Commit | Line | Data |
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85c8721f | 1 | /* auditsc.c -- System-call auditing support |
1da177e4 LT |
2 | * Handles all system-call specific auditing features. |
3 | * | |
4 | * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina. | |
73241ccc | 5 | * Copyright 2005 Hewlett-Packard Development Company, L.P. |
20ca73bc | 6 | * Copyright (C) 2005, 2006 IBM Corporation |
1da177e4 LT |
7 | * All Rights Reserved. |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | * Written by Rickard E. (Rik) Faith <faith@redhat.com> | |
24 | * | |
25 | * Many of the ideas implemented here are from Stephen C. Tweedie, | |
26 | * especially the idea of avoiding a copy by using getname. | |
27 | * | |
28 | * The method for actual interception of syscall entry and exit (not in | |
29 | * this file -- see entry.S) is based on a GPL'd patch written by | |
30 | * okir@suse.de and Copyright 2003 SuSE Linux AG. | |
31 | * | |
20ca73bc GW |
32 | * POSIX message queue support added by George Wilson <ltcgcw@us.ibm.com>, |
33 | * 2006. | |
34 | * | |
b63862f4 DK |
35 | * The support of additional filter rules compares (>, <, >=, <=) was |
36 | * added by Dustin Kirkland <dustin.kirkland@us.ibm.com>, 2005. | |
37 | * | |
73241ccc AG |
38 | * Modified by Amy Griffis <amy.griffis@hp.com> to collect additional |
39 | * filesystem information. | |
8c8570fb DK |
40 | * |
41 | * Subject and object context labeling support added by <danjones@us.ibm.com> | |
42 | * and <dustin.kirkland@us.ibm.com> for LSPP certification compliance. | |
1da177e4 LT |
43 | */ |
44 | ||
45 | #include <linux/init.h> | |
1da177e4 | 46 | #include <asm/types.h> |
715b49ef | 47 | #include <asm/atomic.h> |
73241ccc AG |
48 | #include <asm/types.h> |
49 | #include <linux/fs.h> | |
50 | #include <linux/namei.h> | |
1da177e4 LT |
51 | #include <linux/mm.h> |
52 | #include <linux/module.h> | |
01116105 | 53 | #include <linux/mount.h> |
3ec3b2fb | 54 | #include <linux/socket.h> |
20ca73bc | 55 | #include <linux/mqueue.h> |
1da177e4 LT |
56 | #include <linux/audit.h> |
57 | #include <linux/personality.h> | |
58 | #include <linux/time.h> | |
5bb289b5 | 59 | #include <linux/netlink.h> |
f5561964 | 60 | #include <linux/compiler.h> |
1da177e4 | 61 | #include <asm/unistd.h> |
8c8570fb | 62 | #include <linux/security.h> |
fe7752ba | 63 | #include <linux/list.h> |
a6c043a8 | 64 | #include <linux/tty.h> |
3dc7e315 | 65 | #include <linux/selinux.h> |
473ae30b | 66 | #include <linux/binfmts.h> |
f46038ff | 67 | #include <linux/syscalls.h> |
1da177e4 | 68 | |
fe7752ba | 69 | #include "audit.h" |
1da177e4 | 70 | |
fe7752ba | 71 | extern struct list_head audit_filter_list[]; |
1da177e4 LT |
72 | |
73 | /* No syscall auditing will take place unless audit_enabled != 0. */ | |
74 | extern int audit_enabled; | |
75 | ||
76 | /* AUDIT_NAMES is the number of slots we reserve in the audit_context | |
77 | * for saving names from getname(). */ | |
78 | #define AUDIT_NAMES 20 | |
79 | ||
80 | /* AUDIT_NAMES_RESERVED is the number of slots we reserve in the | |
81 | * audit_context from being used for nameless inodes from | |
82 | * path_lookup. */ | |
83 | #define AUDIT_NAMES_RESERVED 7 | |
84 | ||
1da177e4 LT |
85 | /* When fs/namei.c:getname() is called, we store the pointer in name and |
86 | * we don't let putname() free it (instead we free all of the saved | |
87 | * pointers at syscall exit time). | |
88 | * | |
89 | * Further, in fs/namei.c:path_lookup() we store the inode and device. */ | |
90 | struct audit_names { | |
91 | const char *name; | |
92 | unsigned long ino; | |
73241ccc | 93 | unsigned long pino; |
1da177e4 LT |
94 | dev_t dev; |
95 | umode_t mode; | |
96 | uid_t uid; | |
97 | gid_t gid; | |
98 | dev_t rdev; | |
1b50eed9 | 99 | u32 osid; |
1da177e4 LT |
100 | }; |
101 | ||
102 | struct audit_aux_data { | |
103 | struct audit_aux_data *next; | |
104 | int type; | |
105 | }; | |
106 | ||
107 | #define AUDIT_AUX_IPCPERM 0 | |
108 | ||
20ca73bc GW |
109 | struct audit_aux_data_mq_open { |
110 | struct audit_aux_data d; | |
111 | int oflag; | |
112 | mode_t mode; | |
113 | struct mq_attr attr; | |
114 | }; | |
115 | ||
116 | struct audit_aux_data_mq_sendrecv { | |
117 | struct audit_aux_data d; | |
118 | mqd_t mqdes; | |
119 | size_t msg_len; | |
120 | unsigned int msg_prio; | |
121 | struct timespec abs_timeout; | |
122 | }; | |
123 | ||
124 | struct audit_aux_data_mq_notify { | |
125 | struct audit_aux_data d; | |
126 | mqd_t mqdes; | |
127 | struct sigevent notification; | |
128 | }; | |
129 | ||
130 | struct audit_aux_data_mq_getsetattr { | |
131 | struct audit_aux_data d; | |
132 | mqd_t mqdes; | |
133 | struct mq_attr mqstat; | |
134 | }; | |
135 | ||
1da177e4 LT |
136 | struct audit_aux_data_ipcctl { |
137 | struct audit_aux_data d; | |
138 | struct ipc_perm p; | |
139 | unsigned long qbytes; | |
140 | uid_t uid; | |
141 | gid_t gid; | |
142 | mode_t mode; | |
9c7aa6aa | 143 | u32 osid; |
1da177e4 LT |
144 | }; |
145 | ||
473ae30b AV |
146 | struct audit_aux_data_execve { |
147 | struct audit_aux_data d; | |
148 | int argc; | |
149 | int envc; | |
150 | char mem[0]; | |
151 | }; | |
152 | ||
3ec3b2fb DW |
153 | struct audit_aux_data_socketcall { |
154 | struct audit_aux_data d; | |
155 | int nargs; | |
156 | unsigned long args[0]; | |
157 | }; | |
158 | ||
159 | struct audit_aux_data_sockaddr { | |
160 | struct audit_aux_data d; | |
161 | int len; | |
162 | char a[0]; | |
163 | }; | |
164 | ||
01116105 SS |
165 | struct audit_aux_data_path { |
166 | struct audit_aux_data d; | |
167 | struct dentry *dentry; | |
168 | struct vfsmount *mnt; | |
169 | }; | |
1da177e4 LT |
170 | |
171 | /* The per-task audit context. */ | |
172 | struct audit_context { | |
173 | int in_syscall; /* 1 if task is in a syscall */ | |
174 | enum audit_state state; | |
175 | unsigned int serial; /* serial number for record */ | |
176 | struct timespec ctime; /* time of syscall entry */ | |
177 | uid_t loginuid; /* login uid (identity) */ | |
178 | int major; /* syscall number */ | |
179 | unsigned long argv[4]; /* syscall arguments */ | |
180 | int return_valid; /* return code is valid */ | |
2fd6f58b | 181 | long return_code;/* syscall return code */ |
1da177e4 LT |
182 | int auditable; /* 1 if record should be written */ |
183 | int name_count; | |
184 | struct audit_names names[AUDIT_NAMES]; | |
8f37d47c DW |
185 | struct dentry * pwd; |
186 | struct vfsmount * pwdmnt; | |
1da177e4 LT |
187 | struct audit_context *previous; /* For nested syscalls */ |
188 | struct audit_aux_data *aux; | |
189 | ||
190 | /* Save things to print about task_struct */ | |
f46038ff | 191 | pid_t pid, ppid; |
1da177e4 LT |
192 | uid_t uid, euid, suid, fsuid; |
193 | gid_t gid, egid, sgid, fsgid; | |
194 | unsigned long personality; | |
2fd6f58b | 195 | int arch; |
1da177e4 LT |
196 | |
197 | #if AUDIT_DEBUG | |
198 | int put_count; | |
199 | int ino_count; | |
200 | #endif | |
201 | }; | |
202 | ||
1da177e4 LT |
203 | |
204 | /* Compare a task_struct with an audit_rule. Return 1 on match, 0 | |
205 | * otherwise. */ | |
206 | static int audit_filter_rules(struct task_struct *tsk, | |
93315ed6 | 207 | struct audit_krule *rule, |
1da177e4 LT |
208 | struct audit_context *ctx, |
209 | enum audit_state *state) | |
210 | { | |
2ad312d2 | 211 | int i, j, need_sid = 1; |
3dc7e315 DG |
212 | u32 sid; |
213 | ||
1da177e4 | 214 | for (i = 0; i < rule->field_count; i++) { |
93315ed6 | 215 | struct audit_field *f = &rule->fields[i]; |
1da177e4 LT |
216 | int result = 0; |
217 | ||
93315ed6 | 218 | switch (f->type) { |
1da177e4 | 219 | case AUDIT_PID: |
93315ed6 | 220 | result = audit_comparator(tsk->pid, f->op, f->val); |
1da177e4 | 221 | break; |
3c66251e AV |
222 | case AUDIT_PPID: |
223 | if (ctx) | |
224 | result = audit_comparator(ctx->ppid, f->op, f->val); | |
225 | break; | |
1da177e4 | 226 | case AUDIT_UID: |
93315ed6 | 227 | result = audit_comparator(tsk->uid, f->op, f->val); |
1da177e4 LT |
228 | break; |
229 | case AUDIT_EUID: | |
93315ed6 | 230 | result = audit_comparator(tsk->euid, f->op, f->val); |
1da177e4 LT |
231 | break; |
232 | case AUDIT_SUID: | |
93315ed6 | 233 | result = audit_comparator(tsk->suid, f->op, f->val); |
1da177e4 LT |
234 | break; |
235 | case AUDIT_FSUID: | |
93315ed6 | 236 | result = audit_comparator(tsk->fsuid, f->op, f->val); |
1da177e4 LT |
237 | break; |
238 | case AUDIT_GID: | |
93315ed6 | 239 | result = audit_comparator(tsk->gid, f->op, f->val); |
1da177e4 LT |
240 | break; |
241 | case AUDIT_EGID: | |
93315ed6 | 242 | result = audit_comparator(tsk->egid, f->op, f->val); |
1da177e4 LT |
243 | break; |
244 | case AUDIT_SGID: | |
93315ed6 | 245 | result = audit_comparator(tsk->sgid, f->op, f->val); |
1da177e4 LT |
246 | break; |
247 | case AUDIT_FSGID: | |
93315ed6 | 248 | result = audit_comparator(tsk->fsgid, f->op, f->val); |
1da177e4 LT |
249 | break; |
250 | case AUDIT_PERS: | |
93315ed6 | 251 | result = audit_comparator(tsk->personality, f->op, f->val); |
1da177e4 | 252 | break; |
2fd6f58b | 253 | case AUDIT_ARCH: |
b63862f4 | 254 | if (ctx) |
93315ed6 | 255 | result = audit_comparator(ctx->arch, f->op, f->val); |
2fd6f58b | 256 | break; |
1da177e4 LT |
257 | |
258 | case AUDIT_EXIT: | |
259 | if (ctx && ctx->return_valid) | |
93315ed6 | 260 | result = audit_comparator(ctx->return_code, f->op, f->val); |
1da177e4 LT |
261 | break; |
262 | case AUDIT_SUCCESS: | |
b01f2cc1 | 263 | if (ctx && ctx->return_valid) { |
93315ed6 AG |
264 | if (f->val) |
265 | result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS); | |
b01f2cc1 | 266 | else |
93315ed6 | 267 | result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE); |
b01f2cc1 | 268 | } |
1da177e4 LT |
269 | break; |
270 | case AUDIT_DEVMAJOR: | |
271 | if (ctx) { | |
272 | for (j = 0; j < ctx->name_count; j++) { | |
93315ed6 | 273 | if (audit_comparator(MAJOR(ctx->names[j].dev), f->op, f->val)) { |
1da177e4 LT |
274 | ++result; |
275 | break; | |
276 | } | |
277 | } | |
278 | } | |
279 | break; | |
280 | case AUDIT_DEVMINOR: | |
281 | if (ctx) { | |
282 | for (j = 0; j < ctx->name_count; j++) { | |
93315ed6 | 283 | if (audit_comparator(MINOR(ctx->names[j].dev), f->op, f->val)) { |
1da177e4 LT |
284 | ++result; |
285 | break; | |
286 | } | |
287 | } | |
288 | } | |
289 | break; | |
290 | case AUDIT_INODE: | |
291 | if (ctx) { | |
292 | for (j = 0; j < ctx->name_count; j++) { | |
93315ed6 AG |
293 | if (audit_comparator(ctx->names[j].ino, f->op, f->val) || |
294 | audit_comparator(ctx->names[j].pino, f->op, f->val)) { | |
1da177e4 LT |
295 | ++result; |
296 | break; | |
297 | } | |
298 | } | |
299 | } | |
300 | break; | |
301 | case AUDIT_LOGINUID: | |
302 | result = 0; | |
303 | if (ctx) | |
93315ed6 | 304 | result = audit_comparator(ctx->loginuid, f->op, f->val); |
1da177e4 | 305 | break; |
3dc7e315 DG |
306 | case AUDIT_SE_USER: |
307 | case AUDIT_SE_ROLE: | |
308 | case AUDIT_SE_TYPE: | |
309 | case AUDIT_SE_SEN: | |
310 | case AUDIT_SE_CLR: | |
311 | /* NOTE: this may return negative values indicating | |
312 | a temporary error. We simply treat this as a | |
313 | match for now to avoid losing information that | |
314 | may be wanted. An error message will also be | |
315 | logged upon error */ | |
2ad312d2 SG |
316 | if (f->se_rule) { |
317 | if (need_sid) { | |
318 | selinux_task_ctxid(tsk, &sid); | |
319 | need_sid = 0; | |
320 | } | |
3dc7e315 DG |
321 | result = selinux_audit_rule_match(sid, f->type, |
322 | f->op, | |
323 | f->se_rule, | |
324 | ctx); | |
2ad312d2 | 325 | } |
3dc7e315 | 326 | break; |
1da177e4 LT |
327 | case AUDIT_ARG0: |
328 | case AUDIT_ARG1: | |
329 | case AUDIT_ARG2: | |
330 | case AUDIT_ARG3: | |
331 | if (ctx) | |
93315ed6 | 332 | result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val); |
1da177e4 LT |
333 | break; |
334 | } | |
335 | ||
1da177e4 LT |
336 | if (!result) |
337 | return 0; | |
338 | } | |
339 | switch (rule->action) { | |
340 | case AUDIT_NEVER: *state = AUDIT_DISABLED; break; | |
1da177e4 LT |
341 | case AUDIT_ALWAYS: *state = AUDIT_RECORD_CONTEXT; break; |
342 | } | |
343 | return 1; | |
344 | } | |
345 | ||
346 | /* At process creation time, we can determine if system-call auditing is | |
347 | * completely disabled for this task. Since we only have the task | |
348 | * structure at this point, we can only check uid and gid. | |
349 | */ | |
350 | static enum audit_state audit_filter_task(struct task_struct *tsk) | |
351 | { | |
352 | struct audit_entry *e; | |
353 | enum audit_state state; | |
354 | ||
355 | rcu_read_lock(); | |
0f45aa18 | 356 | list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) { |
1da177e4 LT |
357 | if (audit_filter_rules(tsk, &e->rule, NULL, &state)) { |
358 | rcu_read_unlock(); | |
359 | return state; | |
360 | } | |
361 | } | |
362 | rcu_read_unlock(); | |
363 | return AUDIT_BUILD_CONTEXT; | |
364 | } | |
365 | ||
366 | /* At syscall entry and exit time, this filter is called if the | |
367 | * audit_state is not low enough that auditing cannot take place, but is | |
23f32d18 | 368 | * also not high enough that we already know we have to write an audit |
b0dd25a8 | 369 | * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT). |
1da177e4 LT |
370 | */ |
371 | static enum audit_state audit_filter_syscall(struct task_struct *tsk, | |
372 | struct audit_context *ctx, | |
373 | struct list_head *list) | |
374 | { | |
375 | struct audit_entry *e; | |
c3896495 | 376 | enum audit_state state; |
1da177e4 | 377 | |
351bb722 | 378 | if (audit_pid && tsk->tgid == audit_pid) |
f7056d64 DW |
379 | return AUDIT_DISABLED; |
380 | ||
1da177e4 | 381 | rcu_read_lock(); |
c3896495 | 382 | if (!list_empty(list)) { |
b63862f4 DK |
383 | int word = AUDIT_WORD(ctx->major); |
384 | int bit = AUDIT_BIT(ctx->major); | |
385 | ||
386 | list_for_each_entry_rcu(e, list, list) { | |
387 | if ((e->rule.mask[word] & bit) == bit | |
388 | && audit_filter_rules(tsk, &e->rule, ctx, &state)) { | |
389 | rcu_read_unlock(); | |
390 | return state; | |
391 | } | |
0f45aa18 DW |
392 | } |
393 | } | |
394 | rcu_read_unlock(); | |
1da177e4 | 395 | return AUDIT_BUILD_CONTEXT; |
0f45aa18 DW |
396 | } |
397 | ||
1da177e4 LT |
398 | static inline struct audit_context *audit_get_context(struct task_struct *tsk, |
399 | int return_valid, | |
400 | int return_code) | |
401 | { | |
402 | struct audit_context *context = tsk->audit_context; | |
403 | ||
404 | if (likely(!context)) | |
405 | return NULL; | |
406 | context->return_valid = return_valid; | |
407 | context->return_code = return_code; | |
408 | ||
21af6c4f | 409 | if (context->in_syscall && !context->auditable) { |
1da177e4 | 410 | enum audit_state state; |
0f45aa18 | 411 | state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]); |
1da177e4 LT |
412 | if (state == AUDIT_RECORD_CONTEXT) |
413 | context->auditable = 1; | |
414 | } | |
415 | ||
416 | context->pid = tsk->pid; | |
f46038ff | 417 | context->ppid = sys_getppid(); /* sic. tsk == current in all cases */ |
1da177e4 LT |
418 | context->uid = tsk->uid; |
419 | context->gid = tsk->gid; | |
420 | context->euid = tsk->euid; | |
421 | context->suid = tsk->suid; | |
422 | context->fsuid = tsk->fsuid; | |
423 | context->egid = tsk->egid; | |
424 | context->sgid = tsk->sgid; | |
425 | context->fsgid = tsk->fsgid; | |
426 | context->personality = tsk->personality; | |
427 | tsk->audit_context = NULL; | |
428 | return context; | |
429 | } | |
430 | ||
431 | static inline void audit_free_names(struct audit_context *context) | |
432 | { | |
433 | int i; | |
434 | ||
435 | #if AUDIT_DEBUG == 2 | |
436 | if (context->auditable | |
437 | ||context->put_count + context->ino_count != context->name_count) { | |
73241ccc | 438 | printk(KERN_ERR "%s:%d(:%d): major=%d in_syscall=%d" |
1da177e4 LT |
439 | " name_count=%d put_count=%d" |
440 | " ino_count=%d [NOT freeing]\n", | |
73241ccc | 441 | __FILE__, __LINE__, |
1da177e4 LT |
442 | context->serial, context->major, context->in_syscall, |
443 | context->name_count, context->put_count, | |
444 | context->ino_count); | |
8c8570fb | 445 | for (i = 0; i < context->name_count; i++) { |
1da177e4 LT |
446 | printk(KERN_ERR "names[%d] = %p = %s\n", i, |
447 | context->names[i].name, | |
73241ccc | 448 | context->names[i].name ?: "(null)"); |
8c8570fb | 449 | } |
1da177e4 LT |
450 | dump_stack(); |
451 | return; | |
452 | } | |
453 | #endif | |
454 | #if AUDIT_DEBUG | |
455 | context->put_count = 0; | |
456 | context->ino_count = 0; | |
457 | #endif | |
458 | ||
8c8570fb | 459 | for (i = 0; i < context->name_count; i++) { |
1da177e4 LT |
460 | if (context->names[i].name) |
461 | __putname(context->names[i].name); | |
8c8570fb | 462 | } |
1da177e4 | 463 | context->name_count = 0; |
8f37d47c DW |
464 | if (context->pwd) |
465 | dput(context->pwd); | |
466 | if (context->pwdmnt) | |
467 | mntput(context->pwdmnt); | |
468 | context->pwd = NULL; | |
469 | context->pwdmnt = NULL; | |
1da177e4 LT |
470 | } |
471 | ||
472 | static inline void audit_free_aux(struct audit_context *context) | |
473 | { | |
474 | struct audit_aux_data *aux; | |
475 | ||
476 | while ((aux = context->aux)) { | |
01116105 SS |
477 | if (aux->type == AUDIT_AVC_PATH) { |
478 | struct audit_aux_data_path *axi = (void *)aux; | |
479 | dput(axi->dentry); | |
480 | mntput(axi->mnt); | |
481 | } | |
8c8570fb | 482 | |
1da177e4 LT |
483 | context->aux = aux->next; |
484 | kfree(aux); | |
485 | } | |
486 | } | |
487 | ||
488 | static inline void audit_zero_context(struct audit_context *context, | |
489 | enum audit_state state) | |
490 | { | |
491 | uid_t loginuid = context->loginuid; | |
492 | ||
493 | memset(context, 0, sizeof(*context)); | |
494 | context->state = state; | |
495 | context->loginuid = loginuid; | |
496 | } | |
497 | ||
498 | static inline struct audit_context *audit_alloc_context(enum audit_state state) | |
499 | { | |
500 | struct audit_context *context; | |
501 | ||
502 | if (!(context = kmalloc(sizeof(*context), GFP_KERNEL))) | |
503 | return NULL; | |
504 | audit_zero_context(context, state); | |
505 | return context; | |
506 | } | |
507 | ||
b0dd25a8 RD |
508 | /** |
509 | * audit_alloc - allocate an audit context block for a task | |
510 | * @tsk: task | |
511 | * | |
512 | * Filter on the task information and allocate a per-task audit context | |
1da177e4 LT |
513 | * if necessary. Doing so turns on system call auditing for the |
514 | * specified task. This is called from copy_process, so no lock is | |
b0dd25a8 RD |
515 | * needed. |
516 | */ | |
1da177e4 LT |
517 | int audit_alloc(struct task_struct *tsk) |
518 | { | |
519 | struct audit_context *context; | |
520 | enum audit_state state; | |
521 | ||
522 | if (likely(!audit_enabled)) | |
523 | return 0; /* Return if not auditing. */ | |
524 | ||
525 | state = audit_filter_task(tsk); | |
526 | if (likely(state == AUDIT_DISABLED)) | |
527 | return 0; | |
528 | ||
529 | if (!(context = audit_alloc_context(state))) { | |
530 | audit_log_lost("out of memory in audit_alloc"); | |
531 | return -ENOMEM; | |
532 | } | |
533 | ||
534 | /* Preserve login uid */ | |
535 | context->loginuid = -1; | |
536 | if (current->audit_context) | |
537 | context->loginuid = current->audit_context->loginuid; | |
538 | ||
539 | tsk->audit_context = context; | |
540 | set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static inline void audit_free_context(struct audit_context *context) | |
545 | { | |
546 | struct audit_context *previous; | |
547 | int count = 0; | |
548 | ||
549 | do { | |
550 | previous = context->previous; | |
551 | if (previous || (count && count < 10)) { | |
552 | ++count; | |
553 | printk(KERN_ERR "audit(:%d): major=%d name_count=%d:" | |
554 | " freeing multiple contexts (%d)\n", | |
555 | context->serial, context->major, | |
556 | context->name_count, count); | |
557 | } | |
558 | audit_free_names(context); | |
559 | audit_free_aux(context); | |
560 | kfree(context); | |
561 | context = previous; | |
562 | } while (context); | |
563 | if (count >= 10) | |
564 | printk(KERN_ERR "audit: freed %d contexts\n", count); | |
565 | } | |
566 | ||
e495149b | 567 | static void audit_log_task_context(struct audit_buffer *ab) |
8c8570fb DK |
568 | { |
569 | char *ctx = NULL; | |
570 | ssize_t len = 0; | |
571 | ||
572 | len = security_getprocattr(current, "current", NULL, 0); | |
573 | if (len < 0) { | |
574 | if (len != -EINVAL) | |
575 | goto error_path; | |
576 | return; | |
577 | } | |
578 | ||
e495149b | 579 | ctx = kmalloc(len, GFP_KERNEL); |
7306a0b9 | 580 | if (!ctx) |
8c8570fb | 581 | goto error_path; |
8c8570fb DK |
582 | |
583 | len = security_getprocattr(current, "current", ctx, len); | |
584 | if (len < 0 ) | |
585 | goto error_path; | |
586 | ||
587 | audit_log_format(ab, " subj=%s", ctx); | |
7306a0b9 | 588 | return; |
8c8570fb DK |
589 | |
590 | error_path: | |
591 | if (ctx) | |
592 | kfree(ctx); | |
7306a0b9 | 593 | audit_panic("error in audit_log_task_context"); |
8c8570fb DK |
594 | return; |
595 | } | |
596 | ||
e495149b | 597 | static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) |
219f0817 | 598 | { |
45d9bb0e AV |
599 | char name[sizeof(tsk->comm)]; |
600 | struct mm_struct *mm = tsk->mm; | |
219f0817 SS |
601 | struct vm_area_struct *vma; |
602 | ||
e495149b AV |
603 | /* tsk == current */ |
604 | ||
45d9bb0e | 605 | get_task_comm(name, tsk); |
99e45eea DW |
606 | audit_log_format(ab, " comm="); |
607 | audit_log_untrustedstring(ab, name); | |
219f0817 | 608 | |
e495149b AV |
609 | if (mm) { |
610 | down_read(&mm->mmap_sem); | |
611 | vma = mm->mmap; | |
612 | while (vma) { | |
613 | if ((vma->vm_flags & VM_EXECUTABLE) && | |
614 | vma->vm_file) { | |
615 | audit_log_d_path(ab, "exe=", | |
616 | vma->vm_file->f_dentry, | |
617 | vma->vm_file->f_vfsmnt); | |
618 | break; | |
619 | } | |
620 | vma = vma->vm_next; | |
219f0817 | 621 | } |
e495149b | 622 | up_read(&mm->mmap_sem); |
219f0817 | 623 | } |
e495149b | 624 | audit_log_task_context(ab); |
219f0817 SS |
625 | } |
626 | ||
e495149b | 627 | static void audit_log_exit(struct audit_context *context, struct task_struct *tsk) |
1da177e4 | 628 | { |
9c7aa6aa | 629 | int i, call_panic = 0; |
1da177e4 | 630 | struct audit_buffer *ab; |
7551ced3 | 631 | struct audit_aux_data *aux; |
a6c043a8 | 632 | const char *tty; |
1da177e4 | 633 | |
e495149b AV |
634 | /* tsk == current */ |
635 | ||
636 | ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL); | |
1da177e4 LT |
637 | if (!ab) |
638 | return; /* audit_panic has been called */ | |
bccf6ae0 DW |
639 | audit_log_format(ab, "arch=%x syscall=%d", |
640 | context->arch, context->major); | |
1da177e4 LT |
641 | if (context->personality != PER_LINUX) |
642 | audit_log_format(ab, " per=%lx", context->personality); | |
643 | if (context->return_valid) | |
2fd6f58b | 644 | audit_log_format(ab, " success=%s exit=%ld", |
645 | (context->return_valid==AUDITSC_SUCCESS)?"yes":"no", | |
646 | context->return_code); | |
45d9bb0e AV |
647 | if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name) |
648 | tty = tsk->signal->tty->name; | |
a6c043a8 SG |
649 | else |
650 | tty = "(none)"; | |
1da177e4 LT |
651 | audit_log_format(ab, |
652 | " a0=%lx a1=%lx a2=%lx a3=%lx items=%d" | |
f46038ff | 653 | " ppid=%d pid=%d auid=%u uid=%u gid=%u" |
326e9c8b | 654 | " euid=%u suid=%u fsuid=%u" |
a6c043a8 | 655 | " egid=%u sgid=%u fsgid=%u tty=%s", |
1da177e4 LT |
656 | context->argv[0], |
657 | context->argv[1], | |
658 | context->argv[2], | |
659 | context->argv[3], | |
660 | context->name_count, | |
f46038ff | 661 | context->ppid, |
1da177e4 LT |
662 | context->pid, |
663 | context->loginuid, | |
664 | context->uid, | |
665 | context->gid, | |
666 | context->euid, context->suid, context->fsuid, | |
a6c043a8 | 667 | context->egid, context->sgid, context->fsgid, tty); |
e495149b | 668 | audit_log_task_info(ab, tsk); |
1da177e4 | 669 | audit_log_end(ab); |
1da177e4 | 670 | |
7551ced3 | 671 | for (aux = context->aux; aux; aux = aux->next) { |
c0404993 | 672 | |
e495149b | 673 | ab = audit_log_start(context, GFP_KERNEL, aux->type); |
1da177e4 LT |
674 | if (!ab) |
675 | continue; /* audit_panic has been called */ | |
676 | ||
1da177e4 | 677 | switch (aux->type) { |
20ca73bc GW |
678 | case AUDIT_MQ_OPEN: { |
679 | struct audit_aux_data_mq_open *axi = (void *)aux; | |
680 | audit_log_format(ab, | |
681 | "oflag=0x%x mode=%#o mq_flags=0x%lx mq_maxmsg=%ld " | |
682 | "mq_msgsize=%ld mq_curmsgs=%ld", | |
683 | axi->oflag, axi->mode, axi->attr.mq_flags, | |
684 | axi->attr.mq_maxmsg, axi->attr.mq_msgsize, | |
685 | axi->attr.mq_curmsgs); | |
686 | break; } | |
687 | ||
688 | case AUDIT_MQ_SENDRECV: { | |
689 | struct audit_aux_data_mq_sendrecv *axi = (void *)aux; | |
690 | audit_log_format(ab, | |
691 | "mqdes=%d msg_len=%zd msg_prio=%u " | |
692 | "abs_timeout_sec=%ld abs_timeout_nsec=%ld", | |
693 | axi->mqdes, axi->msg_len, axi->msg_prio, | |
694 | axi->abs_timeout.tv_sec, axi->abs_timeout.tv_nsec); | |
695 | break; } | |
696 | ||
697 | case AUDIT_MQ_NOTIFY: { | |
698 | struct audit_aux_data_mq_notify *axi = (void *)aux; | |
699 | audit_log_format(ab, | |
700 | "mqdes=%d sigev_signo=%d", | |
701 | axi->mqdes, | |
702 | axi->notification.sigev_signo); | |
703 | break; } | |
704 | ||
705 | case AUDIT_MQ_GETSETATTR: { | |
706 | struct audit_aux_data_mq_getsetattr *axi = (void *)aux; | |
707 | audit_log_format(ab, | |
708 | "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld " | |
709 | "mq_curmsgs=%ld ", | |
710 | axi->mqdes, | |
711 | axi->mqstat.mq_flags, axi->mqstat.mq_maxmsg, | |
712 | axi->mqstat.mq_msgsize, axi->mqstat.mq_curmsgs); | |
713 | break; } | |
714 | ||
c0404993 | 715 | case AUDIT_IPC: { |
1da177e4 LT |
716 | struct audit_aux_data_ipcctl *axi = (void *)aux; |
717 | audit_log_format(ab, | |
ac03221a LK |
718 | "ouid=%u ogid=%u mode=%x", |
719 | axi->uid, axi->gid, axi->mode); | |
9c7aa6aa SG |
720 | if (axi->osid != 0) { |
721 | char *ctx = NULL; | |
722 | u32 len; | |
723 | if (selinux_ctxid_to_string( | |
724 | axi->osid, &ctx, &len)) { | |
ce29b682 | 725 | audit_log_format(ab, " osid=%u", |
9c7aa6aa SG |
726 | axi->osid); |
727 | call_panic = 1; | |
728 | } else | |
729 | audit_log_format(ab, " obj=%s", ctx); | |
730 | kfree(ctx); | |
731 | } | |
3ec3b2fb DW |
732 | break; } |
733 | ||
073115d6 SG |
734 | case AUDIT_IPC_SET_PERM: { |
735 | struct audit_aux_data_ipcctl *axi = (void *)aux; | |
736 | audit_log_format(ab, | |
ac03221a | 737 | "qbytes=%lx ouid=%u ogid=%u mode=%x", |
073115d6 | 738 | axi->qbytes, axi->uid, axi->gid, axi->mode); |
073115d6 | 739 | break; } |
ac03221a | 740 | |
473ae30b AV |
741 | case AUDIT_EXECVE: { |
742 | struct audit_aux_data_execve *axi = (void *)aux; | |
743 | int i; | |
744 | const char *p; | |
745 | for (i = 0, p = axi->mem; i < axi->argc; i++) { | |
746 | audit_log_format(ab, "a%d=", i); | |
747 | p = audit_log_untrustedstring(ab, p); | |
748 | audit_log_format(ab, "\n"); | |
749 | } | |
750 | break; } | |
073115d6 | 751 | |
3ec3b2fb DW |
752 | case AUDIT_SOCKETCALL: { |
753 | int i; | |
754 | struct audit_aux_data_socketcall *axs = (void *)aux; | |
755 | audit_log_format(ab, "nargs=%d", axs->nargs); | |
756 | for (i=0; i<axs->nargs; i++) | |
757 | audit_log_format(ab, " a%d=%lx", i, axs->args[i]); | |
758 | break; } | |
759 | ||
760 | case AUDIT_SOCKADDR: { | |
761 | struct audit_aux_data_sockaddr *axs = (void *)aux; | |
762 | ||
763 | audit_log_format(ab, "saddr="); | |
764 | audit_log_hex(ab, axs->a, axs->len); | |
765 | break; } | |
01116105 SS |
766 | |
767 | case AUDIT_AVC_PATH: { | |
768 | struct audit_aux_data_path *axi = (void *)aux; | |
769 | audit_log_d_path(ab, "path=", axi->dentry, axi->mnt); | |
01116105 SS |
770 | break; } |
771 | ||
1da177e4 LT |
772 | } |
773 | audit_log_end(ab); | |
1da177e4 LT |
774 | } |
775 | ||
8f37d47c | 776 | if (context->pwd && context->pwdmnt) { |
e495149b | 777 | ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD); |
8f37d47c DW |
778 | if (ab) { |
779 | audit_log_d_path(ab, "cwd=", context->pwd, context->pwdmnt); | |
780 | audit_log_end(ab); | |
781 | } | |
782 | } | |
1da177e4 | 783 | for (i = 0; i < context->name_count; i++) { |
73241ccc AG |
784 | unsigned long ino = context->names[i].ino; |
785 | unsigned long pino = context->names[i].pino; | |
786 | ||
e495149b | 787 | ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH); |
1da177e4 LT |
788 | if (!ab) |
789 | continue; /* audit_panic has been called */ | |
8f37d47c | 790 | |
1da177e4 | 791 | audit_log_format(ab, "item=%d", i); |
73241ccc AG |
792 | |
793 | audit_log_format(ab, " name="); | |
794 | if (context->names[i].name) | |
83c7d091 | 795 | audit_log_untrustedstring(ab, context->names[i].name); |
73241ccc AG |
796 | else |
797 | audit_log_format(ab, "(null)"); | |
798 | ||
799 | if (pino != (unsigned long)-1) | |
800 | audit_log_format(ab, " parent=%lu", pino); | |
801 | if (ino != (unsigned long)-1) | |
802 | audit_log_format(ab, " inode=%lu", ino); | |
803 | if ((pino != (unsigned long)-1) || (ino != (unsigned long)-1)) | |
804 | audit_log_format(ab, " dev=%02x:%02x mode=%#o" | |
805 | " ouid=%u ogid=%u rdev=%02x:%02x", | |
806 | MAJOR(context->names[i].dev), | |
807 | MINOR(context->names[i].dev), | |
808 | context->names[i].mode, | |
809 | context->names[i].uid, | |
810 | context->names[i].gid, | |
811 | MAJOR(context->names[i].rdev), | |
1da177e4 | 812 | MINOR(context->names[i].rdev)); |
1b50eed9 SG |
813 | if (context->names[i].osid != 0) { |
814 | char *ctx = NULL; | |
815 | u32 len; | |
816 | if (selinux_ctxid_to_string( | |
817 | context->names[i].osid, &ctx, &len)) { | |
ce29b682 | 818 | audit_log_format(ab, " osid=%u", |
1b50eed9 | 819 | context->names[i].osid); |
9c7aa6aa | 820 | call_panic = 2; |
1b50eed9 SG |
821 | } else |
822 | audit_log_format(ab, " obj=%s", ctx); | |
823 | kfree(ctx); | |
8c8570fb DK |
824 | } |
825 | ||
1da177e4 LT |
826 | audit_log_end(ab); |
827 | } | |
9c7aa6aa SG |
828 | if (call_panic) |
829 | audit_panic("error converting sid to string"); | |
1da177e4 LT |
830 | } |
831 | ||
b0dd25a8 RD |
832 | /** |
833 | * audit_free - free a per-task audit context | |
834 | * @tsk: task whose audit context block to free | |
835 | * | |
fa84cb93 | 836 | * Called from copy_process and do_exit |
b0dd25a8 | 837 | */ |
1da177e4 LT |
838 | void audit_free(struct task_struct *tsk) |
839 | { | |
840 | struct audit_context *context; | |
841 | ||
1da177e4 | 842 | context = audit_get_context(tsk, 0, 0); |
1da177e4 LT |
843 | if (likely(!context)) |
844 | return; | |
845 | ||
846 | /* Check for system calls that do not go through the exit | |
f5561964 DW |
847 | * function (e.g., exit_group), then free context block. |
848 | * We use GFP_ATOMIC here because we might be doing this | |
849 | * in the context of the idle thread */ | |
e495149b | 850 | /* that can happen only if we are called from do_exit() */ |
f7056d64 | 851 | if (context->in_syscall && context->auditable) |
e495149b | 852 | audit_log_exit(context, tsk); |
1da177e4 LT |
853 | |
854 | audit_free_context(context); | |
855 | } | |
856 | ||
b0dd25a8 RD |
857 | /** |
858 | * audit_syscall_entry - fill in an audit record at syscall entry | |
859 | * @tsk: task being audited | |
860 | * @arch: architecture type | |
861 | * @major: major syscall type (function) | |
862 | * @a1: additional syscall register 1 | |
863 | * @a2: additional syscall register 2 | |
864 | * @a3: additional syscall register 3 | |
865 | * @a4: additional syscall register 4 | |
866 | * | |
867 | * Fill in audit context at syscall entry. This only happens if the | |
1da177e4 LT |
868 | * audit context was created when the task was created and the state or |
869 | * filters demand the audit context be built. If the state from the | |
870 | * per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT, | |
871 | * then the record will be written at syscall exit time (otherwise, it | |
872 | * will only be written if another part of the kernel requests that it | |
b0dd25a8 RD |
873 | * be written). |
874 | */ | |
5411be59 | 875 | void audit_syscall_entry(int arch, int major, |
1da177e4 LT |
876 | unsigned long a1, unsigned long a2, |
877 | unsigned long a3, unsigned long a4) | |
878 | { | |
5411be59 | 879 | struct task_struct *tsk = current; |
1da177e4 LT |
880 | struct audit_context *context = tsk->audit_context; |
881 | enum audit_state state; | |
882 | ||
883 | BUG_ON(!context); | |
884 | ||
b0dd25a8 RD |
885 | /* |
886 | * This happens only on certain architectures that make system | |
1da177e4 LT |
887 | * calls in kernel_thread via the entry.S interface, instead of |
888 | * with direct calls. (If you are porting to a new | |
889 | * architecture, hitting this condition can indicate that you | |
890 | * got the _exit/_leave calls backward in entry.S.) | |
891 | * | |
892 | * i386 no | |
893 | * x86_64 no | |
2ef9481e | 894 | * ppc64 yes (see arch/powerpc/platforms/iseries/misc.S) |
1da177e4 LT |
895 | * |
896 | * This also happens with vm86 emulation in a non-nested manner | |
897 | * (entries without exits), so this case must be caught. | |
898 | */ | |
899 | if (context->in_syscall) { | |
900 | struct audit_context *newctx; | |
901 | ||
1da177e4 LT |
902 | #if AUDIT_DEBUG |
903 | printk(KERN_ERR | |
904 | "audit(:%d) pid=%d in syscall=%d;" | |
905 | " entering syscall=%d\n", | |
906 | context->serial, tsk->pid, context->major, major); | |
907 | #endif | |
908 | newctx = audit_alloc_context(context->state); | |
909 | if (newctx) { | |
910 | newctx->previous = context; | |
911 | context = newctx; | |
912 | tsk->audit_context = newctx; | |
913 | } else { | |
914 | /* If we can't alloc a new context, the best we | |
915 | * can do is to leak memory (any pending putname | |
916 | * will be lost). The only other alternative is | |
917 | * to abandon auditing. */ | |
918 | audit_zero_context(context, context->state); | |
919 | } | |
920 | } | |
921 | BUG_ON(context->in_syscall || context->name_count); | |
922 | ||
923 | if (!audit_enabled) | |
924 | return; | |
925 | ||
2fd6f58b | 926 | context->arch = arch; |
1da177e4 LT |
927 | context->major = major; |
928 | context->argv[0] = a1; | |
929 | context->argv[1] = a2; | |
930 | context->argv[2] = a3; | |
931 | context->argv[3] = a4; | |
932 | ||
933 | state = context->state; | |
934 | if (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT) | |
0f45aa18 | 935 | state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]); |
1da177e4 LT |
936 | if (likely(state == AUDIT_DISABLED)) |
937 | return; | |
938 | ||
ce625a80 | 939 | context->serial = 0; |
1da177e4 LT |
940 | context->ctime = CURRENT_TIME; |
941 | context->in_syscall = 1; | |
942 | context->auditable = !!(state == AUDIT_RECORD_CONTEXT); | |
943 | } | |
944 | ||
b0dd25a8 RD |
945 | /** |
946 | * audit_syscall_exit - deallocate audit context after a system call | |
947 | * @tsk: task being audited | |
948 | * @valid: success/failure flag | |
949 | * @return_code: syscall return value | |
950 | * | |
951 | * Tear down after system call. If the audit context has been marked as | |
1da177e4 LT |
952 | * auditable (either because of the AUDIT_RECORD_CONTEXT state from |
953 | * filtering, or because some other part of the kernel write an audit | |
954 | * message), then write out the syscall information. In call cases, | |
b0dd25a8 RD |
955 | * free the names stored from getname(). |
956 | */ | |
5411be59 | 957 | void audit_syscall_exit(int valid, long return_code) |
1da177e4 | 958 | { |
5411be59 | 959 | struct task_struct *tsk = current; |
1da177e4 LT |
960 | struct audit_context *context; |
961 | ||
2fd6f58b | 962 | context = audit_get_context(tsk, valid, return_code); |
1da177e4 | 963 | |
1da177e4 | 964 | if (likely(!context)) |
97e94c45 | 965 | return; |
1da177e4 | 966 | |
f7056d64 | 967 | if (context->in_syscall && context->auditable) |
e495149b | 968 | audit_log_exit(context, tsk); |
1da177e4 LT |
969 | |
970 | context->in_syscall = 0; | |
971 | context->auditable = 0; | |
2fd6f58b | 972 | |
1da177e4 LT |
973 | if (context->previous) { |
974 | struct audit_context *new_context = context->previous; | |
975 | context->previous = NULL; | |
976 | audit_free_context(context); | |
977 | tsk->audit_context = new_context; | |
978 | } else { | |
979 | audit_free_names(context); | |
980 | audit_free_aux(context); | |
1da177e4 LT |
981 | tsk->audit_context = context; |
982 | } | |
1da177e4 LT |
983 | } |
984 | ||
b0dd25a8 RD |
985 | /** |
986 | * audit_getname - add a name to the list | |
987 | * @name: name to add | |
988 | * | |
989 | * Add a name to the list of audit names for this context. | |
990 | * Called from fs/namei.c:getname(). | |
991 | */ | |
d8945bb5 | 992 | void __audit_getname(const char *name) |
1da177e4 LT |
993 | { |
994 | struct audit_context *context = current->audit_context; | |
995 | ||
d8945bb5 | 996 | if (IS_ERR(name) || !name) |
1da177e4 LT |
997 | return; |
998 | ||
999 | if (!context->in_syscall) { | |
1000 | #if AUDIT_DEBUG == 2 | |
1001 | printk(KERN_ERR "%s:%d(:%d): ignoring getname(%p)\n", | |
1002 | __FILE__, __LINE__, context->serial, name); | |
1003 | dump_stack(); | |
1004 | #endif | |
1005 | return; | |
1006 | } | |
1007 | BUG_ON(context->name_count >= AUDIT_NAMES); | |
1008 | context->names[context->name_count].name = name; | |
1009 | context->names[context->name_count].ino = (unsigned long)-1; | |
1010 | ++context->name_count; | |
8f37d47c DW |
1011 | if (!context->pwd) { |
1012 | read_lock(¤t->fs->lock); | |
1013 | context->pwd = dget(current->fs->pwd); | |
1014 | context->pwdmnt = mntget(current->fs->pwdmnt); | |
1015 | read_unlock(¤t->fs->lock); | |
1016 | } | |
1017 | ||
1da177e4 LT |
1018 | } |
1019 | ||
b0dd25a8 RD |
1020 | /* audit_putname - intercept a putname request |
1021 | * @name: name to intercept and delay for putname | |
1022 | * | |
1023 | * If we have stored the name from getname in the audit context, | |
1024 | * then we delay the putname until syscall exit. | |
1025 | * Called from include/linux/fs.h:putname(). | |
1026 | */ | |
1da177e4 LT |
1027 | void audit_putname(const char *name) |
1028 | { | |
1029 | struct audit_context *context = current->audit_context; | |
1030 | ||
1031 | BUG_ON(!context); | |
1032 | if (!context->in_syscall) { | |
1033 | #if AUDIT_DEBUG == 2 | |
1034 | printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n", | |
1035 | __FILE__, __LINE__, context->serial, name); | |
1036 | if (context->name_count) { | |
1037 | int i; | |
1038 | for (i = 0; i < context->name_count; i++) | |
1039 | printk(KERN_ERR "name[%d] = %p = %s\n", i, | |
1040 | context->names[i].name, | |
73241ccc | 1041 | context->names[i].name ?: "(null)"); |
1da177e4 LT |
1042 | } |
1043 | #endif | |
1044 | __putname(name); | |
1045 | } | |
1046 | #if AUDIT_DEBUG | |
1047 | else { | |
1048 | ++context->put_count; | |
1049 | if (context->put_count > context->name_count) { | |
1050 | printk(KERN_ERR "%s:%d(:%d): major=%d" | |
1051 | " in_syscall=%d putname(%p) name_count=%d" | |
1052 | " put_count=%d\n", | |
1053 | __FILE__, __LINE__, | |
1054 | context->serial, context->major, | |
1055 | context->in_syscall, name, context->name_count, | |
1056 | context->put_count); | |
1057 | dump_stack(); | |
1058 | } | |
1059 | } | |
1060 | #endif | |
1061 | } | |
1062 | ||
9c7aa6aa | 1063 | static void audit_inode_context(int idx, const struct inode *inode) |
8c8570fb DK |
1064 | { |
1065 | struct audit_context *context = current->audit_context; | |
8c8570fb | 1066 | |
1b50eed9 | 1067 | selinux_get_inode_sid(inode, &context->names[idx].osid); |
8c8570fb DK |
1068 | } |
1069 | ||
1070 | ||
b0dd25a8 RD |
1071 | /** |
1072 | * audit_inode - store the inode and device from a lookup | |
1073 | * @name: name being audited | |
1074 | * @inode: inode being audited | |
1075 | * @flags: lookup flags (as used in path_lookup()) | |
1076 | * | |
1077 | * Called from fs/namei.c:path_lookup(). | |
1078 | */ | |
73241ccc | 1079 | void __audit_inode(const char *name, const struct inode *inode, unsigned flags) |
1da177e4 LT |
1080 | { |
1081 | int idx; | |
1082 | struct audit_context *context = current->audit_context; | |
1083 | ||
1084 | if (!context->in_syscall) | |
1085 | return; | |
1086 | if (context->name_count | |
1087 | && context->names[context->name_count-1].name | |
1088 | && context->names[context->name_count-1].name == name) | |
1089 | idx = context->name_count - 1; | |
1090 | else if (context->name_count > 1 | |
1091 | && context->names[context->name_count-2].name | |
1092 | && context->names[context->name_count-2].name == name) | |
1093 | idx = context->name_count - 2; | |
1094 | else { | |
1095 | /* FIXME: how much do we care about inodes that have no | |
1096 | * associated name? */ | |
1097 | if (context->name_count >= AUDIT_NAMES - AUDIT_NAMES_RESERVED) | |
1098 | return; | |
1099 | idx = context->name_count++; | |
1100 | context->names[idx].name = NULL; | |
1101 | #if AUDIT_DEBUG | |
1102 | ++context->ino_count; | |
1103 | #endif | |
1104 | } | |
ae7b961b DW |
1105 | context->names[idx].dev = inode->i_sb->s_dev; |
1106 | context->names[idx].mode = inode->i_mode; | |
1107 | context->names[idx].uid = inode->i_uid; | |
1108 | context->names[idx].gid = inode->i_gid; | |
1109 | context->names[idx].rdev = inode->i_rdev; | |
8c8570fb | 1110 | audit_inode_context(idx, inode); |
73241ccc AG |
1111 | if ((flags & LOOKUP_PARENT) && (strcmp(name, "/") != 0) && |
1112 | (strcmp(name, ".") != 0)) { | |
1113 | context->names[idx].ino = (unsigned long)-1; | |
1114 | context->names[idx].pino = inode->i_ino; | |
1115 | } else { | |
1116 | context->names[idx].ino = inode->i_ino; | |
1117 | context->names[idx].pino = (unsigned long)-1; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * audit_inode_child - collect inode info for created/removed objects | |
1123 | * @dname: inode's dentry name | |
1124 | * @inode: inode being audited | |
1125 | * @pino: inode number of dentry parent | |
1126 | * | |
1127 | * For syscalls that create or remove filesystem objects, audit_inode | |
1128 | * can only collect information for the filesystem object's parent. | |
1129 | * This call updates the audit context with the child's information. | |
1130 | * Syscalls that create a new filesystem object must be hooked after | |
1131 | * the object is created. Syscalls that remove a filesystem object | |
1132 | * must be hooked prior, in order to capture the target inode during | |
1133 | * unsuccessful attempts. | |
1134 | */ | |
1135 | void __audit_inode_child(const char *dname, const struct inode *inode, | |
1136 | unsigned long pino) | |
1137 | { | |
1138 | int idx; | |
1139 | struct audit_context *context = current->audit_context; | |
1140 | ||
1141 | if (!context->in_syscall) | |
1142 | return; | |
1143 | ||
1144 | /* determine matching parent */ | |
1145 | if (dname) | |
1146 | for (idx = 0; idx < context->name_count; idx++) | |
1147 | if (context->names[idx].pino == pino) { | |
1148 | const char *n; | |
1149 | const char *name = context->names[idx].name; | |
1150 | int dlen = strlen(dname); | |
1151 | int nlen = name ? strlen(name) : 0; | |
1152 | ||
1153 | if (nlen < dlen) | |
1154 | continue; | |
1155 | ||
1156 | /* disregard trailing slashes */ | |
1157 | n = name + nlen - 1; | |
1158 | while ((*n == '/') && (n > name)) | |
1159 | n--; | |
1160 | ||
1161 | /* find last path component */ | |
1162 | n = n - dlen + 1; | |
1163 | if (n < name) | |
1164 | continue; | |
1165 | else if (n > name) { | |
1166 | if (*--n != '/') | |
1167 | continue; | |
1168 | else | |
1169 | n++; | |
1170 | } | |
1171 | ||
1172 | if (strncmp(n, dname, dlen) == 0) | |
1173 | goto update_context; | |
1174 | } | |
1175 | ||
1176 | /* catch-all in case match not found */ | |
1177 | idx = context->name_count++; | |
1178 | context->names[idx].name = NULL; | |
1179 | context->names[idx].pino = pino; | |
1180 | #if AUDIT_DEBUG | |
1181 | context->ino_count++; | |
1182 | #endif | |
1183 | ||
1184 | update_context: | |
1185 | if (inode) { | |
1186 | context->names[idx].ino = inode->i_ino; | |
1187 | context->names[idx].dev = inode->i_sb->s_dev; | |
1188 | context->names[idx].mode = inode->i_mode; | |
1189 | context->names[idx].uid = inode->i_uid; | |
1190 | context->names[idx].gid = inode->i_gid; | |
1191 | context->names[idx].rdev = inode->i_rdev; | |
8c8570fb | 1192 | audit_inode_context(idx, inode); |
73241ccc | 1193 | } |
1da177e4 LT |
1194 | } |
1195 | ||
b0dd25a8 RD |
1196 | /** |
1197 | * auditsc_get_stamp - get local copies of audit_context values | |
1198 | * @ctx: audit_context for the task | |
1199 | * @t: timespec to store time recorded in the audit_context | |
1200 | * @serial: serial value that is recorded in the audit_context | |
1201 | * | |
1202 | * Also sets the context as auditable. | |
1203 | */ | |
bfb4496e DW |
1204 | void auditsc_get_stamp(struct audit_context *ctx, |
1205 | struct timespec *t, unsigned int *serial) | |
1da177e4 | 1206 | { |
ce625a80 DW |
1207 | if (!ctx->serial) |
1208 | ctx->serial = audit_serial(); | |
bfb4496e DW |
1209 | t->tv_sec = ctx->ctime.tv_sec; |
1210 | t->tv_nsec = ctx->ctime.tv_nsec; | |
1211 | *serial = ctx->serial; | |
1212 | ctx->auditable = 1; | |
1da177e4 LT |
1213 | } |
1214 | ||
b0dd25a8 RD |
1215 | /** |
1216 | * audit_set_loginuid - set a task's audit_context loginuid | |
1217 | * @task: task whose audit context is being modified | |
1218 | * @loginuid: loginuid value | |
1219 | * | |
1220 | * Returns 0. | |
1221 | * | |
1222 | * Called (set) from fs/proc/base.c::proc_loginuid_write(). | |
1223 | */ | |
456be6cd | 1224 | int audit_set_loginuid(struct task_struct *task, uid_t loginuid) |
1da177e4 | 1225 | { |
456be6cd | 1226 | if (task->audit_context) { |
c0404993 SG |
1227 | struct audit_buffer *ab; |
1228 | ||
9ad9ad38 | 1229 | ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN); |
c0404993 SG |
1230 | if (ab) { |
1231 | audit_log_format(ab, "login pid=%d uid=%u " | |
326e9c8b | 1232 | "old auid=%u new auid=%u", |
c0404993 SG |
1233 | task->pid, task->uid, |
1234 | task->audit_context->loginuid, loginuid); | |
1235 | audit_log_end(ab); | |
1236 | } | |
456be6cd | 1237 | task->audit_context->loginuid = loginuid; |
1da177e4 LT |
1238 | } |
1239 | return 0; | |
1240 | } | |
1241 | ||
b0dd25a8 RD |
1242 | /** |
1243 | * audit_get_loginuid - get the loginuid for an audit_context | |
1244 | * @ctx: the audit_context | |
1245 | * | |
1246 | * Returns the context's loginuid or -1 if @ctx is NULL. | |
1247 | */ | |
1da177e4 LT |
1248 | uid_t audit_get_loginuid(struct audit_context *ctx) |
1249 | { | |
1250 | return ctx ? ctx->loginuid : -1; | |
1251 | } | |
1252 | ||
20ca73bc GW |
1253 | /** |
1254 | * __audit_mq_open - record audit data for a POSIX MQ open | |
1255 | * @oflag: open flag | |
1256 | * @mode: mode bits | |
1257 | * @u_attr: queue attributes | |
1258 | * | |
1259 | * Returns 0 for success or NULL context or < 0 on error. | |
1260 | */ | |
1261 | int __audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr) | |
1262 | { | |
1263 | struct audit_aux_data_mq_open *ax; | |
1264 | struct audit_context *context = current->audit_context; | |
1265 | ||
1266 | if (!audit_enabled) | |
1267 | return 0; | |
1268 | ||
1269 | if (likely(!context)) | |
1270 | return 0; | |
1271 | ||
1272 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); | |
1273 | if (!ax) | |
1274 | return -ENOMEM; | |
1275 | ||
1276 | if (u_attr != NULL) { | |
1277 | if (copy_from_user(&ax->attr, u_attr, sizeof(ax->attr))) { | |
1278 | kfree(ax); | |
1279 | return -EFAULT; | |
1280 | } | |
1281 | } else | |
1282 | memset(&ax->attr, 0, sizeof(ax->attr)); | |
1283 | ||
1284 | ax->oflag = oflag; | |
1285 | ax->mode = mode; | |
1286 | ||
1287 | ax->d.type = AUDIT_MQ_OPEN; | |
1288 | ax->d.next = context->aux; | |
1289 | context->aux = (void *)ax; | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | /** | |
1294 | * __audit_mq_timedsend - record audit data for a POSIX MQ timed send | |
1295 | * @mqdes: MQ descriptor | |
1296 | * @msg_len: Message length | |
1297 | * @msg_prio: Message priority | |
1298 | * @abs_timeout: Message timeout in absolute time | |
1299 | * | |
1300 | * Returns 0 for success or NULL context or < 0 on error. | |
1301 | */ | |
1302 | int __audit_mq_timedsend(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, | |
1303 | const struct timespec __user *u_abs_timeout) | |
1304 | { | |
1305 | struct audit_aux_data_mq_sendrecv *ax; | |
1306 | struct audit_context *context = current->audit_context; | |
1307 | ||
1308 | if (!audit_enabled) | |
1309 | return 0; | |
1310 | ||
1311 | if (likely(!context)) | |
1312 | return 0; | |
1313 | ||
1314 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); | |
1315 | if (!ax) | |
1316 | return -ENOMEM; | |
1317 | ||
1318 | if (u_abs_timeout != NULL) { | |
1319 | if (copy_from_user(&ax->abs_timeout, u_abs_timeout, sizeof(ax->abs_timeout))) { | |
1320 | kfree(ax); | |
1321 | return -EFAULT; | |
1322 | } | |
1323 | } else | |
1324 | memset(&ax->abs_timeout, 0, sizeof(ax->abs_timeout)); | |
1325 | ||
1326 | ax->mqdes = mqdes; | |
1327 | ax->msg_len = msg_len; | |
1328 | ax->msg_prio = msg_prio; | |
1329 | ||
1330 | ax->d.type = AUDIT_MQ_SENDRECV; | |
1331 | ax->d.next = context->aux; | |
1332 | context->aux = (void *)ax; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | /** | |
1337 | * __audit_mq_timedreceive - record audit data for a POSIX MQ timed receive | |
1338 | * @mqdes: MQ descriptor | |
1339 | * @msg_len: Message length | |
1340 | * @msg_prio: Message priority | |
1341 | * @abs_timeout: Message timeout in absolute time | |
1342 | * | |
1343 | * Returns 0 for success or NULL context or < 0 on error. | |
1344 | */ | |
1345 | int __audit_mq_timedreceive(mqd_t mqdes, size_t msg_len, | |
1346 | unsigned int __user *u_msg_prio, | |
1347 | const struct timespec __user *u_abs_timeout) | |
1348 | { | |
1349 | struct audit_aux_data_mq_sendrecv *ax; | |
1350 | struct audit_context *context = current->audit_context; | |
1351 | ||
1352 | if (!audit_enabled) | |
1353 | return 0; | |
1354 | ||
1355 | if (likely(!context)) | |
1356 | return 0; | |
1357 | ||
1358 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); | |
1359 | if (!ax) | |
1360 | return -ENOMEM; | |
1361 | ||
1362 | if (u_msg_prio != NULL) { | |
1363 | if (get_user(ax->msg_prio, u_msg_prio)) { | |
1364 | kfree(ax); | |
1365 | return -EFAULT; | |
1366 | } | |
1367 | } else | |
1368 | ax->msg_prio = 0; | |
1369 | ||
1370 | if (u_abs_timeout != NULL) { | |
1371 | if (copy_from_user(&ax->abs_timeout, u_abs_timeout, sizeof(ax->abs_timeout))) { | |
1372 | kfree(ax); | |
1373 | return -EFAULT; | |
1374 | } | |
1375 | } else | |
1376 | memset(&ax->abs_timeout, 0, sizeof(ax->abs_timeout)); | |
1377 | ||
1378 | ax->mqdes = mqdes; | |
1379 | ax->msg_len = msg_len; | |
1380 | ||
1381 | ax->d.type = AUDIT_MQ_SENDRECV; | |
1382 | ax->d.next = context->aux; | |
1383 | context->aux = (void *)ax; | |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | /** | |
1388 | * __audit_mq_notify - record audit data for a POSIX MQ notify | |
1389 | * @mqdes: MQ descriptor | |
1390 | * @u_notification: Notification event | |
1391 | * | |
1392 | * Returns 0 for success or NULL context or < 0 on error. | |
1393 | */ | |
1394 | ||
1395 | int __audit_mq_notify(mqd_t mqdes, const struct sigevent __user *u_notification) | |
1396 | { | |
1397 | struct audit_aux_data_mq_notify *ax; | |
1398 | struct audit_context *context = current->audit_context; | |
1399 | ||
1400 | if (!audit_enabled) | |
1401 | return 0; | |
1402 | ||
1403 | if (likely(!context)) | |
1404 | return 0; | |
1405 | ||
1406 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); | |
1407 | if (!ax) | |
1408 | return -ENOMEM; | |
1409 | ||
1410 | if (u_notification != NULL) { | |
1411 | if (copy_from_user(&ax->notification, u_notification, sizeof(ax->notification))) { | |
1412 | kfree(ax); | |
1413 | return -EFAULT; | |
1414 | } | |
1415 | } else | |
1416 | memset(&ax->notification, 0, sizeof(ax->notification)); | |
1417 | ||
1418 | ax->mqdes = mqdes; | |
1419 | ||
1420 | ax->d.type = AUDIT_MQ_NOTIFY; | |
1421 | ax->d.next = context->aux; | |
1422 | context->aux = (void *)ax; | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | /** | |
1427 | * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute | |
1428 | * @mqdes: MQ descriptor | |
1429 | * @mqstat: MQ flags | |
1430 | * | |
1431 | * Returns 0 for success or NULL context or < 0 on error. | |
1432 | */ | |
1433 | int __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat) | |
1434 | { | |
1435 | struct audit_aux_data_mq_getsetattr *ax; | |
1436 | struct audit_context *context = current->audit_context; | |
1437 | ||
1438 | if (!audit_enabled) | |
1439 | return 0; | |
1440 | ||
1441 | if (likely(!context)) | |
1442 | return 0; | |
1443 | ||
1444 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); | |
1445 | if (!ax) | |
1446 | return -ENOMEM; | |
1447 | ||
1448 | ax->mqdes = mqdes; | |
1449 | ax->mqstat = *mqstat; | |
1450 | ||
1451 | ax->d.type = AUDIT_MQ_GETSETATTR; | |
1452 | ax->d.next = context->aux; | |
1453 | context->aux = (void *)ax; | |
1454 | return 0; | |
1455 | } | |
1456 | ||
b0dd25a8 | 1457 | /** |
073115d6 SG |
1458 | * audit_ipc_obj - record audit data for ipc object |
1459 | * @ipcp: ipc permissions | |
1460 | * | |
1461 | * Returns 0 for success or NULL context or < 0 on error. | |
1462 | */ | |
d8945bb5 | 1463 | int __audit_ipc_obj(struct kern_ipc_perm *ipcp) |
073115d6 SG |
1464 | { |
1465 | struct audit_aux_data_ipcctl *ax; | |
1466 | struct audit_context *context = current->audit_context; | |
1467 | ||
073115d6 SG |
1468 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); |
1469 | if (!ax) | |
1470 | return -ENOMEM; | |
1471 | ||
1472 | ax->uid = ipcp->uid; | |
1473 | ax->gid = ipcp->gid; | |
1474 | ax->mode = ipcp->mode; | |
1475 | selinux_get_ipc_sid(ipcp, &ax->osid); | |
1476 | ||
1477 | ax->d.type = AUDIT_IPC; | |
1478 | ax->d.next = context->aux; | |
1479 | context->aux = (void *)ax; | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | /** | |
1484 | * audit_ipc_set_perm - record audit data for new ipc permissions | |
b0dd25a8 RD |
1485 | * @qbytes: msgq bytes |
1486 | * @uid: msgq user id | |
1487 | * @gid: msgq group id | |
1488 | * @mode: msgq mode (permissions) | |
1489 | * | |
1490 | * Returns 0 for success or NULL context or < 0 on error. | |
1491 | */ | |
d8945bb5 | 1492 | int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode) |
1da177e4 LT |
1493 | { |
1494 | struct audit_aux_data_ipcctl *ax; | |
1495 | struct audit_context *context = current->audit_context; | |
1496 | ||
8c8570fb | 1497 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); |
1da177e4 LT |
1498 | if (!ax) |
1499 | return -ENOMEM; | |
1500 | ||
1501 | ax->qbytes = qbytes; | |
1502 | ax->uid = uid; | |
1503 | ax->gid = gid; | |
1504 | ax->mode = mode; | |
1505 | ||
073115d6 | 1506 | ax->d.type = AUDIT_IPC_SET_PERM; |
1da177e4 LT |
1507 | ax->d.next = context->aux; |
1508 | context->aux = (void *)ax; | |
1509 | return 0; | |
1510 | } | |
c2f0c7c3 | 1511 | |
473ae30b AV |
1512 | int audit_bprm(struct linux_binprm *bprm) |
1513 | { | |
1514 | struct audit_aux_data_execve *ax; | |
1515 | struct audit_context *context = current->audit_context; | |
1516 | unsigned long p, next; | |
1517 | void *to; | |
1518 | ||
1519 | if (likely(!audit_enabled || !context)) | |
1520 | return 0; | |
1521 | ||
1522 | ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p, | |
1523 | GFP_KERNEL); | |
1524 | if (!ax) | |
1525 | return -ENOMEM; | |
1526 | ||
1527 | ax->argc = bprm->argc; | |
1528 | ax->envc = bprm->envc; | |
1529 | for (p = bprm->p, to = ax->mem; p < MAX_ARG_PAGES*PAGE_SIZE; p = next) { | |
1530 | struct page *page = bprm->page[p / PAGE_SIZE]; | |
1531 | void *kaddr = kmap(page); | |
1532 | next = (p + PAGE_SIZE) & ~(PAGE_SIZE - 1); | |
1533 | memcpy(to, kaddr + (p & (PAGE_SIZE - 1)), next - p); | |
1534 | to += next - p; | |
1535 | kunmap(page); | |
1536 | } | |
1537 | ||
1538 | ax->d.type = AUDIT_EXECVE; | |
1539 | ax->d.next = context->aux; | |
1540 | context->aux = (void *)ax; | |
1541 | return 0; | |
1542 | } | |
1543 | ||
1544 | ||
b0dd25a8 RD |
1545 | /** |
1546 | * audit_socketcall - record audit data for sys_socketcall | |
1547 | * @nargs: number of args | |
1548 | * @args: args array | |
1549 | * | |
1550 | * Returns 0 for success or NULL context or < 0 on error. | |
1551 | */ | |
3ec3b2fb DW |
1552 | int audit_socketcall(int nargs, unsigned long *args) |
1553 | { | |
1554 | struct audit_aux_data_socketcall *ax; | |
1555 | struct audit_context *context = current->audit_context; | |
1556 | ||
1557 | if (likely(!context)) | |
1558 | return 0; | |
1559 | ||
1560 | ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL); | |
1561 | if (!ax) | |
1562 | return -ENOMEM; | |
1563 | ||
1564 | ax->nargs = nargs; | |
1565 | memcpy(ax->args, args, nargs * sizeof(unsigned long)); | |
1566 | ||
1567 | ax->d.type = AUDIT_SOCKETCALL; | |
1568 | ax->d.next = context->aux; | |
1569 | context->aux = (void *)ax; | |
1570 | return 0; | |
1571 | } | |
1572 | ||
b0dd25a8 RD |
1573 | /** |
1574 | * audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto | |
1575 | * @len: data length in user space | |
1576 | * @a: data address in kernel space | |
1577 | * | |
1578 | * Returns 0 for success or NULL context or < 0 on error. | |
1579 | */ | |
3ec3b2fb DW |
1580 | int audit_sockaddr(int len, void *a) |
1581 | { | |
1582 | struct audit_aux_data_sockaddr *ax; | |
1583 | struct audit_context *context = current->audit_context; | |
1584 | ||
1585 | if (likely(!context)) | |
1586 | return 0; | |
1587 | ||
1588 | ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL); | |
1589 | if (!ax) | |
1590 | return -ENOMEM; | |
1591 | ||
1592 | ax->len = len; | |
1593 | memcpy(ax->a, a, len); | |
1594 | ||
1595 | ax->d.type = AUDIT_SOCKADDR; | |
1596 | ax->d.next = context->aux; | |
1597 | context->aux = (void *)ax; | |
1598 | return 0; | |
1599 | } | |
1600 | ||
b0dd25a8 RD |
1601 | /** |
1602 | * audit_avc_path - record the granting or denial of permissions | |
1603 | * @dentry: dentry to record | |
1604 | * @mnt: mnt to record | |
1605 | * | |
1606 | * Returns 0 for success or NULL context or < 0 on error. | |
1607 | * | |
1608 | * Called from security/selinux/avc.c::avc_audit() | |
1609 | */ | |
01116105 SS |
1610 | int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt) |
1611 | { | |
1612 | struct audit_aux_data_path *ax; | |
1613 | struct audit_context *context = current->audit_context; | |
1614 | ||
1615 | if (likely(!context)) | |
1616 | return 0; | |
1617 | ||
1618 | ax = kmalloc(sizeof(*ax), GFP_ATOMIC); | |
1619 | if (!ax) | |
1620 | return -ENOMEM; | |
1621 | ||
1622 | ax->dentry = dget(dentry); | |
1623 | ax->mnt = mntget(mnt); | |
1624 | ||
1625 | ax->d.type = AUDIT_AVC_PATH; | |
1626 | ax->d.next = context->aux; | |
1627 | context->aux = (void *)ax; | |
1628 | return 0; | |
1629 | } | |
1630 | ||
b0dd25a8 RD |
1631 | /** |
1632 | * audit_signal_info - record signal info for shutting down audit subsystem | |
1633 | * @sig: signal value | |
1634 | * @t: task being signaled | |
1635 | * | |
1636 | * If the audit subsystem is being terminated, record the task (pid) | |
1637 | * and uid that is doing that. | |
1638 | */ | |
e1396065 | 1639 | void __audit_signal_info(int sig, struct task_struct *t) |
c2f0c7c3 SG |
1640 | { |
1641 | extern pid_t audit_sig_pid; | |
1642 | extern uid_t audit_sig_uid; | |
e1396065 AV |
1643 | extern u32 audit_sig_sid; |
1644 | ||
1645 | if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) { | |
1646 | struct task_struct *tsk = current; | |
1647 | struct audit_context *ctx = tsk->audit_context; | |
1648 | audit_sig_pid = tsk->pid; | |
1649 | if (ctx) | |
1650 | audit_sig_uid = ctx->loginuid; | |
1651 | else | |
1652 | audit_sig_uid = tsk->uid; | |
1653 | selinux_get_task_sid(tsk, &audit_sig_sid); | |
c2f0c7c3 SG |
1654 | } |
1655 | } |