Blame view
kernel/audit.c
62.2 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. * |
85c8721ff audit: update poi... |
41 |
* Example user-space utilities: http://people.redhat.com/sgrubb/audit/ |
1da177e4c Linux-2.6.12-rc2 |
42 |
*/ |
d957f7b72 audit: Use more c... |
43 |
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
5b2825527 audit: reduce mma... |
44 |
#include <linux/file.h> |
1da177e4c Linux-2.6.12-rc2 |
45 |
#include <linux/init.h> |
7153e4027 ipc, kernel: use ... |
46 |
#include <linux/types.h> |
60063497a atomic: use <linu... |
47 |
#include <linux/atomic.h> |
1da177e4c Linux-2.6.12-rc2 |
48 |
#include <linux/mm.h> |
9984de1a5 kernel: Map most ... |
49 |
#include <linux/export.h> |
5a0e3ad6a include cleanup: ... |
50 |
#include <linux/slab.h> |
b7d112581 AUDIT: Send netli... |
51 52 |
#include <linux/err.h> #include <linux/kthread.h> |
46e959ea2 audit: add an opt... |
53 |
#include <linux/kernel.h> |
b24a30a73 audit: fix event ... |
54 |
#include <linux/syscalls.h> |
5b52330bb audit: fix auditd... |
55 56 57 58 |
#include <linux/spinlock.h> #include <linux/rcupdate.h> #include <linux/mutex.h> #include <linux/gfp.h> |
b6c7c115c audit: store the ... |
59 |
#include <linux/pid.h> |
8cc96382d audit: use kmem_c... |
60 |
#include <linux/slab.h> |
1da177e4c Linux-2.6.12-rc2 |
61 62 63 64 |
#include <linux/audit.h> #include <net/sock.h> |
93315ed6d [PATCH] audit str... |
65 |
#include <net/netlink.h> |
1da177e4c Linux-2.6.12-rc2 |
66 |
#include <linux/skbuff.h> |
131ad62d8 netfilter: add SE... |
67 68 69 |
#ifdef CONFIG_SECURITY #include <linux/security.h> #endif |
7dfb71030 [PATCH] Add inclu... |
70 |
#include <linux/freezer.h> |
34e36d8ec audit: Limit audi... |
71 |
#include <linux/pid_namespace.h> |
33faba7fa audit: listen in ... |
72 |
#include <net/netns/generic.h> |
3dc7e3153 [PATCH] support f... |
73 74 |
#include "audit.h" |
1da177e4c Linux-2.6.12-rc2 |
75 |
|
a3f07114e [PATCH] Audit: ma... |
76 |
/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED. |
1da177e4c Linux-2.6.12-rc2 |
77 |
* (Initialization happens after skb_init is called.) */ |
a3f07114e [PATCH] Audit: ma... |
78 79 80 |
#define AUDIT_DISABLED -1 #define AUDIT_UNINITIALIZED 0 #define AUDIT_INITIALIZED 1 |
1da177e4c Linux-2.6.12-rc2 |
81 |
static int audit_initialized; |
1a6b9f231 [AUDIT] make audi... |
82 83 84 |
#define AUDIT_OFF 0 #define AUDIT_ON 1 #define AUDIT_LOCKED 2 |
0ad0bb601 audit: ensure tha... |
85 86 |
u32 audit_enabled = AUDIT_OFF; u32 audit_ever_enabled = !!AUDIT_OFF; |
1da177e4c Linux-2.6.12-rc2 |
87 |
|
ae9d67aff audit: export sym... |
88 |
EXPORT_SYMBOL_GPL(audit_enabled); |
1da177e4c Linux-2.6.12-rc2 |
89 |
/* Default state when kernel boots without any parameters. */ |
0ad0bb601 audit: ensure tha... |
90 |
static u32 audit_default = AUDIT_OFF; |
1da177e4c Linux-2.6.12-rc2 |
91 92 |
/* If auditing cannot proceed, audit_failure selects what happens. */ |
3e1d0bb62 audit: Convert in... |
93 |
static u32 audit_failure = AUDIT_FAIL_PRINTK; |
1da177e4c Linux-2.6.12-rc2 |
94 |
|
5b52330bb audit: fix auditd... |
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 |
/* 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... |
111 |
* @rcu: RCU head |
5b52330bb audit: fix auditd... |
112 113 114 |
* * Description: * This struct is RCU protected; you must either hold the RCU lock for reading |
48d0e023a audit: fix the RC... |
115 |
* or the associated spinlock for writing. |
75c0371a2 audit: netlink so... |
116 |
*/ |
5b52330bb audit: fix auditd... |
117 |
static struct auditd_connection { |
b6c7c115c audit: store the ... |
118 |
struct pid *pid; |
5b52330bb audit: fix auditd... |
119 120 |
u32 portid; struct net *net; |
48d0e023a audit: fix the RC... |
121 122 123 |
struct rcu_head rcu; } *auditd_conn = NULL; static DEFINE_SPINLOCK(auditd_conn_lock); |
1da177e4c Linux-2.6.12-rc2 |
124 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
125 |
/* If audit_rate_limit is non-zero, limit the rate of sending audit records |
1da177e4c Linux-2.6.12-rc2 |
126 127 |
* to that number per second. This prevents DoS attacks, but results in * audit records being dropped. */ |
3e1d0bb62 audit: Convert in... |
128 |
static u32 audit_rate_limit; |
1da177e4c Linux-2.6.12-rc2 |
129 |
|
40c0775e5 audit: allow unli... |
130 131 |
/* Number of outstanding audit_buffers allowed. * When set to zero, this means unlimited. */ |
3e1d0bb62 audit: Convert in... |
132 |
static u32 audit_backlog_limit = 64; |
e789e561a audit: reset audi... |
133 |
#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ) |
3e1d0bb62 audit: Convert in... |
134 |
static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME; |
1da177e4c Linux-2.6.12-rc2 |
135 |
|
c2f0c7c35 The attached patc... |
136 |
/* The identity of the user shutting down the audit system. */ |
cca080d9b userns: Convert a... |
137 |
kuid_t audit_sig_uid = INVALID_UID; |
c2f0c7c35 The attached patc... |
138 |
pid_t audit_sig_pid = -1; |
e1396065e [PATCH] collect s... |
139 |
u32 audit_sig_sid = 0; |
c2f0c7c35 The attached patc... |
140 |
|
1da177e4c Linux-2.6.12-rc2 |
141 142 143 144 145 146 147 |
/* 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... |
148 |
static atomic_t audit_lost = ATOMIC_INIT(0); |
1da177e4c Linux-2.6.12-rc2 |
149 |
|
f368c07d7 [PATCH] audit: pa... |
150 151 |
/* Hash for inode-based rules */ struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; |
8cc96382d audit: use kmem_c... |
152 |
static struct kmem_cache *audit_buffer_cache; |
1da177e4c Linux-2.6.12-rc2 |
153 |
|
c6480207f audit: rework the... |
154 |
/* queue msgs to send via kauditd_task */ |
af8b824f2 audit: rename the... |
155 |
static struct sk_buff_head audit_queue; |
c6480207f audit: rework the... |
156 157 158 |
/* 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... |
159 |
static struct sk_buff_head audit_hold_queue; |
c6480207f audit: rework the... |
160 161 |
/* queue servicing thread */ |
b7d112581 AUDIT: Send netli... |
162 163 |
static struct task_struct *kauditd_task; static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait); |
c6480207f audit: rework the... |
164 165 |
/* waitqueue for callers who are blocked on the audit backlog */ |
9ad9ad385 AUDIT: Wait for b... |
166 |
static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait); |
1da177e4c Linux-2.6.12-rc2 |
167 |
|
b0fed4021 audit: implement ... |
168 169 170 171 |
static struct audit_features af = {.vers = AUDIT_FEATURE_VERSION, .mask = -1, .features = 0, .lock = 0,}; |
21b85c31d audit: audit feat... |
172 |
static char *audit_feature_names[2] = { |
d040e5af3 audit: audit feat... |
173 |
"only_unset_loginuid", |
21b85c31d audit: audit feat... |
174 |
"loginuid_immutable", |
b0fed4021 audit: implement ... |
175 |
}; |
f368c07d7 [PATCH] audit: pa... |
176 |
/* Serialize requests from userspace. */ |
916d75761 Fix rule eviction... |
177 |
DEFINE_MUTEX(audit_cmd_mutex); |
1da177e4c Linux-2.6.12-rc2 |
178 179 180 181 182 |
/* 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 |
183 184 185 186 187 188 |
/* 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... |
189 |
struct sk_buff *skb; /* formatted skb ready to send */ |
1da177e4c Linux-2.6.12-rc2 |
190 |
struct audit_context *ctx; /* NULL or associated context */ |
9796fdd82 [PATCH] gfp_t: ke... |
191 |
gfp_t gfp_mask; |
1da177e4c Linux-2.6.12-rc2 |
192 |
}; |
f09ac9db2 Audit: stop deadl... |
193 |
struct audit_reply { |
f9441639e audit: fix netlin... |
194 |
__u32 portid; |
638a0fd2a audit: Use struct... |
195 |
struct net *net; |
f09ac9db2 Audit: stop deadl... |
196 197 |
struct sk_buff *skb; }; |
5b52330bb audit: fix auditd... |
198 199 200 201 202 203 204 |
/** * 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 ... |
205 |
int auditd_test_task(struct task_struct *task) |
5b52330bb audit: fix auditd... |
206 207 |
{ int rc; |
48d0e023a audit: fix the RC... |
208 |
struct auditd_connection *ac; |
5b52330bb audit: fix auditd... |
209 210 |
rcu_read_lock(); |
48d0e023a audit: fix the RC... |
211 212 |
ac = rcu_dereference(auditd_conn); rc = (ac && ac->pid == task_tgid(task) ? 1 : 0); |
5b52330bb audit: fix auditd... |
213 214 215 216 217 218 |
rcu_read_unlock(); return rc; } /** |
b6c7c115c audit: store the ... |
219 |
* auditd_pid_vnr - Return the auditd PID relative to the namespace |
b6c7c115c audit: store the ... |
220 221 |
* * Description: |
48d0e023a audit: fix the RC... |
222 |
* Returns the PID in relation to the namespace, 0 on failure. |
b6c7c115c audit: store the ... |
223 |
*/ |
48d0e023a audit: fix the RC... |
224 |
static pid_t auditd_pid_vnr(void) |
b6c7c115c audit: store the ... |
225 226 |
{ pid_t pid; |
48d0e023a audit: fix the RC... |
227 |
const struct auditd_connection *ac; |
b6c7c115c audit: store the ... |
228 229 |
rcu_read_lock(); |
48d0e023a audit: fix the RC... |
230 231 |
ac = rcu_dereference(auditd_conn); if (!ac || !ac->pid) |
b6c7c115c audit: store the ... |
232 233 |
pid = 0; else |
48d0e023a audit: fix the RC... |
234 |
pid = pid_vnr(ac->pid); |
b6c7c115c audit: store the ... |
235 236 237 238 239 240 |
rcu_read_unlock(); return pid; } /** |
5b52330bb audit: fix auditd... |
241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 |
* 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... |
258 |
void audit_panic(const char *message) |
1da177e4c Linux-2.6.12-rc2 |
259 |
{ |
d957f7b72 audit: Use more c... |
260 |
switch (audit_failure) { |
1da177e4c Linux-2.6.12-rc2 |
261 262 263 |
case AUDIT_FAIL_SILENT: break; case AUDIT_FAIL_PRINTK: |
320f1b1ed [AUDIT] ratelimit... |
264 |
if (printk_ratelimit()) |
d957f7b72 audit: Use more c... |
265 266 |
pr_err("%s ", message); |
1da177e4c Linux-2.6.12-rc2 |
267 268 |
break; case AUDIT_FAIL_PANIC: |
5b52330bb audit: fix auditd... |
269 270 |
panic("audit: %s ", message); |
1da177e4c Linux-2.6.12-rc2 |
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 |
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... |
303 304 305 306 307 308 309 310 |
/** * 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 |
311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 |
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... |
334 |
if (printk_ratelimit()) |
3e1d0bb62 audit: Convert in... |
335 336 |
pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u ", |
320f1b1ed [AUDIT] ratelimit... |
337 338 339 |
atomic_read(&audit_lost), audit_rate_limit, audit_backlog_limit); |
1da177e4c Linux-2.6.12-rc2 |
340 341 |
audit_panic(message); } |
1da177e4c Linux-2.6.12-rc2 |
342 |
} |
3e1d0bb62 audit: Convert in... |
343 |
static int audit_log_config_change(char *function_name, u32 new, u32 old, |
2532386f4 Audit: collect se... |
344 |
int allow_changes) |
1da177e4c Linux-2.6.12-rc2 |
345 |
{ |
1a6b9f231 [AUDIT] make audi... |
346 347 |
struct audit_buffer *ab; int rc = 0; |
ce29b682e [PATCH] More user... |
348 |
|
1a6b9f231 [AUDIT] make audi... |
349 |
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); |
0644ec0cc audit: catch poss... |
350 351 |
if (unlikely(!ab)) return rc; |
3e1d0bb62 audit: Convert in... |
352 |
audit_log_format(ab, "%s=%u old=%u", function_name, new, old); |
4d3fb709b helper for some s... |
353 |
audit_log_session_info(ab); |
b122c3767 audit: use a cons... |
354 355 356 |
rc = audit_log_task_context(ab); if (rc) allow_changes = 0; /* Something weird, deny request */ |
1a6b9f231 [AUDIT] make audi... |
357 358 |
audit_log_format(ab, " res=%d", allow_changes); audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
359 |
return rc; |
1da177e4c Linux-2.6.12-rc2 |
360 |
} |
3e1d0bb62 audit: Convert in... |
361 |
static int audit_do_config_change(char *function_name, u32 *to_change, u32 new) |
1da177e4c Linux-2.6.12-rc2 |
362 |
{ |
3e1d0bb62 audit: Convert in... |
363 364 |
int allow_changes, rc = 0; u32 old = *to_change; |
6a01b07fa [PATCH] audit con... |
365 366 |
/* check if we are locked */ |
1a6b9f231 [AUDIT] make audi... |
367 368 |
if (audit_enabled == AUDIT_LOCKED) allow_changes = 0; |
6a01b07fa [PATCH] audit con... |
369 |
else |
1a6b9f231 [AUDIT] make audi... |
370 |
allow_changes = 1; |
ce29b682e [PATCH] More user... |
371 |
|
1a6b9f231 [AUDIT] make audi... |
372 |
if (audit_enabled != AUDIT_OFF) { |
dc9eb698f audit: stop pushi... |
373 |
rc = audit_log_config_change(function_name, new, old, allow_changes); |
1a6b9f231 [AUDIT] make audi... |
374 375 |
if (rc) allow_changes = 0; |
6a01b07fa [PATCH] audit con... |
376 |
} |
6a01b07fa [PATCH] audit con... |
377 378 |
/* If we are allowed, make the change */ |
1a6b9f231 [AUDIT] make audi... |
379 380 |
if (allow_changes == 1) *to_change = new; |
6a01b07fa [PATCH] audit con... |
381 382 383 384 |
/* Not allowed, update reason */ else if (rc == 0) rc = -EPERM; return rc; |
1da177e4c Linux-2.6.12-rc2 |
385 |
} |
3e1d0bb62 audit: Convert in... |
386 |
static int audit_set_rate_limit(u32 limit) |
1da177e4c Linux-2.6.12-rc2 |
387 |
{ |
dc9eb698f audit: stop pushi... |
388 |
return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit); |
1a6b9f231 [AUDIT] make audi... |
389 |
} |
ce29b682e [PATCH] More user... |
390 |
|
3e1d0bb62 audit: Convert in... |
391 |
static int audit_set_backlog_limit(u32 limit) |
1a6b9f231 [AUDIT] make audi... |
392 |
{ |
dc9eb698f audit: stop pushi... |
393 |
return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit); |
1a6b9f231 [AUDIT] make audi... |
394 |
} |
6a01b07fa [PATCH] audit con... |
395 |
|
3e1d0bb62 audit: Convert in... |
396 |
static int audit_set_backlog_wait_time(u32 timeout) |
51cc83f02 audit: add audit_... |
397 398 |
{ return audit_do_config_change("audit_backlog_wait_time", |
319754248 audit: rework aud... |
399 |
&audit_backlog_wait_time, timeout); |
51cc83f02 audit: add audit_... |
400 |
} |
3e1d0bb62 audit: Convert in... |
401 |
static int audit_set_enabled(u32 state) |
1a6b9f231 [AUDIT] make audi... |
402 |
{ |
b593d384e [AUDIT] create co... |
403 |
int rc; |
724e7bfcc audit: Remove con... |
404 |
if (state > AUDIT_LOCKED) |
1a6b9f231 [AUDIT] make audi... |
405 |
return -EINVAL; |
6a01b07fa [PATCH] audit con... |
406 |
|
dc9eb698f audit: stop pushi... |
407 |
rc = audit_do_config_change("audit_enabled", &audit_enabled, state); |
b593d384e [AUDIT] create co... |
408 409 410 411 |
if (!rc) audit_ever_enabled |= !!state; return rc; |
1da177e4c Linux-2.6.12-rc2 |
412 |
} |
3e1d0bb62 audit: Convert in... |
413 |
static int audit_set_failure(u32 state) |
1da177e4c Linux-2.6.12-rc2 |
414 |
{ |
1da177e4c Linux-2.6.12-rc2 |
415 416 417 418 |
if (state != AUDIT_FAIL_SILENT && state != AUDIT_FAIL_PRINTK && state != AUDIT_FAIL_PANIC) return -EINVAL; |
ce29b682e [PATCH] More user... |
419 |
|
dc9eb698f audit: stop pushi... |
420 |
return audit_do_config_change("audit_failure", &audit_failure, state); |
1da177e4c Linux-2.6.12-rc2 |
421 |
} |
5b52330bb audit: fix auditd... |
422 |
/** |
48d0e023a audit: fix the RC... |
423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 |
* 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. */ static void auditd_conn_free(struct rcu_head *rcu) { struct auditd_connection *ac; ac = container_of(rcu, struct auditd_connection, rcu); put_pid(ac->pid); put_net(ac->net); kfree(ac); } /** |
5b52330bb audit: fix auditd... |
441 442 443 444 445 446 447 |
* 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... |
448 |
* necessary. Returns zero on success, negative values on failure. |
5b52330bb audit: fix auditd... |
449 |
*/ |
48d0e023a audit: fix the RC... |
450 |
static int auditd_set(struct pid *pid, u32 portid, struct net *net) |
5b52330bb audit: fix auditd... |
451 452 |
{ unsigned long flags; |
48d0e023a audit: fix the RC... |
453 |
struct auditd_connection *ac_old, *ac_new; |
5b52330bb audit: fix auditd... |
454 |
|
48d0e023a audit: fix the RC... |
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 |
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... |
475 476 477 |
} /** |
5b52330bb audit: fix auditd... |
478 479 480 481 482 |
* 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 ... |
483 |
*/ |
af8b824f2 audit: rename the... |
484 |
static void kauditd_printk_skb(struct sk_buff *skb) |
038cbcf65 Audit: unify the ... |
485 486 |
{ struct nlmsghdr *nlh = nlmsg_hdr(skb); |
c64e66c67 audit: netlink: M... |
487 |
char *data = nlmsg_data(nlh); |
038cbcf65 Audit: unify the ... |
488 |
|
5b52330bb audit: fix auditd... |
489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 |
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... |
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 |
} /** * 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 ... |
538 |
|
c6480207f audit: rework the... |
539 540 541 |
/* we have no other options - drop the message */ audit_log_lost("kauditd hold queue overflow"); kfree_skb(skb); |
038cbcf65 Audit: unify the ... |
542 |
} |
c6480207f audit: rework the... |
543 544 545 546 547 548 549 550 551 552 |
/** * 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... |
553 |
{ |
c6480207f audit: rework the... |
554 555 556 557 558 |
/* 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... |
559 |
|
c6480207f audit: rework the... |
560 |
/** |
264d50963 audit: make sure ... |
561 |
* auditd_reset - Disconnect the auditd connection |
c81be52a3 audit: fix a race... |
562 |
* @ac: auditd connection state |
264d50963 audit: make sure ... |
563 564 565 |
* * Description: * Break the auditd/kauditd connection and move all the queued records into the |
c81be52a3 audit: fix a race... |
566 567 568 569 |
* 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 ... |
570 |
*/ |
c81be52a3 audit: fix a race... |
571 |
static void auditd_reset(const struct auditd_connection *ac) |
264d50963 audit: make sure ... |
572 |
{ |
48d0e023a audit: fix the RC... |
573 |
unsigned long flags; |
264d50963 audit: make sure ... |
574 |
struct sk_buff *skb; |
48d0e023a audit: fix the RC... |
575 |
struct auditd_connection *ac_old; |
264d50963 audit: make sure ... |
576 577 |
/* if it isn't already broken, break the connection */ |
48d0e023a audit: fix the RC... |
578 579 580 |
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... |
581 582 583 584 585 |
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... |
586 587 588 589 590 |
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 ... |
591 |
|
cd33f5f2c audit: make sure ... |
592 593 |
/* 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 ... |
594 595 |
while ((skb = skb_dequeue(&audit_retry_queue))) kauditd_hold_skb(skb); |
264d50963 audit: make sure ... |
596 597 598 |
} /** |
5b52330bb audit: fix auditd... |
599 600 |
* auditd_send_unicast_skb - Send a record via unicast to auditd * @skb: audit record |
c6480207f audit: rework the... |
601 602 |
* * Description: |
5b52330bb audit: fix auditd... |
603 604 605 606 607 |
* 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... |
608 |
*/ |
5b52330bb audit: fix auditd... |
609 |
static int auditd_send_unicast_skb(struct sk_buff *skb) |
c6480207f audit: rework the... |
610 |
{ |
5b52330bb audit: fix auditd... |
611 612 613 614 |
int rc; u32 portid; struct net *net; struct sock *sk; |
48d0e023a audit: fix the RC... |
615 |
struct auditd_connection *ac; |
5b52330bb audit: fix auditd... |
616 617 618 619 620 621 622 623 624 |
/* 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... |
625 626 |
ac = rcu_dereference(auditd_conn); if (!ac) { |
5b52330bb audit: fix auditd... |
627 |
rcu_read_unlock(); |
b0659ae5e audit: fix memlea... |
628 |
kfree_skb(skb); |
5b52330bb audit: fix auditd... |
629 630 |
rc = -ECONNREFUSED; goto err; |
533c7b69c audit: use proper... |
631 |
} |
48d0e023a audit: fix the RC... |
632 |
net = get_net(ac->net); |
5b52330bb audit: fix auditd... |
633 |
sk = audit_get_sk(net); |
48d0e023a audit: fix the RC... |
634 |
portid = ac->portid; |
5b52330bb audit: fix auditd... |
635 |
rcu_read_unlock(); |
c6480207f audit: rework the... |
636 |
|
5b52330bb audit: fix auditd... |
637 638 639 640 641 642 643 644 |
rc = netlink_unicast(sk, skb, portid, 0); put_net(net); if (rc < 0) goto err; return rc; err: |
c81be52a3 audit: fix a race... |
645 646 |
if (ac && rc == -ECONNREFUSED) auditd_reset(ac); |
5b52330bb audit: fix auditd... |
647 |
return rc; |
c6480207f audit: rework the... |
648 649 650 |
} /** |
5b52330bb audit: fix auditd... |
651 652 653 654 655 656 657 658 659 660 661 662 663 |
* 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... |
664 |
*/ |
5b52330bb audit: fix auditd... |
665 666 667 668 669 |
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... |
670 |
{ |
5b52330bb audit: fix auditd... |
671 672 673 |
int rc = 0; struct sk_buff *skb; static unsigned int failed = 0; |
32a1dbaec audit: try harder... |
674 |
|
5b52330bb audit: fix auditd... |
675 676 677 678 679 680 681 682 683 684 685 686 687 688 |
/* 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... |
689 |
|
5b52330bb audit: fix auditd... |
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 |
/* 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... |
713 |
} |
5b52330bb audit: fix auditd... |
714 715 |
out: return (rc >= 0 ? 0 : rc); |
f3d357b09 Audit: save audit... |
716 |
} |
b551d1d98 audit: refactor h... |
717 |
/* |
c6480207f audit: rework the... |
718 719 |
* kauditd_send_multicast_skb - Send a record to any multicast listeners * @skb: audit record |
451f92163 audit: add netlin... |
720 |
* |
c6480207f audit: rework the... |
721 |
* Description: |
5b52330bb audit: fix auditd... |
722 723 724 |
* 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... |
725 |
*/ |
c6480207f audit: rework the... |
726 |
static void kauditd_send_multicast_skb(struct sk_buff *skb) |
451f92163 audit: add netlin... |
727 |
{ |
c6480207f audit: rework the... |
728 |
struct sk_buff *copy; |
5b52330bb audit: fix auditd... |
729 |
struct sock *sock = audit_get_sk(&init_net); |
c6480207f audit: rework the... |
730 |
struct nlmsghdr *nlh; |
451f92163 audit: add netlin... |
731 |
|
5b52330bb audit: fix auditd... |
732 733 |
/* 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... |
734 735 |
if (!netlink_has_listeners(sock, AUDIT_NLGRP_READLOG)) return; |
451f92163 audit: add netlin... |
736 737 738 739 740 741 742 743 744 745 |
/* * 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... |
746 |
copy = skb_copy(skb, GFP_KERNEL); |
451f92163 audit: add netlin... |
747 748 |
if (!copy) return; |
c6480207f audit: rework the... |
749 750 |
nlh = nlmsg_hdr(copy); nlh->nlmsg_len = skb->len; |
451f92163 audit: add netlin... |
751 |
|
c6480207f audit: rework the... |
752 |
nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, GFP_KERNEL); |
451f92163 audit: add netlin... |
753 |
} |
c6480207f audit: rework the... |
754 |
/** |
5b52330bb audit: fix auditd... |
755 756 |
* kauditd_thread - Worker thread to send audit records to userspace * @dummy: unused |
b551d1d98 audit: refactor h... |
757 |
*/ |
97a41e261 [PATCH] kernel/: ... |
758 |
static int kauditd_thread(void *dummy) |
b7d112581 AUDIT: Send netli... |
759 |
{ |
c6480207f audit: rework the... |
760 |
int rc; |
5b52330bb audit: fix auditd... |
761 762 763 |
u32 portid = 0; struct net *net = NULL; struct sock *sk = NULL; |
48d0e023a audit: fix the RC... |
764 |
struct auditd_connection *ac; |
4aa83872d audit: queue netl... |
765 |
|
c6480207f audit: rework the... |
766 |
#define UNICAST_RETRIES 5 |
c6480207f audit: rework the... |
767 |
|
831441862 Freezer: make ker... |
768 |
set_freezable(); |
4899b8b16 [PATCH] kauditd_t... |
769 |
while (!kthread_should_stop()) { |
5b52330bb audit: fix auditd... |
770 771 |
/* NOTE: see the lock comments in auditd_send_unicast_skb() */ rcu_read_lock(); |
48d0e023a audit: fix the RC... |
772 773 |
ac = rcu_dereference(auditd_conn); if (!ac) { |
5b52330bb audit: fix auditd... |
774 775 776 |
rcu_read_unlock(); goto main_queue; } |
48d0e023a audit: fix the RC... |
777 |
net = get_net(ac->net); |
5b52330bb audit: fix auditd... |
778 |
sk = audit_get_sk(net); |
48d0e023a audit: fix the RC... |
779 |
portid = ac->portid; |
5b52330bb audit: fix auditd... |
780 |
rcu_read_unlock(); |
c6480207f audit: rework the... |
781 782 |
/* attempt to flush the hold queue */ |
5b52330bb audit: fix auditd... |
783 784 785 |
rc = kauditd_send_queue(sk, portid, &audit_hold_queue, UNICAST_RETRIES, NULL, kauditd_rehold_skb); |
c81be52a3 audit: fix a race... |
786 |
if (ac && rc < 0) { |
5b52330bb audit: fix auditd... |
787 |
sk = NULL; |
c81be52a3 audit: fix a race... |
788 |
auditd_reset(ac); |
5b52330bb audit: fix auditd... |
789 |
goto main_queue; |
c6480207f audit: rework the... |
790 |
} |
f3d357b09 Audit: save audit... |
791 |
|
c6480207f audit: rework the... |
792 |
/* attempt to flush the retry queue */ |
5b52330bb audit: fix auditd... |
793 794 795 |
rc = kauditd_send_queue(sk, portid, &audit_retry_queue, UNICAST_RETRIES, NULL, kauditd_hold_skb); |
c81be52a3 audit: fix a race... |
796 |
if (ac && rc < 0) { |
5b52330bb audit: fix auditd... |
797 |
sk = NULL; |
c81be52a3 audit: fix a race... |
798 |
auditd_reset(ac); |
5b52330bb audit: fix auditd... |
799 |
goto main_queue; |
c6480207f audit: rework the... |
800 |
} |
db8973194 audit: efficiency... |
801 |
|
5b52330bb audit: fix auditd... |
802 803 804 805 |
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... |
806 |
* multicast send and move the record to the hold queue */ |
264d50963 audit: make sure ... |
807 808 |
rc = kauditd_send_queue(sk, portid, &audit_queue, 1, kauditd_send_multicast_skb, |
c81be52a3 audit: fix a race... |
809 810 811 812 |
(sk ? kauditd_retry_skb : kauditd_hold_skb)); if (ac && rc < 0) auditd_reset(ac); |
264d50963 audit: make sure ... |
813 |
sk = NULL; |
5b52330bb audit: fix auditd... |
814 815 816 817 818 |
/* drop our netns reference, no auditd sends past this line */ if (net) { put_net(net); net = NULL; |
3320c5133 audit: flatten ka... |
819 |
} |
5b52330bb audit: fix auditd... |
820 821 822 823 824 825 826 827 828 829 |
/* 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... |
830 |
} |
c6480207f audit: rework the... |
831 |
|
4899b8b16 [PATCH] kauditd_t... |
832 |
return 0; |
b7d112581 AUDIT: Send netli... |
833 |
} |
9044e6bca [PATCH] fix deadl... |
834 835 836 |
int audit_send_list(void *_dest) { struct audit_netlink_list *dest = _dest; |
9044e6bca [PATCH] fix deadl... |
837 |
struct sk_buff *skb; |
5b52330bb audit: fix auditd... |
838 |
struct sock *sk = audit_get_sk(dest->net); |
9044e6bca [PATCH] fix deadl... |
839 840 |
/* wait for parent to finish and send an ACK */ |
f368c07d7 [PATCH] audit: pa... |
841 842 |
mutex_lock(&audit_cmd_mutex); mutex_unlock(&audit_cmd_mutex); |
9044e6bca [PATCH] fix deadl... |
843 844 |
while ((skb = __skb_dequeue(&dest->q)) != NULL) |
5b52330bb audit: fix auditd... |
845 |
netlink_unicast(sk, skb, dest->portid, 0); |
9044e6bca [PATCH] fix deadl... |
846 |
|
5b52330bb audit: fix auditd... |
847 |
put_net(dest->net); |
9044e6bca [PATCH] fix deadl... |
848 849 850 851 |
kfree(dest); return 0; } |
45a0642b4 audit: kernel gen... |
852 |
struct sk_buff *audit_make_reply(int seq, int type, int done, |
b8800aa5d audit: make funct... |
853 |
int multi, const void *payload, int size) |
9044e6bca [PATCH] fix deadl... |
854 855 856 |
{ struct sk_buff *skb; struct nlmsghdr *nlh; |
9044e6bca [PATCH] fix deadl... |
857 858 859 |
void *data; int flags = multi ? NLM_F_MULTI : 0; int t = done ? NLMSG_DONE : type; |
ee080e6ce Audit: cleanup ne... |
860 |
skb = nlmsg_new(size, GFP_KERNEL); |
9044e6bca [PATCH] fix deadl... |
861 862 |
if (!skb) return NULL; |
45a0642b4 audit: kernel gen... |
863 |
nlh = nlmsg_put(skb, 0, seq, t, size, flags); |
c64e66c67 audit: netlink: M... |
864 865 866 |
if (!nlh) goto out_kfree_skb; data = nlmsg_data(nlh); |
9044e6bca [PATCH] fix deadl... |
867 868 |
memcpy(data, payload, size); return skb; |
c64e66c67 audit: netlink: M... |
869 870 |
out_kfree_skb: kfree_skb(skb); |
9044e6bca [PATCH] fix deadl... |
871 872 |
return NULL; } |
f09ac9db2 Audit: stop deadl... |
873 874 875 |
static int audit_send_reply_thread(void *arg) { struct audit_reply *reply = (struct audit_reply *)arg; |
5b52330bb audit: fix auditd... |
876 |
struct sock *sk = audit_get_sk(reply->net); |
f09ac9db2 Audit: stop deadl... |
877 878 879 880 881 882 |
mutex_lock(&audit_cmd_mutex); mutex_unlock(&audit_cmd_mutex); /* Ignore failure. It'll only happen if the sender goes away, because our timeout is set to infinite. */ |
5b52330bb audit: fix auditd... |
883 884 |
netlink_unicast(sk, reply->skb, reply->portid, 0); put_net(reply->net); |
f09ac9db2 Audit: stop deadl... |
885 886 887 |
kfree(reply); return 0; } |
c6480207f audit: rework the... |
888 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
889 890 |
/** * audit_send_reply - send an audit reply message via netlink |
d211f177b audit: Update kdo... |
891 |
* @request_skb: skb of request we are replying to (used to target the reply) |
b0dd25a82 [PATCH] AUDIT: ke... |
892 893 894 895 896 897 898 |
* @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... |
899 |
* Allocates an skb, builds the netlink message, and sends it to the port id. |
b0dd25a82 [PATCH] AUDIT: ke... |
900 901 |
* No failure notifications. */ |
6f285b19d audit: Send repli... |
902 |
static void audit_send_reply(struct sk_buff *request_skb, int seq, int type, int done, |
f9441639e audit: fix netlin... |
903 |
int multi, const void *payload, int size) |
1da177e4c Linux-2.6.12-rc2 |
904 |
{ |
6f285b19d audit: Send repli... |
905 |
struct net *net = sock_net(NETLINK_CB(request_skb).sk); |
f09ac9db2 Audit: stop deadl... |
906 907 908 909 910 911 912 |
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... |
913 |
skb = audit_make_reply(seq, type, done, multi, payload, size); |
1da177e4c Linux-2.6.12-rc2 |
914 |
if (!skb) |
fcaf1eb86 [patch 1/1] audit... |
915 |
goto out; |
f09ac9db2 Audit: stop deadl... |
916 |
|
6f285b19d audit: Send repli... |
917 |
reply->net = get_net(net); |
45a0642b4 audit: kernel gen... |
918 |
reply->portid = NETLINK_CB(request_skb).portid; |
f09ac9db2 Audit: stop deadl... |
919 920 921 |
reply->skb = skb; tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply"); |
fcaf1eb86 [patch 1/1] audit... |
922 923 924 925 926 |
if (!IS_ERR(tsk)) return; kfree_skb(skb); out: kfree(reply); |
1da177e4c Linux-2.6.12-rc2 |
927 928 929 930 931 932 |
} /* * Check for appropriate CAP_AUDIT_ capabilities on incoming audit * control messages. */ |
c7bdb545d [NETLINK]: Encaps... |
933 |
static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type) |
1da177e4c Linux-2.6.12-rc2 |
934 935 |
{ int err = 0; |
5a3cb3b6c audit: allow user... |
936 |
/* Only support initial user namespace for now. */ |
aa4af831b AUDIT: Allow logi... |
937 938 939 940 941 942 943 944 945 946 |
/* * 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... |
947 |
if (current_user_ns() != &init_user_ns) |
aa4af831b AUDIT: Allow logi... |
948 |
return -ECONNREFUSED; |
34e36d8ec audit: Limit audi... |
949 |
|
1da177e4c Linux-2.6.12-rc2 |
950 |
switch (msg_type) { |
1da177e4c Linux-2.6.12-rc2 |
951 |
case AUDIT_LIST: |
1da177e4c Linux-2.6.12-rc2 |
952 953 |
case AUDIT_ADD: case AUDIT_DEL: |
189009091 audit: remove the... |
954 955 956 |
return -EOPNOTSUPP; case AUDIT_GET: case AUDIT_SET: |
b0fed4021 audit: implement ... |
957 958 |
case AUDIT_GET_FEATURE: case AUDIT_SET_FEATURE: |
189009091 audit: remove the... |
959 960 |
case AUDIT_LIST_RULES: case AUDIT_ADD_RULE: |
93315ed6d [PATCH] audit str... |
961 |
case AUDIT_DEL_RULE: |
c2f0c7c35 The attached patc... |
962 |
case AUDIT_SIGNAL_INFO: |
522ed7767 Audit: add TTY in... |
963 964 |
case AUDIT_TTY_GET: case AUDIT_TTY_SET: |
74c3cbe33 [PATCH] audit: wa... |
965 966 |
case AUDIT_TRIM: case AUDIT_MAKE_EQUIV: |
5a3cb3b6c audit: allow user... |
967 968 |
/* Only support auditd and auditctl in initial pid namespace * for now. */ |
5985de675 audit: code clean up |
969 |
if (task_active_pid_ns(current) != &init_pid_ns) |
5a3cb3b6c audit: allow user... |
970 |
return -EPERM; |
90f62cf30 net: Use netlink_... |
971 |
if (!netlink_capable(skb, CAP_AUDIT_CONTROL)) |
1da177e4c Linux-2.6.12-rc2 |
972 973 |
err = -EPERM; break; |
05474106a AUDIT: Fix AVC_US... |
974 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
975 976 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
90f62cf30 net: Use netlink_... |
977 |
if (!netlink_capable(skb, CAP_AUDIT_WRITE)) |
1da177e4c Linux-2.6.12-rc2 |
978 979 980 981 982 983 984 985 |
err = -EPERM; break; default: /* bad msg */ err = -EINVAL; } return err; } |
233a68667 audit: make audit... |
986 |
static void audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) |
50397bd1e [AUDIT] clean up ... |
987 |
{ |
dc9eb698f audit: stop pushi... |
988 |
uid_t uid = from_kuid(&init_user_ns, current_uid()); |
f1dc4867f audit: anchor all... |
989 |
pid_t pid = task_tgid_nr(current); |
50397bd1e [AUDIT] clean up ... |
990 |
|
0868a5e15 audit: printk USE... |
991 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) { |
50397bd1e [AUDIT] clean up ... |
992 |
*ab = NULL; |
233a68667 audit: make audit... |
993 |
return; |
50397bd1e [AUDIT] clean up ... |
994 995 996 |
} *ab = audit_log_start(NULL, GFP_KERNEL, msg_type); |
0644ec0cc audit: catch poss... |
997 |
if (unlikely(!*ab)) |
233a68667 audit: make audit... |
998 |
return; |
f1dc4867f audit: anchor all... |
999 |
audit_log_format(*ab, "pid=%d uid=%u", pid, uid); |
4d3fb709b helper for some s... |
1000 |
audit_log_session_info(*ab); |
b122c3767 audit: use a cons... |
1001 |
audit_log_task_context(*ab); |
50397bd1e [AUDIT] clean up ... |
1002 |
} |
b0fed4021 audit: implement ... |
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 |
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... |
1014 |
audit_send_reply(skb, seq, AUDIT_GET_FEATURE, 0, 0, &af, sizeof(af)); |
b0fed4021 audit: implement ... |
1015 1016 1017 1018 1019 1020 1021 1022 |
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... |
1023 1024 |
if (audit_enabled == AUDIT_OFF) return; |
b0fed4021 audit: implement ... |
1025 |
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE); |
4a856adf2 audit: return on ... |
1026 1027 |
if (!ab) return; |
ad2ac2632 audit: log task i... |
1028 |
audit_log_task_info(ab, current); |
897f1acbb audit: AUDIT_FEAT... |
1029 |
audit_log_format(ab, " feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d", |
b0fed4021 audit: implement ... |
1030 1031 1032 1033 1034 1035 1036 1037 1038 |
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... |
1039 |
BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names)); |
b0fed4021 audit: implement ... |
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 |
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... |
1058 |
if (old_lock && (new_feature != old_feature)) { |
b0fed4021 audit: implement ... |
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 |
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 ... |
1091 |
static int audit_replace(struct pid *pid) |
133e1e5ac audit: stop an ol... |
1092 |
{ |
b6c7c115c audit: store the ... |
1093 |
pid_t pvnr; |
5b52330bb audit: fix auditd... |
1094 |
struct sk_buff *skb; |
133e1e5ac audit: stop an ol... |
1095 |
|
b6c7c115c audit: store the ... |
1096 1097 |
pvnr = pid_vnr(pid); skb = audit_make_reply(0, AUDIT_REPLACE, 0, 0, &pvnr, sizeof(pvnr)); |
133e1e5ac audit: stop an ol... |
1098 1099 |
if (!skb) return -ENOMEM; |
5b52330bb audit: fix auditd... |
1100 |
return auditd_send_unicast_skb(skb); |
133e1e5ac audit: stop an ol... |
1101 |
} |
1da177e4c Linux-2.6.12-rc2 |
1102 1103 |
static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { |
dc9eb698f audit: stop pushi... |
1104 |
u32 seq; |
1da177e4c Linux-2.6.12-rc2 |
1105 |
void *data; |
1da177e4c Linux-2.6.12-rc2 |
1106 |
int err; |
c04049939 AUDIT: Add messag... |
1107 |
struct audit_buffer *ab; |
1da177e4c Linux-2.6.12-rc2 |
1108 |
u16 msg_type = nlh->nlmsg_type; |
e1396065e [PATCH] collect s... |
1109 |
struct audit_sig_info *sig_data; |
50397bd1e [AUDIT] clean up ... |
1110 |
char *ctx = NULL; |
e1396065e [PATCH] collect s... |
1111 |
u32 len; |
1da177e4c Linux-2.6.12-rc2 |
1112 |
|
c7bdb545d [NETLINK]: Encaps... |
1113 |
err = audit_netlink_ok(skb, msg_type); |
1da177e4c Linux-2.6.12-rc2 |
1114 1115 |
if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
1116 |
seq = nlh->nlmsg_seq; |
c64e66c67 audit: netlink: M... |
1117 |
data = nlmsg_data(nlh); |
1da177e4c Linux-2.6.12-rc2 |
1118 1119 |
switch (msg_type) { |
09f883a90 audit: clean up A... |
1120 1121 1122 1123 1124 |
case AUDIT_GET: { struct audit_status s; memset(&s, 0, sizeof(s)); s.enabled = audit_enabled; s.failure = audit_failure; |
b6c7c115c audit: store the ... |
1125 1126 |
/* NOTE: use pid_vnr() so the PID is relative to the current * namespace */ |
48d0e023a audit: fix the RC... |
1127 |
s.pid = auditd_pid_vnr(); |
09f883a90 audit: clean up A... |
1128 1129 1130 |
s.rate_limit = audit_rate_limit; s.backlog_limit = audit_backlog_limit; s.lost = atomic_read(&audit_lost); |
af8b824f2 audit: rename the... |
1131 |
s.backlog = skb_queue_len(&audit_queue); |
0288d7183 audit: convert st... |
1132 |
s.feature_bitmap = AUDIT_FEATURE_BITMAP_ALL; |
319754248 audit: rework aud... |
1133 |
s.backlog_wait_time = audit_backlog_wait_time; |
6f285b19d audit: Send repli... |
1134 |
audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &s, sizeof(s)); |
1da177e4c Linux-2.6.12-rc2 |
1135 |
break; |
09f883a90 audit: clean up A... |
1136 1137 1138 1139 1140 1141 1142 1143 |
} 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... |
1144 1145 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
1146 |
} |
09f883a90 audit: clean up A... |
1147 1148 |
if (s.mask & AUDIT_STATUS_FAILURE) { err = audit_set_failure(s.failure); |
20c6aaa39 [PATCH] Fix the b... |
1149 1150 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
1151 |
} |
09f883a90 audit: clean up A... |
1152 |
if (s.mask & AUDIT_STATUS_PID) { |
b6c7c115c audit: store the ... |
1153 1154 1155 1156 1157 1158 1159 |
/* 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... |
1160 |
pid_t auditd_pid; |
b6c7c115c audit: store the ... |
1161 |
struct pid *req_pid = task_tgid(current); |
4086f7cf0 audit: Allow audi... |
1162 1163 1164 |
/* 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 ... |
1165 |
return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
1166 |
|
5b52330bb audit: fix auditd... |
1167 |
/* test the auditd connection */ |
b6c7c115c audit: store the ... |
1168 |
audit_replace(req_pid); |
5b52330bb audit: fix auditd... |
1169 |
|
48d0e023a audit: fix the RC... |
1170 |
auditd_pid = auditd_pid_vnr(); |
4086f7cf0 audit: Allow audi... |
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 |
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... |
1184 |
} |
5b52330bb audit: fix auditd... |
1185 |
|
533c7b69c audit: use proper... |
1186 |
if (new_pid) { |
5b52330bb audit: fix auditd... |
1187 |
/* register a new auditd connection */ |
48d0e023a audit: fix the RC... |
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 |
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... |
1198 1199 |
/* try to process any backlog */ wake_up_interruptible(&kauditd_wait); |
48d0e023a audit: fix the RC... |
1200 1201 1202 1203 1204 |
} else { if (audit_enabled != AUDIT_OFF) audit_log_config_change("audit_pid", new_pid, auditd_pid, 1); |
5b52330bb audit: fix auditd... |
1205 |
/* unregister the auditd connection */ |
c81be52a3 audit: fix a race... |
1206 |
auditd_reset(NULL); |
48d0e023a audit: fix the RC... |
1207 |
} |
1da177e4c Linux-2.6.12-rc2 |
1208 |
} |
09f883a90 audit: clean up A... |
1209 1210 |
if (s.mask & AUDIT_STATUS_RATE_LIMIT) { err = audit_set_rate_limit(s.rate_limit); |
20c6aaa39 [PATCH] Fix the b... |
1211 1212 1213 |
if (err < 0) return err; } |
51cc83f02 audit: add audit_... |
1214 |
if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) { |
09f883a90 audit: clean up A... |
1215 |
err = audit_set_backlog_limit(s.backlog_limit); |
51cc83f02 audit: add audit_... |
1216 1217 1218 |
if (err < 0) return err; } |
3f0c5fad8 audit: remove nee... |
1219 1220 1221 |
if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) { if (sizeof(s) > (size_t)nlh->nlmsg_len) return -EINVAL; |
724e7bfcc audit: Remove con... |
1222 |
if (s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME) |
3f0c5fad8 audit: remove nee... |
1223 1224 1225 1226 |
return -EINVAL; err = audit_set_backlog_wait_time(s.backlog_wait_time); if (err < 0) return err; |
51cc83f02 audit: add audit_... |
1227 |
} |
92c82e8a3 audit: add featur... |
1228 1229 1230 1231 1232 1233 |
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 |
1234 |
break; |
09f883a90 audit: clean up A... |
1235 |
} |
b0fed4021 audit: implement ... |
1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 |
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... |
1246 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
1247 1248 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
4a4cd633b AUDIT: Optimise t... |
1249 1250 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) return 0; |
86b2efbe3 audit: add fields... |
1251 |
err = audit_filter(msg_type, AUDIT_FILTER_USER); |
724e4fcc8 audit: log on err... |
1252 |
if (err == 1) { /* match or error */ |
4a4cd633b AUDIT: Optimise t... |
1253 |
err = 0; |
522ed7767 Audit: add TTY in... |
1254 |
if (msg_type == AUDIT_USER_TTY) { |
37282a779 tty: audit: Combi... |
1255 |
err = tty_audit_push(); |
522ed7767 Audit: add TTY in... |
1256 1257 1258 |
if (err) break; } |
dc9eb698f audit: stop pushi... |
1259 |
audit_log_common_recv_msg(&ab, msg_type); |
50397bd1e [AUDIT] clean up ... |
1260 |
if (msg_type != AUDIT_USER_TTY) |
b50eba7e2 audit: format use... |
1261 1262 |
audit_log_format(ab, " msg='%.*s'", AUDIT_MESSAGE_TEXT_MAX, |
50397bd1e [AUDIT] clean up ... |
1263 1264 1265 |
(char *)data); else { int size; |
f7616102d audit: use data= ... |
1266 |
audit_log_format(ab, " data="); |
50397bd1e [AUDIT] clean up ... |
1267 |
size = nlmsg_len(nlh); |
55ad2f8d3 audit: ignore ter... |
1268 1269 1270 |
if (size > 0 && ((unsigned char *)data)[size - 1] == '\0') size--; |
b556f8ad5 Audit: standardiz... |
1271 |
audit_log_n_untrustedstring(ab, data, size); |
4a4cd633b AUDIT: Optimise t... |
1272 |
} |
50397bd1e [AUDIT] clean up ... |
1273 |
audit_log_end(ab); |
0f45aa18e AUDIT: Allow filt... |
1274 |
} |
1da177e4c Linux-2.6.12-rc2 |
1275 |
break; |
93315ed6d [PATCH] audit str... |
1276 1277 1278 1279 |
case AUDIT_ADD_RULE: case AUDIT_DEL_RULE: if (nlmsg_len(nlh) < sizeof(struct audit_rule_data)) return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
1280 |
if (audit_enabled == AUDIT_LOCKED) { |
dc9eb698f audit: stop pushi... |
1281 1282 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); audit_log_format(ab, " audit_enabled=%d res=0", audit_enabled); |
50397bd1e [AUDIT] clean up ... |
1283 |
audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
1284 1285 |
return -EPERM; } |
45a0642b4 audit: kernel gen... |
1286 |
err = audit_rule_change(msg_type, seq, data, nlmsg_len(nlh)); |
1da177e4c Linux-2.6.12-rc2 |
1287 |
break; |
ce0d9f046 audit: refactor a... |
1288 |
case AUDIT_LIST_RULES: |
6f285b19d audit: Send repli... |
1289 |
err = audit_list_rules_send(skb, seq); |
ce0d9f046 audit: refactor a... |
1290 |
break; |
74c3cbe33 [PATCH] audit: wa... |
1291 1292 |
case AUDIT_TRIM: audit_trim_trees(); |
dc9eb698f audit: stop pushi... |
1293 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
74c3cbe33 [PATCH] audit: wa... |
1294 1295 1296 1297 1298 1299 |
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... |
1300 |
size_t msglen = nlmsg_len(nlh); |
74c3cbe33 [PATCH] audit: wa... |
1301 1302 1303 |
char *old, *new; err = -EINVAL; |
7719e437f [PATCH 2/2] audit... |
1304 |
if (msglen < 2 * sizeof(u32)) |
74c3cbe33 [PATCH] audit: wa... |
1305 1306 1307 |
break; memcpy(sizes, bufp, 2 * sizeof(u32)); bufp += 2 * sizeof(u32); |
7719e437f [PATCH 2/2] audit... |
1308 1309 |
msglen -= 2 * sizeof(u32); old = audit_unpack_string(&bufp, &msglen, sizes[0]); |
74c3cbe33 [PATCH] audit: wa... |
1310 1311 1312 1313 |
if (IS_ERR(old)) { err = PTR_ERR(old); break; } |
7719e437f [PATCH 2/2] audit... |
1314 |
new = audit_unpack_string(&bufp, &msglen, sizes[1]); |
74c3cbe33 [PATCH] audit: wa... |
1315 1316 1317 1318 1319 1320 1321 |
if (IS_ERR(new)) { err = PTR_ERR(new); kfree(old); break; } /* OK, here comes... */ err = audit_tag_tree(old, new); |
dc9eb698f audit: stop pushi... |
1322 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
50397bd1e [AUDIT] clean up ... |
1323 |
|
74c3cbe33 [PATCH] audit: wa... |
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 |
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... |
1334 |
case AUDIT_SIGNAL_INFO: |
939cbf260 Audit: send signa... |
1335 1336 1337 1338 1339 1340 |
len = 0; if (audit_sig_sid) { err = security_secid_to_secctx(audit_sig_sid, &ctx, &len); if (err) return err; } |
e1396065e [PATCH] collect s... |
1341 1342 |
sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL); if (!sig_data) { |
939cbf260 Audit: send signa... |
1343 1344 |
if (audit_sig_sid) security_release_secctx(ctx, len); |
e1396065e [PATCH] collect s... |
1345 1346 |
return -ENOMEM; } |
cca080d9b userns: Convert a... |
1347 |
sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid); |
e1396065e [PATCH] collect s... |
1348 |
sig_data->pid = audit_sig_pid; |
939cbf260 Audit: send signa... |
1349 1350 1351 1352 |
if (audit_sig_sid) { memcpy(sig_data->ctx, ctx, len); security_release_secctx(ctx, len); } |
6f285b19d audit: Send repli... |
1353 1354 |
audit_send_reply(skb, seq, AUDIT_SIGNAL_INFO, 0, 0, sig_data, sizeof(*sig_data) + len); |
e1396065e [PATCH] collect s... |
1355 |
kfree(sig_data); |
c2f0c7c35 The attached patc... |
1356 |
break; |
522ed7767 Audit: add TTY in... |
1357 1358 |
case AUDIT_TTY_GET: { struct audit_tty_status s; |
2e28d38ae tty: audit: Handl... |
1359 |
unsigned int t; |
8aa14b649 audit: Simply AUD... |
1360 |
|
2e28d38ae tty: audit: Handl... |
1361 1362 1363 |
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... |
1364 |
|
6f285b19d audit: Send repli... |
1365 |
audit_send_reply(skb, seq, AUDIT_TTY_GET, 0, 0, &s, sizeof(s)); |
522ed7767 Audit: add TTY in... |
1366 1367 1368 |
break; } case AUDIT_TTY_SET: { |
a06e56b2a audit: log AUDIT_... |
1369 |
struct audit_tty_status s, old; |
a06e56b2a audit: log AUDIT_... |
1370 |
struct audit_buffer *ab; |
2e28d38ae tty: audit: Handl... |
1371 |
unsigned int t; |
0e23bacca audit: rework AUD... |
1372 1373 1374 1375 1376 1377 1378 1379 |
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_... |
1380 |
|
2e28d38ae tty: audit: Handl... |
1381 1382 1383 1384 1385 |
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... |
1386 |
} |
2e28d38ae tty: audit: Handl... |
1387 1388 |
old.enabled = t & AUDIT_TTY_ENABLE; old.log_passwd = !!(t & AUDIT_TTY_LOG_PASSWD); |
522ed7767 Audit: add TTY in... |
1389 |
|
a06e56b2a audit: log AUDIT_... |
1390 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
1ce319f11 audit: reorder AU... |
1391 1392 1393 1394 |
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_... |
1395 |
audit_log_end(ab); |
522ed7767 Audit: add TTY in... |
1396 1397 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
1398 1399 1400 1401 1402 1403 1404 |
default: err = -EINVAL; break; } return err < 0 ? err : 0; } |
a9d162087 audit: combine au... |
1405 1406 1407 1408 1409 1410 |
/** * 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... |
1411 |
*/ |
a9d162087 audit: combine au... |
1412 |
static void audit_receive(struct sk_buff *skb) |
1da177e4c Linux-2.6.12-rc2 |
1413 |
{ |
ea7ae60bf Audit: clean up a... |
1414 1415 |
struct nlmsghdr *nlh; /* |
941912133 audit: replace ob... |
1416 |
* len MUST be signed for nlmsg_next to be able to dec it below 0 |
ea7ae60bf Audit: clean up a... |
1417 1418 1419 1420 1421 1422 1423 |
* if the nlmsg_len was not aligned */ int len; int err; nlh = nlmsg_hdr(skb); len = skb->len; |
a9d162087 audit: combine au... |
1424 |
mutex_lock(&audit_cmd_mutex); |
941912133 audit: replace ob... |
1425 |
while (nlmsg_ok(nlh, len)) { |
ea7ae60bf Audit: clean up a... |
1426 1427 1428 |
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... |
1429 |
netlink_ack(skb, nlh, err, NULL); |
ea7ae60bf Audit: clean up a... |
1430 |
|
2851da570 audit: pass int* ... |
1431 |
nlh = nlmsg_next(nlh, &len); |
1da177e4c Linux-2.6.12-rc2 |
1432 |
} |
f368c07d7 [PATCH] audit: pa... |
1433 |
mutex_unlock(&audit_cmd_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1434 |
} |
3a101b8de audit: add netlin... |
1435 |
/* Run custom bind function on netlink socket group connect or bind requests. */ |
023e2cfa3 netlink/genetlink... |
1436 |
static int audit_bind(struct net *net, int group) |
3a101b8de audit: add netlin... |
1437 1438 1439 1440 1441 1442 |
{ if (!capable(CAP_AUDIT_READ)) return -EPERM; return 0; } |
33faba7fa audit: listen in ... |
1443 |
static int __net_init audit_net_init(struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
1444 |
{ |
a31f2d17b netlink: add netl... |
1445 1446 |
struct netlink_kernel_cfg cfg = { .input = audit_receive, |
3a101b8de audit: add netlin... |
1447 |
.bind = audit_bind, |
451f92163 audit: add netlin... |
1448 1449 |
.flags = NL_CFG_F_NONROOT_RECV, .groups = AUDIT_NLGRP_MAX, |
a31f2d17b netlink: add netl... |
1450 |
}; |
f368c07d7 [PATCH] audit: pa... |
1451 |
|
33faba7fa audit: listen in ... |
1452 |
struct audit_net *aunet = net_generic(net, audit_net_id); |
5b52330bb audit: fix auditd... |
1453 1454 |
aunet->sk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg); if (aunet->sk == NULL) { |
33faba7fa audit: listen in ... |
1455 |
audit_panic("cannot initialize netlink socket in namespace"); |
11ee39ebf audit: print erro... |
1456 1457 |
return -ENOMEM; } |
5b52330bb audit: fix auditd... |
1458 |
aunet->sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; |
33faba7fa audit: listen in ... |
1459 1460 1461 1462 1463 1464 |
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... |
1465 |
|
48d0e023a audit: fix the RC... |
1466 1467 1468 1469 1470 |
/* 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 ... |
1471 |
|
5b52330bb audit: fix auditd... |
1472 |
netlink_kernel_release(aunet->sk); |
33faba7fa audit: listen in ... |
1473 |
} |
8626877b5 audit: fix locati... |
1474 |
static struct pernet_operations audit_net_ops __net_initdata = { |
33faba7fa audit: listen in ... |
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 |
.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... |
1485 1486 |
if (audit_initialized == AUDIT_DISABLED) return 0; |
8cc96382d audit: use kmem_c... |
1487 1488 1489 |
audit_buffer_cache = kmem_cache_create("audit_buffer", sizeof(struct audit_buffer), 0, SLAB_PANIC, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1490 |
|
af8b824f2 audit: rename the... |
1491 |
skb_queue_head_init(&audit_queue); |
c6480207f audit: rework the... |
1492 |
skb_queue_head_init(&audit_retry_queue); |
af8b824f2 audit: rename the... |
1493 |
skb_queue_head_init(&audit_hold_queue); |
3dc7e3153 [PATCH] support f... |
1494 |
|
f368c07d7 [PATCH] audit: pa... |
1495 1496 |
for (i = 0; i < AUDIT_INODE_BUCKETS; i++) INIT_LIST_HEAD(&audit_inode_hash[i]); |
f368c07d7 [PATCH] audit: pa... |
1497 |
|
5b52330bb audit: fix auditd... |
1498 1499 1500 1501 1502 1503 |
pr_info("initializing netlink subsys (%s) ", audit_default ? "enabled" : "disabled"); register_pernet_subsys(&audit_net_ops); audit_initialized = AUDIT_INITIALIZED; |
5b52330bb audit: fix auditd... |
1504 |
|
6c9255645 audit: fixup audi... |
1505 1506 1507 1508 1509 1510 |
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... |
1511 1512 1513 |
audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "state=initialized audit_enabled=%u res=1", audit_enabled); |
6c9255645 audit: fixup audi... |
1514 |
|
1da177e4c Linux-2.6.12-rc2 |
1515 1516 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1517 1518 1519 1520 1521 1522 |
__initcall(audit_init); /* Process kernel command-line parameter at boot time. audit=0 or audit=1. */ static int __init audit_enable(char *str) { audit_default = !!simple_strtol(str, NULL, 0); |
a3f07114e [PATCH] Audit: ma... |
1523 1524 |
if (!audit_default) audit_initialized = AUDIT_DISABLED; |
0ad0bb601 audit: ensure tha... |
1525 1526 |
audit_enabled = audit_default; audit_ever_enabled = !!audit_enabled; |
a3f07114e [PATCH] Audit: ma... |
1527 |
|
d957f7b72 audit: Use more c... |
1528 1529 |
pr_info("%s ", audit_default ? |
d3ca0344b audit: remove use... |
1530 |
"enabled (after initialization)" : "disabled (until reboot)"); |
a3f07114e [PATCH] Audit: ma... |
1531 |
|
9b41046cd [PATCH] Don't pas... |
1532 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
1533 |
} |
1da177e4c Linux-2.6.12-rc2 |
1534 |
__setup("audit=", audit_enable); |
f910fde73 audit: add kernel... |
1535 1536 1537 1538 |
/* 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... |
1539 |
u32 audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1540 |
|
f910fde73 audit: add kernel... |
1541 |
pr_info("audit_backlog_limit: "); |
3e1d0bb62 audit: Convert in... |
1542 1543 1544 |
if (kstrtouint(str, 0, &audit_backlog_limit_arg)) { pr_cont("using default of %u, unable to parse %s ", |
d957f7b72 audit: Use more c... |
1545 |
audit_backlog_limit, str); |
f910fde73 audit: add kernel... |
1546 1547 |
return 1; } |
3e1d0bb62 audit: Convert in... |
1548 1549 |
audit_backlog_limit = audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1550 1551 |
pr_cont("%d ", audit_backlog_limit); |
f910fde73 audit: add kernel... |
1552 1553 1554 1555 |
return 1; } __setup("audit_backlog_limit=", audit_backlog_limit_set); |
16e1904e6 AUDIT: Add helper... |
1556 1557 |
static void audit_buffer_free(struct audit_buffer *ab) { |
8fc6115c2 AUDIT: expand aud... |
1558 1559 |
if (!ab) return; |
d865e573b audit: Delete unn... |
1560 |
kfree_skb(ab->skb); |
8cc96382d audit: use kmem_c... |
1561 |
kmem_cache_free(audit_buffer_cache, ab); |
16e1904e6 AUDIT: Add helper... |
1562 |
} |
8cc96382d audit: use kmem_c... |
1563 1564 |
static struct audit_buffer *audit_buffer_alloc(struct audit_context *ctx, gfp_t gfp_mask, int type) |
16e1904e6 AUDIT: Add helper... |
1565 |
{ |
8cc96382d audit: use kmem_c... |
1566 |
struct audit_buffer *ab; |
8fc6115c2 AUDIT: expand aud... |
1567 |
|
8cc96382d audit: use kmem_c... |
1568 1569 1570 |
ab = kmem_cache_alloc(audit_buffer_cache, gfp_mask); if (!ab) return NULL; |
ee080e6ce Audit: cleanup ne... |
1571 1572 1573 |
ab->skb = nlmsg_new(AUDIT_BUFSIZ, gfp_mask); if (!ab->skb) |
c64e66c67 audit: netlink: M... |
1574 |
goto err; |
8cc96382d audit: use kmem_c... |
1575 1576 |
if (!nlmsg_put(ab->skb, 0, 0, type, 0, 0)) goto err; |
ee080e6ce Audit: cleanup ne... |
1577 |
|
8cc96382d audit: use kmem_c... |
1578 1579 |
ab->ctx = ctx; ab->gfp_mask = gfp_mask; |
ee080e6ce Audit: cleanup ne... |
1580 |
|
16e1904e6 AUDIT: Add helper... |
1581 |
return ab; |
ee080e6ce Audit: cleanup ne... |
1582 |
|
8fc6115c2 AUDIT: expand aud... |
1583 1584 1585 |
err: audit_buffer_free(ab); return NULL; |
16e1904e6 AUDIT: Add helper... |
1586 |
} |
1da177e4c Linux-2.6.12-rc2 |
1587 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1588 1589 1590 1591 |
/** * 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... |
1592 1593 1594 1595 1596 1597 1598 |
* 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... |
1599 1600 1601 1602 |
* 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... |
1603 1604 |
* halts). */ |
bfb4496e7 AUDIT: Assign ser... |
1605 1606 |
unsigned int audit_serial(void) { |
01478d7d6 audit: use atomic... |
1607 |
static atomic_t serial = ATOMIC_INIT(0); |
d5b454f2c AUDIT: Fix livelo... |
1608 |
|
01478d7d6 audit: use atomic... |
1609 |
return atomic_add_return(1, &serial); |
bfb4496e7 AUDIT: Assign ser... |
1610 |
} |
5600b8927 whitespace fixes:... |
1611 |
static inline void audit_get_stamp(struct audit_context *ctx, |
2115bb250 audit: Use timesp... |
1612 |
struct timespec64 *t, unsigned int *serial) |
bfb4496e7 AUDIT: Assign ser... |
1613 |
{ |
48887e63d [PATCH] fix broke... |
1614 |
if (!ctx || !auditsc_get_stamp(ctx, t, serial)) { |
e832bf48c audit: Reduce ove... |
1615 |
*t = current_kernel_time64(); |
bfb4496e7 AUDIT: Assign ser... |
1616 1617 1618 |
*serial = audit_serial(); } } |
b0dd25a82 [PATCH] AUDIT: ke... |
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 |
/** * 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... |
1634 |
struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, |
9ad9ad385 AUDIT: Wait for b... |
1635 |
int type) |
1da177e4c Linux-2.6.12-rc2 |
1636 |
{ |
319754248 audit: rework aud... |
1637 |
struct audit_buffer *ab; |
2115bb250 audit: Use timesp... |
1638 |
struct timespec64 t; |
319754248 audit: rework aud... |
1639 |
unsigned int uninitialized_var(serial); |
1da177e4c Linux-2.6.12-rc2 |
1640 |
|
a3f07114e [PATCH] Audit: ma... |
1641 |
if (audit_initialized != AUDIT_INITIALIZED) |
1da177e4c Linux-2.6.12-rc2 |
1642 |
return NULL; |
86b2efbe3 audit: add fields... |
1643 |
if (unlikely(!audit_filter(type, AUDIT_FILTER_TYPE))) |
c8edc80c8 [PATCH] Exclude m... |
1644 |
return NULL; |
5b52330bb audit: fix auditd... |
1645 |
/* NOTE: don't ever fail/sleep on these two conditions: |
a09cfa470 audit: don't ever... |
1646 1647 1648 1649 |
* 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... |
1650 1651 1652 1653 1654 |
* 2. generator holding the audit_cmd_mutex - we don't want to block * while holding the mutex */ if (!(auditd_test_task(current) || (current == __mutex_owner(&audit_cmd_mutex)))) { long stime = audit_backlog_wait_time; |
319754248 audit: rework aud... |
1655 1656 1657 1658 1659 |
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... |
1660 |
|
319754248 audit: rework aud... |
1661 1662 |
/* sleep if we are allowed and we haven't exhausted our * backlog wait limit */ |
5b52330bb audit: fix auditd... |
1663 |
if (gfpflags_allow_blocking(gfp_mask) && (stime > 0)) { |
319754248 audit: rework aud... |
1664 1665 1666 1667 1668 |
DECLARE_WAITQUEUE(wait, current); add_wait_queue_exclusive(&audit_backlog_wait, &wait); set_current_state(TASK_UNINTERRUPTIBLE); |
5b52330bb audit: fix auditd... |
1669 |
stime = schedule_timeout(stime); |
319754248 audit: rework aud... |
1670 1671 1672 1673 1674 1675 1676 1677 1678 |
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... |
1679 |
} |
9ad9ad385 AUDIT: Wait for b... |
1680 |
} |
fb19b4c6a AUDIT: Honour aud... |
1681 |
} |
9ad9ad385 AUDIT: Wait for b... |
1682 |
ab = audit_buffer_alloc(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
1683 1684 1685 1686 |
if (!ab) { audit_log_lost("out of memory in audit_log_start"); return NULL; } |
bfb4496e7 AUDIT: Assign ser... |
1687 |
audit_get_stamp(ab->ctx, &t, &serial); |
2115bb250 audit: Use timesp... |
1688 1689 |
audit_log_format(ab, "audit(%llu.%03lu:%u): ", (unsigned long long)t.tv_sec, t.tv_nsec/1000000, serial); |
319754248 audit: rework aud... |
1690 |
|
1da177e4c Linux-2.6.12-rc2 |
1691 1692 |
return ab; } |
8fc6115c2 AUDIT: expand aud... |
1693 |
/** |
5ac52f33b AUDIT: buffer aud... |
1694 |
* audit_expand - expand skb in the audit buffer |
8fc6115c2 AUDIT: expand aud... |
1695 |
* @ab: audit_buffer |
b0dd25a82 [PATCH] AUDIT: ke... |
1696 |
* @extra: space to add at tail of the skb |
8fc6115c2 AUDIT: expand aud... |
1697 1698 1699 1700 |
* * Returns 0 (no space) on failed expansion, or available space if * successful. */ |
e3b926b4c AUDIT: pass size ... |
1701 |
static inline int audit_expand(struct audit_buffer *ab, int extra) |
8fc6115c2 AUDIT: expand aud... |
1702 |
{ |
5ac52f33b AUDIT: buffer aud... |
1703 |
struct sk_buff *skb = ab->skb; |
406a1d868 [AUDIT]: Increase... |
1704 1705 1706 |
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... |
1707 1708 |
if (ret < 0) { audit_log_lost("out of memory in audit_expand"); |
8fc6115c2 AUDIT: expand aud... |
1709 |
return 0; |
5ac52f33b AUDIT: buffer aud... |
1710 |
} |
406a1d868 [AUDIT]: Increase... |
1711 1712 1713 |
skb->truesize += newtail - oldtail; return newtail; |
8fc6115c2 AUDIT: expand aud... |
1714 |
} |
1da177e4c Linux-2.6.12-rc2 |
1715 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1716 1717 |
/* * Format an audit message into the audit buffer. If there isn't enough |
1da177e4c Linux-2.6.12-rc2 |
1718 1719 |
* 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... |
1720 1721 |
* can't format message larger than 1024 bytes, so we don't either. */ |
1da177e4c Linux-2.6.12-rc2 |
1722 1723 1724 1725 |
static void audit_log_vformat(struct audit_buffer *ab, const char *fmt, va_list args) { int len, avail; |
5ac52f33b AUDIT: buffer aud... |
1726 |
struct sk_buff *skb; |
eecb0a733 AUDIT: Fix abuse ... |
1727 |
va_list args2; |
1da177e4c Linux-2.6.12-rc2 |
1728 1729 1730 |
if (!ab) return; |
5ac52f33b AUDIT: buffer aud... |
1731 1732 1733 1734 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); if (avail == 0) { |
e3b926b4c AUDIT: pass size ... |
1735 |
avail = audit_expand(ab, AUDIT_BUFSIZ); |
8fc6115c2 AUDIT: expand aud... |
1736 1737 |
if (!avail) goto out; |
1da177e4c Linux-2.6.12-rc2 |
1738 |
} |
eecb0a733 AUDIT: Fix abuse ... |
1739 |
va_copy(args2, args); |
27a884dc3 [SK_BUFF]: Conver... |
1740 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1741 1742 1743 1744 |
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... |
1745 1746 |
avail = audit_expand(ab, max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail)); |
8fc6115c2 AUDIT: expand aud... |
1747 |
if (!avail) |
a0e86bd42 audit: always fol... |
1748 |
goto out_va_end; |
27a884dc3 [SK_BUFF]: Conver... |
1749 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2); |
1da177e4c Linux-2.6.12-rc2 |
1750 |
} |
168b71739 AUDIT: Clean up l... |
1751 1752 |
if (len > 0) skb_put(skb, len); |
a0e86bd42 audit: always fol... |
1753 1754 |
out_va_end: va_end(args2); |
8fc6115c2 AUDIT: expand aud... |
1755 1756 |
out: return; |
1da177e4c Linux-2.6.12-rc2 |
1757 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
1758 1759 1760 1761 1762 1763 1764 1765 |
/** * 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 |
1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 |
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... |
1776 |
/** |
196a50855 audit: update the... |
1777 |
* audit_log_n_hex - convert a buffer to hex and append it to the audit skb |
b0dd25a82 [PATCH] AUDIT: ke... |
1778 1779 1780 1781 1782 1783 1784 1785 1786 |
* @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... |
1787 |
void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf, |
168b71739 AUDIT: Clean up l... |
1788 |
size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1789 |
{ |
168b71739 AUDIT: Clean up l... |
1790 1791 1792 |
int i, avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
168b71739 AUDIT: Clean up l... |
1793 |
|
8ef2d3040 [PATCH] sanity ch... |
1794 1795 |
if (!ab) return; |
168b71739 AUDIT: Clean up l... |
1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 |
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 ... |
1807 |
|
27a884dc3 [SK_BUFF]: Conver... |
1808 |
ptr = skb_tail_pointer(skb); |
b8dbc3241 audit: Use hex_by... |
1809 1810 |
for (i = 0; i < len; i++) ptr = hex_byte_pack_upper(ptr, buf[i]); |
168b71739 AUDIT: Clean up l... |
1811 1812 |
*ptr = 0; skb_put(skb, len << 1); /* new string is twice the old string */ |
83c7d0917 AUDIT: Avoid log ... |
1813 |
} |
9c937dcc7 [PATCH] log more ... |
1814 1815 1816 1817 |
/* * Format a string of no more than slen characters into the audit buffer, * enclosed in quote marks. */ |
b556f8ad5 Audit: standardiz... |
1818 1819 |
void audit_log_n_string(struct audit_buffer *ab, const char *string, size_t slen) |
9c937dcc7 [PATCH] log more ... |
1820 1821 1822 1823 |
{ int avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
8ef2d3040 [PATCH] sanity ch... |
1824 1825 |
if (!ab) return; |
9c937dcc7 [PATCH] log more ... |
1826 1827 1828 1829 1830 1831 1832 1833 1834 |
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... |
1835 |
ptr = skb_tail_pointer(skb); |
9c937dcc7 [PATCH] log more ... |
1836 1837 1838 1839 1840 1841 1842 |
*ptr++ = '"'; memcpy(ptr, string, slen); ptr += slen; *ptr++ = '"'; *ptr = 0; skb_put(skb, slen + 2); /* don't include null terminator */ } |
b0dd25a82 [PATCH] AUDIT: ke... |
1843 |
/** |
de6bbd1d3 [AUDIT] break lar... |
1844 |
* audit_string_contains_control - does a string need to be logged in hex |
f706d5d22 audit: silence tw... |
1845 1846 |
* @string: string to be checked * @len: max length of the string to check |
de6bbd1d3 [AUDIT] break lar... |
1847 |
*/ |
9fcf836b2 audit: audit_stri... |
1848 |
bool audit_string_contains_control(const char *string, size_t len) |
de6bbd1d3 [AUDIT] break lar... |
1849 1850 |
{ const unsigned char *p; |
b3897f567 Audit: fix handli... |
1851 |
for (p = string; p < (const unsigned char *)string + len; p++) { |
1d6c9649e kernel/audit.c co... |
1852 |
if (*p == '"' || *p < 0x21 || *p > 0x7e) |
9fcf836b2 audit: audit_stri... |
1853 |
return true; |
de6bbd1d3 [AUDIT] break lar... |
1854 |
} |
9fcf836b2 audit: audit_stri... |
1855 |
return false; |
de6bbd1d3 [AUDIT] break lar... |
1856 1857 1858 |
} /** |
522ed7767 Audit: add TTY in... |
1859 |
* audit_log_n_untrustedstring - log a string that may contain random characters |
b0dd25a82 [PATCH] AUDIT: ke... |
1860 |
* @ab: audit_buffer |
f706d5d22 audit: silence tw... |
1861 |
* @len: length of string (not including trailing null) |
b0dd25a82 [PATCH] AUDIT: ke... |
1862 1863 1864 1865 |
* @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... |
1866 |
* or a space. Unescaped strings will start and end with a double quote mark. |
b0dd25a82 [PATCH] AUDIT: ke... |
1867 |
* Strings that are escaped are printed in hex (2 digits per char). |
9c937dcc7 [PATCH] log more ... |
1868 1869 1870 |
* * 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... |
1871 |
*/ |
b556f8ad5 Audit: standardiz... |
1872 1873 |
void audit_log_n_untrustedstring(struct audit_buffer *ab, const char *string, size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1874 |
{ |
de6bbd1d3 [AUDIT] break lar... |
1875 |
if (audit_string_contains_control(string, len)) |
b556f8ad5 Audit: standardiz... |
1876 |
audit_log_n_hex(ab, string, len); |
de6bbd1d3 [AUDIT] break lar... |
1877 |
else |
b556f8ad5 Audit: standardiz... |
1878 |
audit_log_n_string(ab, string, len); |
83c7d0917 AUDIT: Avoid log ... |
1879 |
} |
9c937dcc7 [PATCH] log more ... |
1880 |
/** |
522ed7767 Audit: add TTY in... |
1881 |
* audit_log_untrustedstring - log a string that may contain random characters |
9c937dcc7 [PATCH] log more ... |
1882 1883 1884 |
* @ab: audit_buffer * @string: string to be logged * |
522ed7767 Audit: add TTY in... |
1885 |
* Same as audit_log_n_untrustedstring(), except that strlen is used to |
9c937dcc7 [PATCH] log more ... |
1886 1887 |
* determine string length. */ |
de6bbd1d3 [AUDIT] break lar... |
1888 |
void audit_log_untrustedstring(struct audit_buffer *ab, const char *string) |
9c937dcc7 [PATCH] log more ... |
1889 |
{ |
b556f8ad5 Audit: standardiz... |
1890 |
audit_log_n_untrustedstring(ab, string, strlen(string)); |
9c937dcc7 [PATCH] log more ... |
1891 |
} |
168b71739 AUDIT: Clean up l... |
1892 |
/* This is a helper-function to print the escaped d_path */ |
1da177e4c Linux-2.6.12-rc2 |
1893 |
void audit_log_d_path(struct audit_buffer *ab, const char *prefix, |
66b3fad3f constify path arg... |
1894 |
const struct path *path) |
1da177e4c Linux-2.6.12-rc2 |
1895 |
{ |
44707fdf5 d_path: Use struc... |
1896 |
char *p, *pathname; |
1da177e4c Linux-2.6.12-rc2 |
1897 |
|
8fc6115c2 AUDIT: expand aud... |
1898 |
if (prefix) |
c158a35c8 audit: no leading... |
1899 |
audit_log_format(ab, "%s", prefix); |
1da177e4c Linux-2.6.12-rc2 |
1900 |
|
168b71739 AUDIT: Clean up l... |
1901 |
/* We will allow 11 spaces for ' (deleted)' to be appended */ |
44707fdf5 d_path: Use struc... |
1902 1903 |
pathname = kmalloc(PATH_MAX+11, ab->gfp_mask); if (!pathname) { |
def575434 Audit: remove spa... |
1904 |
audit_log_string(ab, "<no_memory>"); |
168b71739 AUDIT: Clean up l... |
1905 |
return; |
1da177e4c Linux-2.6.12-rc2 |
1906 |
} |
cf28b4863 d_path: Make d_pa... |
1907 |
p = d_path(path, pathname, PATH_MAX+11); |
168b71739 AUDIT: Clean up l... |
1908 1909 |
if (IS_ERR(p)) { /* Should never happen since we send PATH_MAX */ /* FIXME: can we save some information here? */ |
def575434 Audit: remove spa... |
1910 |
audit_log_string(ab, "<too_long>"); |
5600b8927 whitespace fixes:... |
1911 |
} else |
168b71739 AUDIT: Clean up l... |
1912 |
audit_log_untrustedstring(ab, p); |
44707fdf5 d_path: Use struc... |
1913 |
kfree(pathname); |
1da177e4c Linux-2.6.12-rc2 |
1914 |
} |
4d3fb709b helper for some s... |
1915 1916 |
void audit_log_session_info(struct audit_buffer *ab) { |
4440e8548 audit: convert al... |
1917 |
unsigned int sessionid = audit_get_sessionid(current); |
4d3fb709b helper for some s... |
1918 |
uid_t auid = from_kuid(&init_user_ns, audit_get_loginuid(current)); |
b8f89caaf audit: remove new... |
1919 |
audit_log_format(ab, " auid=%u ses=%u", auid, sessionid); |
4d3fb709b helper for some s... |
1920 |
} |
9d9609851 Audit: clean up a... |
1921 1922 1923 1924 1925 1926 1927 1928 |
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 ... |
1929 1930 1931 1932 1933 1934 1935 |
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... |
1936 |
cap->cap[CAP_LAST_U32 - i]); |
b24a30a73 audit: fix event ... |
1937 1938 |
} } |
691e6d59d audit: reduce sco... |
1939 |
static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name) |
b24a30a73 audit: fix event ... |
1940 |
{ |
4b3e4ed6b audit: unswing ca... |
1941 1942 1943 1944 |
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 ... |
1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 |
} 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... |
1971 |
struct inode *inode) |
b24a30a73 audit: fix event ... |
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 |
{ 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... |
1992 |
const struct path *path, int record_num, int *call_panic) |
b24a30a73 audit: fix event ... |
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 |
{ 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... |
2023 |
if (n->ino != AUDIT_INO_UNSET) |
b24a30a73 audit: fix event ... |
2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 |
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 ... |
2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 |
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... |
2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 |
/* 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 ... |
2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 |
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... |
2098 2099 2100 |
void audit_log_d_path_exe(struct audit_buffer *ab, struct mm_struct *mm) { |
5b2825527 audit: reduce mma... |
2101 2102 2103 2104 |
struct file *exe_file; if (!mm) goto out_null; |
4766b199e audit: consolidat... |
2105 |
|
5b2825527 audit: reduce mma... |
2106 2107 2108 2109 2110 2111 2112 2113 2114 |
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... |
2115 |
} |
3f5be2da8 audit: move audit... |
2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 |
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 ... |
2132 2133 2134 |
void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) { const struct cred *cred; |
9eab339b1 audit: get comm u... |
2135 |
char comm[sizeof(tsk->comm)]; |
db0a6fb5d audit: add tty fi... |
2136 |
struct tty_struct *tty; |
b24a30a73 audit: fix event ... |
2137 2138 2139 2140 2141 2142 |
if (!ab) return; /* tsk == current */ cred = current_cred(); |
db0a6fb5d audit: add tty fi... |
2143 |
tty = audit_get_tty(tsk); |
b24a30a73 audit: fix event ... |
2144 |
audit_log_format(ab, |
c92cdeb45 audit: convert PP... |
2145 |
" ppid=%d pid=%d auid=%u uid=%u gid=%u" |
b24a30a73 audit: fix event ... |
2146 |
" euid=%u suid=%u fsuid=%u" |
2f2ad1013 audit: restore or... |
2147 |
" egid=%u sgid=%u fsgid=%u tty=%s ses=%u", |
c92cdeb45 audit: convert PP... |
2148 |
task_ppid_nr(tsk), |
fa2bea2f5 audit: consistent... |
2149 |
task_tgid_nr(tsk), |
b24a30a73 audit: fix event ... |
2150 2151 2152 2153 2154 2155 2156 2157 2158 |
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... |
2159 2160 2161 |
tty ? tty_name(tty) : "(none)", audit_get_sessionid(tsk)); audit_put_tty(tty); |
b24a30a73 audit: fix event ... |
2162 |
audit_log_format(ab, " comm="); |
9eab339b1 audit: get comm u... |
2163 |
audit_log_untrustedstring(ab, get_task_comm(comm, tsk)); |
4766b199e audit: consolidat... |
2164 |
audit_log_d_path_exe(ab, tsk->mm); |
b24a30a73 audit: fix event ... |
2165 2166 2167 |
audit_log_task_context(ab); } EXPORT_SYMBOL(audit_log_task_info); |
b0dd25a82 [PATCH] AUDIT: ke... |
2168 |
/** |
a51d9eaa4 fs: add link rest... |
2169 |
* audit_log_link_denied - report a link restriction denial |
220119647 audit: fix for ty... |
2170 |
* @operation: specific link operation |
a51d9eaa4 fs: add link rest... |
2171 2172 |
* @link: the path that triggered the restriction */ |
8bd107633 audit_log_{name,l... |
2173 |
void audit_log_link_denied(const char *operation, const struct path *link) |
a51d9eaa4 fs: add link rest... |
2174 2175 |
{ struct audit_buffer *ab; |
b24a30a73 audit: fix event ... |
2176 2177 2178 2179 2180 |
struct audit_names *name; name = kzalloc(sizeof(*name), GFP_NOFS); if (!name) return; |
a51d9eaa4 fs: add link rest... |
2181 |
|
b24a30a73 audit: fix event ... |
2182 |
/* Generate AUDIT_ANOM_LINK with subject, operation, outcome. */ |
a51d9eaa4 fs: add link rest... |
2183 2184 |
ab = audit_log_start(current->audit_context, GFP_KERNEL, AUDIT_ANOM_LINK); |
d1c7d97ad fs: handle failed... |
2185 |
if (!ab) |
b24a30a73 audit: fix event ... |
2186 2187 2188 2189 |
goto out; audit_log_format(ab, "op=%s", operation); audit_log_task_info(ab, current); audit_log_format(ab, " res=0"); |
a51d9eaa4 fs: add link rest... |
2190 |
audit_log_end(ab); |
b24a30a73 audit: fix event ... |
2191 2192 2193 |
/* Generate AUDIT_PATH record with object. */ name->type = AUDIT_TYPE_NORMAL; |
3b362157b VFS: audit: d_bac... |
2194 |
audit_copy_inode(name, link->dentry, d_backing_inode(link->dentry)); |
b24a30a73 audit: fix event ... |
2195 2196 2197 |
audit_log_name(current->audit_context, name, link, 0, NULL); out: kfree(name); |
a51d9eaa4 fs: add link rest... |
2198 2199 2200 |
} /** |
b0dd25a82 [PATCH] AUDIT: ke... |
2201 2202 2203 |
* audit_log_end - end one audit record * @ab: the audit_buffer * |
4aa83872d audit: queue netl... |
2204 2205 2206 2207 |
* 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... |
2208 |
*/ |
b7d112581 AUDIT: Send netli... |
2209 |
void audit_log_end(struct audit_buffer *ab) |
1da177e4c Linux-2.6.12-rc2 |
2210 |
{ |
5b52330bb audit: fix auditd... |
2211 2212 |
struct sk_buff *skb; struct nlmsghdr *nlh; |
1da177e4c Linux-2.6.12-rc2 |
2213 2214 |
if (!ab) return; |
5b52330bb audit: fix auditd... |
2215 2216 2217 |
if (audit_rate_check()) { skb = ab->skb; |
f3d357b09 Audit: save audit... |
2218 |
ab->skb = NULL; |
5b52330bb audit: fix auditd... |
2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 |
/* 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... |
2230 |
audit_buffer_free(ab); |
1da177e4c Linux-2.6.12-rc2 |
2231 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 |
/** * 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:... |
2244 |
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type, |
9ad9ad385 AUDIT: Wait for b... |
2245 |
const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
2246 2247 2248 |
{ struct audit_buffer *ab; va_list args; |
9ad9ad385 AUDIT: Wait for b... |
2249 |
ab = audit_log_start(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
2250 2251 2252 2253 2254 2255 2256 |
if (ab) { va_start(args, fmt); audit_log_vformat(ab, fmt, args); va_end(args); audit_log_end(ab); } } |
bf45da97a [PATCH] EXPORT_SY... |
2257 |
|
131ad62d8 netfilter: add SE... |
2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 |
#ifdef CONFIG_SECURITY /** * audit_log_secctx - Converts and logs SELinux context * @ab: audit_buffer * @secid: security number * * This is a helper function that calls security_secid_to_secctx to convert * secid to secctx and then adds the (converted) SELinux context to the audit * log by calling audit_log_format, thus also preventing leak of internal secid * to userspace. If secid cannot be converted audit_panic is called. */ void audit_log_secctx(struct audit_buffer *ab, u32 secid) { u32 len; char *secctx; if (security_secid_to_secctx(secid, &secctx, &len)) { audit_panic("Cannot convert secid to context"); } else { audit_log_format(ab, " obj=%s", secctx); security_release_secctx(secctx, len); } } EXPORT_SYMBOL(audit_log_secctx); #endif |
bf45da97a [PATCH] EXPORT_SY... |
2283 2284 2285 2286 |
EXPORT_SYMBOL(audit_log_start); EXPORT_SYMBOL(audit_log_end); EXPORT_SYMBOL(audit_log_format); EXPORT_SYMBOL(audit_log); |