mm_struct *mm) { |
5b2825527 audit: reduce mma... |
2157 2158 2159 2160 |
struct file *exe_file; if (!mm) goto out_null; |
4766b199e audit: consolidat... |
2161 |
|
5b2825527 audit: reduce mma... |
2162 2163 2164 2165 2166 2167 2168 2169 2170 |
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... |
2171 |
} |
3f5be2da8 audit: move audit... |
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 |
struct tty_struct *audit_get_tty(struct task_struct *tsk) { struct tty_struct *tty = NULL; unsigned long flags; spin_lock_irqsave(&tsk->sighand->siglock, flags); if (tsk->signal) tty = tty_kref_get(tsk->signal->tty); spin_unlock_irqrestore(&tsk->sighand->siglock, flags); return tty; } void audit_put_tty(struct tty_struct *tty) { tty_kref_put(tty); } |
b24a30a73 audit: fix event ... |
2188 2189 2190 |
void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) { const struct cred *cred; |
9eab339b1 audit: get comm u... |
2191 |
char comm[sizeof(tsk->comm)]; |
db0a6fb5d audit: add tty fi... |
2192 |
struct tty_struct *tty; |
b24a30a73 audit: fix event ... |
2193 2194 2195 2196 2197 2198 |
if (!ab) return; /* tsk == current */ cred = current_cred(); |
db0a6fb5d audit: add tty fi... |
2199 |
tty = audit_get_tty(tsk); |
b24a30a73 audit: fix event ... |
2200 |
audit_log_format(ab, |
c92cdeb45 audit: convert PP... |
2201 |
" ppid=%d pid=%d auid=%u uid=%u gid=%u" |
b24a30a73 audit: fix event ... |
2202 |
" euid=%u suid=%u fsuid=%u" |
2f2ad1013 audit: restore or... |
2203 |
" egid=%u sgid=%u fsgid=%u tty=%s ses=%u", |
c92cdeb45 audit: convert PP... |
2204 |
task_ppid_nr(tsk), |
fa2bea2f5 audit: consistent... |
2205 |
task_tgid_nr(tsk), |
b24a30a73 audit: fix event ... |
2206 2207 2208 2209 2210 2211 2212 2213 2214 |
from_kuid(&init_user_ns, audit_get_loginuid(tsk)), 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... |
2215 2216 2217 |
tty ? tty_name(tty) : "(none)", audit_get_sessionid(tsk)); audit_put_tty(tty); |
b24a30a73 audit: fix event ... |
2218 |
audit_log_format(ab, " comm="); |
9eab339b1 audit: get comm u... |
2219 |
audit_log_untrustedstring(ab, get_task_comm(comm, tsk)); |
4766b199e audit: consolidat... |
2220 |
audit_log_d_path_exe(ab, tsk->mm); |
b24a30a73 audit: fix event ... |
2221 2222 2223 |
audit_log_task_context(ab); } EXPORT_SYMBOL(audit_log_task_info); |
b0dd25a82 [PATCH] AUDIT: ke... |
2224 |
/** |
a51d9eaa4 fs: add link rest... |
2225 |
* audit_log_link_denied - report a link restriction denial |
220119647 audit: fix for ty... |
2226 |
* @operation: specific link operation |
a51d9eaa4 fs: add link rest... |
2227 |
*/ |
94b9d9b7a audit: remove pat... |
2228 |
void audit_log_link_denied(const char *operation) |
a51d9eaa4 fs: add link rest... |
2229 2230 |
{ struct audit_buffer *ab; |
b24a30a73 audit: fix event ... |
2231 |
|
15564ff0a audit: make ANOM_... |
2232 |
if (!audit_enabled || audit_dummy_context()) |
b24a30a73 audit: fix event ... |
2233 |
return; |
a51d9eaa4 fs: add link rest... |
2234 |
|
b24a30a73 audit: fix event ... |
2235 |
/* Generate AUDIT_ANOM_LINK with subject, operation, outcome. */ |
cdfb6b341 audit: use inline... |
2236 |
ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_ANOM_LINK); |
d1c7d97ad fs: handle failed... |
2237 |
if (!ab) |
45b578fe4 audit: link denie... |
2238 |
return; |
b24a30a73 audit: fix event ... |
2239 2240 2241 |
audit_log_format(ab, "op=%s", operation); audit_log_task_info(ab, current); audit_log_format(ab, " res=0"); |
a51d9eaa4 fs: add link rest... |
2242 2243 2244 2245 |
audit_log_end(ab); } /** |
b0dd25a82 [PATCH] AUDIT: ke... |
2246 2247 2248 |
* audit_log_end - end one audit record * @ab: the audit_buffer * |
4aa83872d audit: queue netl... |
2249 2250 2251 2252 |
* 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 * queue and a tasklet is scheduled to remove them from the queue outside the * irq context. May be called in any context. |
b0dd25a82 [PATCH] AUDIT: ke... |
2253 |
*/ |
b7d112581 AUDIT: Send netli... |
2254 |
void audit_log_end(struct audit_buffer *ab) |
1da177e4c Linux-2.6.12-rc2 |
2255 |
{ |
5b52330bb audit: fix auditd... |
2256 2257 |
struct sk_buff *skb; struct nlmsghdr *nlh; |
1da177e4c Linux-2.6.12-rc2 |
2258 2259 |
if (!ab) return; |
5b52330bb audit: fix auditd... |
2260 2261 2262 |
if (audit_rate_check()) { skb = ab->skb; |
f3d357b09 Audit: save audit... |
2263 |
ab->skb = NULL; |
5b52330bb audit: fix auditd... |
2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 |
/* 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... |
2275 |
audit_buffer_free(ab); |
1da177e4c Linux-2.6.12-rc2 |
2276 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 |
/** * 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:... |
2289 |
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type, |
9ad9ad385 AUDIT: Wait for b... |
2290 |
const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
2291 2292 2293 |
{ struct audit_buffer *ab; va_list args; |
9ad9ad385 AUDIT: Wait for b... |
2294 |
ab = audit_log_start(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
2295 2296 2297 2298 2299 2300 2301 |
if (ab) { va_start(args, fmt); audit_log_vformat(ab, fmt, args); va_end(args); audit_log_end(ab); } } |
bf45da97a [PATCH] EXPORT_SY... |
2302 2303 2304 2305 2306 |
EXPORT_SYMBOL(audit_log_start); EXPORT_SYMBOL(audit_log_end); EXPORT_SYMBOL(audit_log_format); EXPORT_SYMBOL(audit_log); |