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-rw-r--r--kernel/auditfilter.c137
1 files changed, 118 insertions, 19 deletions
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index a6c3f1abd206..c4bcdbaf4d4d 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -342,6 +342,8 @@ static struct audit_entry *audit_rule_to_entry(struct audit_rule *rule)
342 342
343 f->type = rule->fields[i] & ~(AUDIT_NEGATE|AUDIT_OPERATORS); 343 f->type = rule->fields[i] & ~(AUDIT_NEGATE|AUDIT_OPERATORS);
344 f->val = rule->values[i]; 344 f->val = rule->values[i];
345 f->uid = INVALID_UID;
346 f->gid = INVALID_GID;
345 347
346 err = -EINVAL; 348 err = -EINVAL;
347 if (f->op == Audit_bad) 349 if (f->op == Audit_bad)
@@ -350,16 +352,32 @@ static struct audit_entry *audit_rule_to_entry(struct audit_rule *rule)
350 switch(f->type) { 352 switch(f->type) {
351 default: 353 default:
352 goto exit_free; 354 goto exit_free;
353 case AUDIT_PID:
354 case AUDIT_UID: 355 case AUDIT_UID:
355 case AUDIT_EUID: 356 case AUDIT_EUID:
356 case AUDIT_SUID: 357 case AUDIT_SUID:
357 case AUDIT_FSUID: 358 case AUDIT_FSUID:
359 case AUDIT_LOGINUID:
360 /* bit ops not implemented for uid comparisons */
361 if (f->op == Audit_bitmask || f->op == Audit_bittest)
362 goto exit_free;
363
364 f->uid = make_kuid(current_user_ns(), f->val);
365 if (!uid_valid(f->uid))
366 goto exit_free;
367 break;
358 case AUDIT_GID: 368 case AUDIT_GID:
359 case AUDIT_EGID: 369 case AUDIT_EGID:
360 case AUDIT_SGID: 370 case AUDIT_SGID:
361 case AUDIT_FSGID: 371 case AUDIT_FSGID:
362 case AUDIT_LOGINUID: 372 /* bit ops not implemented for gid comparisons */
373 if (f->op == Audit_bitmask || f->op == Audit_bittest)
374 goto exit_free;
375
376 f->gid = make_kgid(current_user_ns(), f->val);
377 if (!gid_valid(f->gid))
378 goto exit_free;
379 break;
380 case AUDIT_PID:
363 case AUDIT_PERS: 381 case AUDIT_PERS:
364 case AUDIT_MSGTYPE: 382 case AUDIT_MSGTYPE:
365 case AUDIT_PPID: 383 case AUDIT_PPID:
@@ -437,19 +455,39 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
437 455
438 f->type = data->fields[i]; 456 f->type = data->fields[i];
439 f->val = data->values[i]; 457 f->val = data->values[i];
458 f->uid = INVALID_UID;
459 f->gid = INVALID_GID;
440 f->lsm_str = NULL; 460 f->lsm_str = NULL;
441 f->lsm_rule = NULL; 461 f->lsm_rule = NULL;
442 switch(f->type) { 462 switch(f->type) {
443 case AUDIT_PID:
444 case AUDIT_UID: 463 case AUDIT_UID:
445 case AUDIT_EUID: 464 case AUDIT_EUID:
446 case AUDIT_SUID: 465 case AUDIT_SUID:
447 case AUDIT_FSUID: 466 case AUDIT_FSUID:
467 case AUDIT_LOGINUID:
468 case AUDIT_OBJ_UID:
469 /* bit ops not implemented for uid comparisons */
470 if (f->op == Audit_bitmask || f->op == Audit_bittest)
471 goto exit_free;
472
473 f->uid = make_kuid(current_user_ns(), f->val);
474 if (!uid_valid(f->uid))
475 goto exit_free;
476 break;
448 case AUDIT_GID: 477 case AUDIT_GID:
449 case AUDIT_EGID: 478 case AUDIT_EGID:
450 case AUDIT_SGID: 479 case AUDIT_SGID:
451 case AUDIT_FSGID: 480 case AUDIT_FSGID:
452 case AUDIT_LOGINUID: 481 case AUDIT_OBJ_GID:
482 /* bit ops not implemented for gid comparisons */
483 if (f->op == Audit_bitmask || f->op == Audit_bittest)
484 goto exit_free;
485
486 f->gid = make_kgid(current_user_ns(), f->val);
487 if (!gid_valid(f->gid))
488 goto exit_free;
489 break;
490 case AUDIT_PID:
453 case AUDIT_PERS: 491 case AUDIT_PERS:
454 case AUDIT_MSGTYPE: 492 case AUDIT_MSGTYPE:
455 case AUDIT_PPID: 493 case AUDIT_PPID:
@@ -461,8 +499,6 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
461 case AUDIT_ARG1: 499 case AUDIT_ARG1:
462 case AUDIT_ARG2: 500 case AUDIT_ARG2:
463 case AUDIT_ARG3: 501 case AUDIT_ARG3:
464 case AUDIT_OBJ_UID:
465 case AUDIT_OBJ_GID:
466 break; 502 break;
467 case AUDIT_ARCH: 503 case AUDIT_ARCH:
468 entry->rule.arch_f = f; 504 entry->rule.arch_f = f;
@@ -707,6 +743,23 @@ static int audit_compare_rule(struct audit_krule *a, struct audit_krule *b)
707 if (strcmp(a->filterkey, b->filterkey)) 743 if (strcmp(a->filterkey, b->filterkey))
708 return 1; 744 return 1;
709 break; 745 break;
746 case AUDIT_UID:
747 case AUDIT_EUID:
748 case AUDIT_SUID:
749 case AUDIT_FSUID:
750 case AUDIT_LOGINUID:
751 case AUDIT_OBJ_UID:
752 if (!uid_eq(a->fields[i].uid, b->fields[i].uid))
753 return 1;
754 break;
755 case AUDIT_GID:
756 case AUDIT_EGID:
757 case AUDIT_SGID:
758 case AUDIT_FSGID:
759 case AUDIT_OBJ_GID:
760 if (!gid_eq(a->fields[i].gid, b->fields[i].gid))
761 return 1;
762 break;
710 default: 763 default:
711 if (a->fields[i].val != b->fields[i].val) 764 if (a->fields[i].val != b->fields[i].val)
712 return 1; 765 return 1;
@@ -1056,7 +1109,7 @@ static void audit_list_rules(int pid, int seq, struct sk_buff_head *q)
1056} 1109}
1057 1110
1058/* Log rule additions and removals */ 1111/* Log rule additions and removals */
1059static void audit_log_rule_change(uid_t loginuid, u32 sessionid, u32 sid, 1112static void audit_log_rule_change(kuid_t loginuid, u32 sessionid, u32 sid,
1060 char *action, struct audit_krule *rule, 1113 char *action, struct audit_krule *rule,
1061 int res) 1114 int res)
1062{ 1115{
@@ -1068,7 +1121,8 @@ static void audit_log_rule_change(uid_t loginuid, u32 sessionid, u32 sid,
1068 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); 1121 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
1069 if (!ab) 1122 if (!ab)
1070 return; 1123 return;
1071 audit_log_format(ab, "auid=%u ses=%u", loginuid, sessionid); 1124 audit_log_format(ab, "auid=%u ses=%u",
1125 from_kuid(&init_user_ns, loginuid), sessionid);
1072 if (sid) { 1126 if (sid) {
1073 char *ctx = NULL; 1127 char *ctx = NULL;
1074 u32 len; 1128 u32 len;
@@ -1098,8 +1152,8 @@ static void audit_log_rule_change(uid_t loginuid, u32 sessionid, u32 sid,
1098 * @sessionid: sessionid for netlink audit message 1152 * @sessionid: sessionid for netlink audit message
1099 * @sid: SE Linux Security ID of sender 1153 * @sid: SE Linux Security ID of sender
1100 */ 1154 */
1101int audit_receive_filter(int type, int pid, int uid, int seq, void *data, 1155int audit_receive_filter(int type, int pid, int seq, void *data,
1102 size_t datasz, uid_t loginuid, u32 sessionid, u32 sid) 1156 size_t datasz, kuid_t loginuid, u32 sessionid, u32 sid)
1103{ 1157{
1104 struct task_struct *tsk; 1158 struct task_struct *tsk;
1105 struct audit_netlink_list *dest; 1159 struct audit_netlink_list *dest;
@@ -1198,6 +1252,52 @@ int audit_comparator(u32 left, u32 op, u32 right)
1198 } 1252 }
1199} 1253}
1200 1254
1255int audit_uid_comparator(kuid_t left, u32 op, kuid_t right)
1256{
1257 switch (op) {
1258 case Audit_equal:
1259 return uid_eq(left, right);
1260 case Audit_not_equal:
1261 return !uid_eq(left, right);
1262 case Audit_lt:
1263 return uid_lt(left, right);
1264 case Audit_le:
1265 return uid_lte(left, right);
1266 case Audit_gt:
1267 return uid_gt(left, right);
1268 case Audit_ge:
1269 return uid_gte(left, right);
1270 case Audit_bitmask:
1271 case Audit_bittest:
1272 default:
1273 BUG();
1274 return 0;
1275 }
1276}
1277
1278int audit_gid_comparator(kgid_t left, u32 op, kgid_t right)
1279{
1280 switch (op) {
1281 case Audit_equal:
1282 return gid_eq(left, right);
1283 case Audit_not_equal:
1284 return !gid_eq(left, right);
1285 case Audit_lt:
1286 return gid_lt(left, right);
1287 case Audit_le:
1288 return gid_lte(left, right);
1289 case Audit_gt:
1290 return gid_gt(left, right);
1291 case Audit_ge:
1292 return gid_gte(left, right);
1293 case Audit_bitmask:
1294 case Audit_bittest:
1295 default:
1296 BUG();
1297 return 0;
1298 }
1299}
1300
1201/* Compare given dentry name with last component in given path, 1301/* Compare given dentry name with last component in given path,
1202 * return of 0 indicates a match. */ 1302 * return of 0 indicates a match. */
1203int audit_compare_dname_path(const char *dname, const char *path, 1303int audit_compare_dname_path(const char *dname, const char *path,
@@ -1236,8 +1336,7 @@ int audit_compare_dname_path(const char *dname, const char *path,
1236 return strncmp(p, dname, dlen); 1336 return strncmp(p, dname, dlen);
1237} 1337}
1238 1338
1239static int audit_filter_user_rules(struct netlink_skb_parms *cb, 1339static int audit_filter_user_rules(struct audit_krule *rule,
1240 struct audit_krule *rule,
1241 enum audit_state *state) 1340 enum audit_state *state)
1242{ 1341{
1243 int i; 1342 int i;
@@ -1249,17 +1348,17 @@ static int audit_filter_user_rules(struct netlink_skb_parms *cb,
1249 1348
1250 switch (f->type) { 1349 switch (f->type) {
1251 case AUDIT_PID: 1350 case AUDIT_PID:
1252 result = audit_comparator(cb->creds.pid, f->op, f->val); 1351 result = audit_comparator(task_pid_vnr(current), f->op, f->val);
1253 break; 1352 break;
1254 case AUDIT_UID: 1353 case AUDIT_UID:
1255 result = audit_comparator(cb->creds.uid, f->op, f->val); 1354 result = audit_uid_comparator(current_uid(), f->op, f->uid);
1256 break; 1355 break;
1257 case AUDIT_GID: 1356 case AUDIT_GID:
1258 result = audit_comparator(cb->creds.gid, f->op, f->val); 1357 result = audit_gid_comparator(current_gid(), f->op, f->gid);
1259 break; 1358 break;
1260 case AUDIT_LOGINUID: 1359 case AUDIT_LOGINUID:
1261 result = audit_comparator(audit_get_loginuid(current), 1360 result = audit_uid_comparator(audit_get_loginuid(current),
1262 f->op, f->val); 1361 f->op, f->uid);
1263 break; 1362 break;
1264 case AUDIT_SUBJ_USER: 1363 case AUDIT_SUBJ_USER:
1265 case AUDIT_SUBJ_ROLE: 1364 case AUDIT_SUBJ_ROLE:
@@ -1287,7 +1386,7 @@ static int audit_filter_user_rules(struct netlink_skb_parms *cb,
1287 return 1; 1386 return 1;
1288} 1387}
1289 1388
1290int audit_filter_user(struct netlink_skb_parms *cb) 1389int audit_filter_user(void)
1291{ 1390{
1292 enum audit_state state = AUDIT_DISABLED; 1391 enum audit_state state = AUDIT_DISABLED;
1293 struct audit_entry *e; 1392 struct audit_entry *e;
@@ -1295,7 +1394,7 @@ int audit_filter_user(struct netlink_skb_parms *cb)
1295 1394
1296 rcu_read_lock(); 1395 rcu_read_lock();
1297 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_USER], list) { 1396 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_USER], list) {
1298 if (audit_filter_user_rules(cb, &e->rule, &state)) { 1397 if (audit_filter_user_rules(&e->rule, &state)) {
1299 if (state == AUDIT_DISABLED) 1398 if (state == AUDIT_DISABLED)
1300 ret = 0; 1399 ret = 0;
1301 break; 1400 break;
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-02 15:37:57 -0400