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authorLinus Torvalds <torvalds@linux-foundation.org>2008-02-01 16:37:03 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2008-02-01 16:37:03 -0500
commitdd5f5fed6c9458a7aa81eeef3732cc3a9891cfdf (patch)
tree06b81942dc218763889efe65faf08aeb23e71f03
parent3e01dfce1387f8bec41018f0d7b42fd88ad4163f (diff)
parent7759db82774802885f96c250b36c3dfe317e62ff (diff)
Merge branch 'audit.b46' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current
* 'audit.b46' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current: [AUDIT] Add uid, gid fields to ANOM_PROMISCUOUS message [AUDIT] ratelimit printk messages audit [patch 2/2] audit: complement va_copy with va_end() [patch 1/2] kernel/audit.c: warning fix [AUDIT] create context if auditing was ever enabled [AUDIT] clean up audit_receive_msg() [AUDIT] make audit=0 really stop audit messages [AUDIT] break large execve argument logging into smaller messages [AUDIT] include audit type in audit message when using printk [AUDIT] do not panic on exclude messages in audit_log_pid_context() [AUDIT] Add End of Event record [AUDIT] add session id to audit messages [AUDIT] collect uid, loginuid, and comm in OBJ_PID records [AUDIT] return EINTR not ERESTART* [PATCH] get rid of loginuid races [PATCH] switch audit_get_loginuid() to task_struct *
Diffstat
-rw-r--r--Documentation/filesystems/proc.txt7
-rw-r--r--drivers/char/tty_audit.c19
-rw-r--r--fs/proc/base.c2
-rw-r--r--include/linux/audit.h13
-rw-r--r--include/linux/init_task.h8
-rw-r--r--include/linux/sched.h4
-rw-r--r--kernel/audit.c434
-rw-r--r--kernel/auditfilter.c54
-rw-r--r--kernel/auditsc.c349
-rw-r--r--kernel/sysctl.c11
-rw-r--r--net/core/dev.c15
-rw-r--r--net/key/af_key.c14
-rw-r--r--net/netlink/af_netlink.c2
-rw-r--r--net/xfrm/xfrm_state.c2
-rw-r--r--security/selinux/selinuxfs.c17
-rw-r--r--security/selinux/ss/services.c5
16 files changed, 533 insertions, 423 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 11fe51c036bf..194c8f351320 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1134,13 +1134,6 @@ check the amount of free space (value is in seconds). Default settings are: 4,
1134resume it if we have a value of 3 or more percent; consider information about 1134resume it if we have a value of 3 or more percent; consider information about
1135the amount of free space valid for 30 seconds 1135the amount of free space valid for 30 seconds
1136 1136
1137audit_argv_kb
1138-------------
1139
1140The file contains a single value denoting the limit on the argv array size
1141for execve (in KiB). This limit is only applied when system call auditing for
1142execve is enabled, otherwise the value is ignored.
1143
1144ctrl-alt-del 1137ctrl-alt-del
1145------------ 1138------------
1146 1139
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index d222012c1b0c..bacded0eefab 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -73,6 +73,7 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
73 * @tsk with @loginuid. @buf->mutex must be locked. 73 * @tsk with @loginuid. @buf->mutex must be locked.
74 */ 74 */
75static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid, 75static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
76 unsigned int sessionid,
76 struct tty_audit_buf *buf) 77 struct tty_audit_buf *buf)
77{ 78{
78 struct audit_buffer *ab; 79 struct audit_buffer *ab;
@@ -85,9 +86,9 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
85 if (ab) { 86 if (ab) {
86 char name[sizeof(tsk->comm)]; 87 char name[sizeof(tsk->comm)];
87 88
88 audit_log_format(ab, "tty pid=%u uid=%u auid=%u major=%d " 89 audit_log_format(ab, "tty pid=%u uid=%u auid=%u ses=%u "
89 "minor=%d comm=", tsk->pid, tsk->uid, 90 "major=%d minor=%d comm=", tsk->pid, tsk->uid,
90 loginuid, buf->major, buf->minor); 91 loginuid, sessionid, buf->major, buf->minor);
91 get_task_comm(name, tsk); 92 get_task_comm(name, tsk);
92 audit_log_untrustedstring(ab, name); 93 audit_log_untrustedstring(ab, name);
93 audit_log_format(ab, " data="); 94 audit_log_format(ab, " data=");
@@ -105,8 +106,9 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
105 */ 106 */
106static void tty_audit_buf_push_current(struct tty_audit_buf *buf) 107static void tty_audit_buf_push_current(struct tty_audit_buf *buf)
107{ 108{
108 tty_audit_buf_push(current, audit_get_loginuid(current->audit_context), 109 uid_t auid = audit_get_loginuid(current);
109 buf); 110 unsigned int sessionid = audit_get_sessionid(current);
111 tty_audit_buf_push(current, auid, sessionid, buf);
110} 112}
111 113
112/** 114/**
@@ -152,6 +154,11 @@ void tty_audit_fork(struct signal_struct *sig)
152void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid) 154void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
153{ 155{
154 struct tty_audit_buf *buf; 156 struct tty_audit_buf *buf;
157 /* FIXME I think this is correct. Check against netlink once that is
158 * I really need to read this code more closely. But that's for
159 * another patch.
160 */
161 unsigned int sessionid = audit_get_sessionid(tsk);
155 162
156 spin_lock_irq(&tsk->sighand->siglock); 163 spin_lock_irq(&tsk->sighand->siglock);
157 buf = tsk->signal->tty_audit_buf; 164 buf = tsk->signal->tty_audit_buf;
@@ -162,7 +169,7 @@ void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid)
162 return; 169 return;
163 170
164 mutex_lock(&buf->mutex); 171 mutex_lock(&buf->mutex);
165 tty_audit_buf_push(tsk, loginuid, buf); 172 tty_audit_buf_push(tsk, loginuid, sessionid, buf);
166 mutex_unlock(&buf->mutex); 173 mutex_unlock(&buf->mutex);
167 174
168 tty_audit_buf_put(buf); 175 tty_audit_buf_put(buf);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9fa9708cc715..33537487f5ab 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -984,7 +984,7 @@ static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
984 if (!task) 984 if (!task)
985 return -ESRCH; 985 return -ESRCH;
986 length = scnprintf(tmpbuf, TMPBUFLEN, "%u", 986 length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
987 audit_get_loginuid(task->audit_context)); 987 audit_get_loginuid(task));
988 put_task_struct(task); 988 put_task_struct(task);
989 return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 989 return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
990} 990}
diff --git a/include/linux/audit.h b/include/linux/audit.h
index bdd6f5de5fc4..97153027207a 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -98,6 +98,7 @@
98#define AUDIT_FD_PAIR 1317 /* audit record for pipe/socketpair */ 98#define AUDIT_FD_PAIR 1317 /* audit record for pipe/socketpair */
99#define AUDIT_OBJ_PID 1318 /* ptrace target */ 99#define AUDIT_OBJ_PID 1318 /* ptrace target */
100#define AUDIT_TTY 1319 /* Input on an administrative TTY */ 100#define AUDIT_TTY 1319 /* Input on an administrative TTY */
101#define AUDIT_EOE 1320 /* End of multi-record event */
101 102
102#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */ 103#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
103#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */ 104#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
@@ -409,7 +410,8 @@ extern unsigned int audit_serial(void);
409extern void auditsc_get_stamp(struct audit_context *ctx, 410extern void auditsc_get_stamp(struct audit_context *ctx,
410 struct timespec *t, unsigned int *serial); 411 struct timespec *t, unsigned int *serial);
411extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid); 412extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
412extern uid_t audit_get_loginuid(struct audit_context *ctx); 413#define audit_get_loginuid(t) ((t)->loginuid)
414#define audit_get_sessionid(t) ((t)->sessionid)
413extern void audit_log_task_context(struct audit_buffer *ab); 415extern void audit_log_task_context(struct audit_buffer *ab);
414extern int __audit_ipc_obj(struct kern_ipc_perm *ipcp); 416extern int __audit_ipc_obj(struct kern_ipc_perm *ipcp);
415extern int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode); 417extern int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
@@ -488,7 +490,8 @@ extern int audit_signals;
488#define audit_inode_child(d,i,p) do { ; } while (0) 490#define audit_inode_child(d,i,p) do { ; } while (0)
489#define audit_core_dumps(i) do { ; } while (0) 491#define audit_core_dumps(i) do { ; } while (0)
490#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0) 492#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
491#define audit_get_loginuid(c) ({ -1; }) 493#define audit_get_loginuid(t) (-1)
494#define audit_get_sessionid(t) (-1)
492#define audit_log_task_context(b) do { ; } while (0) 495#define audit_log_task_context(b) do { ; } while (0)
493#define audit_ipc_obj(i) ({ 0; }) 496#define audit_ipc_obj(i) ({ 0; })
494#define audit_ipc_set_perm(q,u,g,m) ({ 0; }) 497#define audit_ipc_set_perm(q,u,g,m) ({ 0; })
@@ -522,9 +525,11 @@ extern void audit_log_end(struct audit_buffer *ab);
522extern void audit_log_hex(struct audit_buffer *ab, 525extern void audit_log_hex(struct audit_buffer *ab,
523 const unsigned char *buf, 526 const unsigned char *buf,
524 size_t len); 527 size_t len);
525extern const char * audit_log_untrustedstring(struct audit_buffer *ab, 528extern int audit_string_contains_control(const char *string,
529 size_t len);
530extern void audit_log_untrustedstring(struct audit_buffer *ab,
526 const char *string); 531 const char *string);
527extern const char * audit_log_n_untrustedstring(struct audit_buffer *ab, 532extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
528 size_t n, 533 size_t n,
529 const char *string); 534 const char *string);
530extern void audit_log_d_path(struct audit_buffer *ab, 535extern void audit_log_d_path(struct audit_buffer *ab,
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index e6b3f7080679..f42663eaf655 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -114,6 +114,13 @@ extern struct group_info init_groups;
114 .pid = &init_struct_pid, \ 114 .pid = &init_struct_pid, \
115} 115}
116 116
117#ifdef CONFIG_AUDITSYSCALL
118#define INIT_IDS \
119 .loginuid = -1, \
120 .sessionid = -1,
121#else
122#define INIT_IDS
123#endif
117/* 124/*
118 * INIT_TASK is used to set up the first task table, touch at 125 * INIT_TASK is used to set up the first task table, touch at
119 * your own risk!. Base=0, limit=0x1fffff (=2MB) 126 * your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -173,6 +180,7 @@ extern struct group_info init_groups;
173 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 180 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
174 }, \ 181 }, \
175 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \ 182 .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
183 INIT_IDS \
176 INIT_TRACE_IRQFLAGS \ 184 INIT_TRACE_IRQFLAGS \
177 INIT_LOCKDEP \ 185 INIT_LOCKDEP \
178} 186}
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6c333579d9da..af6947e69b40 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1139,6 +1139,10 @@ struct task_struct {
1139 void *security; 1139 void *security;
1140#endif 1140#endif
1141 struct audit_context *audit_context; 1141 struct audit_context *audit_context;
1142#ifdef CONFIG_AUDITSYSCALL
1143 uid_t loginuid;
1144 unsigned int sessionid;
1145#endif
1142 seccomp_t seccomp; 1146 seccomp_t seccomp;
1143 1147
1144/* Thread group tracking */ 1148/* Thread group tracking */
diff --git a/kernel/audit.c b/kernel/audit.c
index 801c946dd24b..c8555b180213 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -66,10 +66,11 @@
66 * (Initialization happens after skb_init is called.) */ 66 * (Initialization happens after skb_init is called.) */
67static int audit_initialized; 67static int audit_initialized;
68 68
69/* 0 - no auditing 69#define AUDIT_OFF 0
70 * 1 - auditing enabled 70#define AUDIT_ON 1
71 * 2 - auditing enabled and configuration is locked/unchangeable. */ 71#define AUDIT_LOCKED 2
72int audit_enabled; 72int audit_enabled;
73int audit_ever_enabled;
73 74
74/* Default state when kernel boots without any parameters. */ 75/* Default state when kernel boots without any parameters. */
75static int audit_default; 76static int audit_default;
@@ -152,8 +153,10 @@ struct audit_buffer {
152 153
153static void audit_set_pid(struct audit_buffer *ab, pid_t pid) 154static void audit_set_pid(struct audit_buffer *ab, pid_t pid)
154{ 155{
155 struct nlmsghdr *nlh = nlmsg_hdr(ab->skb); 156 if (ab) {
156 nlh->nlmsg_pid = pid; 157 struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
158 nlh->nlmsg_pid = pid;
159 }
157} 160}
158 161
159void audit_panic(const char *message) 162void audit_panic(const char *message)
@@ -163,7 +166,8 @@ void audit_panic(const char *message)
163 case AUDIT_FAIL_SILENT: 166 case AUDIT_FAIL_SILENT:
164 break; 167 break;
165 case AUDIT_FAIL_PRINTK: 168 case AUDIT_FAIL_PRINTK:
166 printk(KERN_ERR "audit: %s\n", message); 169 if (printk_ratelimit())
170 printk(KERN_ERR "audit: %s\n", message);
167 break; 171 break;
168 case AUDIT_FAIL_PANIC: 172 case AUDIT_FAIL_PANIC:
169 panic("audit: %s\n", message); 173 panic("audit: %s\n", message);
@@ -231,161 +235,107 @@ void audit_log_lost(const char *message)
231 } 235 }
232 236
233 if (print) { 237 if (print) {
234 printk(KERN_WARNING 238 if (printk_ratelimit())
235 "audit: audit_lost=%d audit_rate_limit=%d audit_backlog_limit=%d\n", 239 printk(KERN_WARNING
236 atomic_read(&audit_lost), 240 "audit: audit_lost=%d audit_rate_limit=%d "
237 audit_rate_limit, 241 "audit_backlog_limit=%d\n",
238 audit_backlog_limit); 242 atomic_read(&audit_lost),
243 audit_rate_limit,
244 audit_backlog_limit);
239 audit_panic(message); 245 audit_panic(message);
240 } 246 }
241} 247}
242 248
243static int audit_set_rate_limit(int limit, uid_t loginuid, u32 sid) 249static int audit_log_config_change(char *function_name, int new, int old,
250 uid_t loginuid, u32 sid, int allow_changes)
244{ 251{
245 int res, rc = 0, old = audit_rate_limit; 252 struct audit_buffer *ab;
246 253 int rc = 0;
247 /* check if we are locked */
248 if (audit_enabled == 2)
249 res = 0;
250 else
251 res = 1;
252 254
255 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
256 audit_log_format(ab, "%s=%d old=%d by auid=%u", function_name, new,
257 old, loginuid);
253 if (sid) { 258 if (sid) {
254 char *ctx = NULL; 259 char *ctx = NULL;
255 u32 len; 260 u32 len;
256 if ((rc = selinux_sid_to_string(sid, &ctx, &len)) == 0) { 261
257 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE, 262 rc = selinux_sid_to_string(sid, &ctx, &len);
258 "audit_rate_limit=%d old=%d by auid=%u" 263 if (rc) {
259 " subj=%s res=%d", 264 audit_log_format(ab, " sid=%u", sid);
260 limit, old, loginuid, ctx, res); 265 allow_changes = 0; /* Something weird, deny request */
266 } else {
267 audit_log_format(ab, " subj=%s", ctx);
261 kfree(ctx); 268 kfree(ctx);
262 } else 269 }
263 res = 0; /* Something weird, deny request */
264 } 270 }
265 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE, 271 audit_log_format(ab, " res=%d", allow_changes);
266 "audit_rate_limit=%d old=%d by auid=%u res=%d", 272 audit_log_end(ab);
267 limit, old, loginuid, res);
268
269 /* If we are allowed, make the change */
270 if (res == 1)
271 audit_rate_limit = limit;
272 /* Not allowed, update reason */
273 else if (rc == 0)
274 rc = -EPERM;
275 return rc; 273 return rc;
276} 274}
277 275
278static int audit_set_backlog_limit(int limit, uid_t loginuid, u32 sid) 276static int audit_do_config_change(char *function_name, int *to_change,
277 int new, uid_t loginuid, u32 sid)
279{ 278{
280 int res, rc = 0, old = audit_backlog_limit; 279 int allow_changes, rc = 0, old = *to_change;
281 280
282 /* check if we are locked */ 281 /* check if we are locked */
283 if (audit_enabled == 2) 282 if (audit_enabled == AUDIT_LOCKED)
284 res = 0; 283 allow_changes = 0;
285 else 284 else
286 res = 1; 285 allow_changes = 1;
287 286
288 if (sid) { 287 if (audit_enabled != AUDIT_OFF) {
289 char *ctx = NULL; 288 rc = audit_log_config_change(function_name, new, old,
290 u32 len; 289 loginuid, sid, allow_changes);
291 if ((rc = selinux_sid_to_string(sid, &ctx, &len)) == 0) { 290 if (rc)
292 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE, 291 allow_changes = 0;
293 "audit_backlog_limit=%d old=%d by auid=%u"
294 " subj=%s res=%d",
295 limit, old, loginuid, ctx, res);
296 kfree(ctx);
297 } else
298 res = 0; /* Something weird, deny request */
299 } 292 }
300 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE,
301 "audit_backlog_limit=%d old=%d by auid=%u res=%d",
302 limit, old, loginuid, res);
303 293
304 /* If we are allowed, make the change */ 294 /* If we are allowed, make the change */
305 if (res == 1) 295 if (allow_changes == 1)
306 audit_backlog_limit = limit; 296 *to_change = new;
307 /* Not allowed, update reason */ 297 /* Not allowed, update reason */
308 else if (rc == 0) 298 else if (rc == 0)
309 rc = -EPERM; 299 rc = -EPERM;
310 return rc; 300 return rc;
311} 301}
312 302
313static int audit_set_enabled(int state, uid_t loginuid, u32 sid) 303static int audit_set_rate_limit(int limit, uid_t loginuid, u32 sid)
304{
305 return audit_do_config_change("audit_rate_limit", &audit_rate_limit,
306 limit, loginuid, sid);
307}
308
309static int audit_set_backlog_limit(int limit, uid_t loginuid, u32 sid)
314{ 310{
315 int res, rc = 0, old = audit_enabled; 311 return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit,
312 limit, loginuid, sid);
313}
316 314
317 if (state < 0 || state > 2) 315static int audit_set_enabled(int state, uid_t loginuid, u32 sid)
316{
317 int rc;
318 if (state < AUDIT_OFF || state > AUDIT_LOCKED)
318 return -EINVAL; 319 return -EINVAL;
319 320
320 /* check if we are locked */ 321 rc = audit_do_config_change("audit_enabled", &audit_enabled, state,
321 if (audit_enabled == 2) 322 loginuid, sid);
322 res = 0;
323 else
324 res = 1;
325 323
326 if (sid) { 324 if (!rc)
327 char *ctx = NULL; 325 audit_ever_enabled |= !!state;
328 u32 len;
329 if ((rc = selinux_sid_to_string(sid, &ctx, &len)) == 0) {
330 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE,
331 "audit_enabled=%d old=%d by auid=%u"
332 " subj=%s res=%d",
333 state, old, loginuid, ctx, res);
334 kfree(ctx);
335 } else
336 res = 0; /* Something weird, deny request */
337 }
338 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE,
339 "audit_enabled=%d old=%d by auid=%u res=%d",
340 state, old, loginuid, res);
341 326
342 /* If we are allowed, make the change */
343 if (res == 1)
344 audit_enabled = state;
345 /* Not allowed, update reason */
346 else if (rc == 0)
347 rc = -EPERM;
348 return rc; 327 return rc;
349} 328}
350 329
351static int audit_set_failure(int state, uid_t loginuid, u32 sid) 330static int audit_set_failure(int state, uid_t loginuid, u32 sid)
352{ 331{
353 int res, rc = 0, old = audit_failure;
354
355 if (state != AUDIT_FAIL_SILENT 332 if (state != AUDIT_FAIL_SILENT
356 && state != AUDIT_FAIL_PRINTK 333 && state != AUDIT_FAIL_PRINTK
357 && state != AUDIT_FAIL_PANIC) 334 && state != AUDIT_FAIL_PANIC)
358 return -EINVAL; 335 return -EINVAL;
359 336
360 /* check if we are locked */ 337 return audit_do_config_change("audit_failure", &audit_failure, state,
361 if (audit_enabled == 2) 338 loginuid, sid);
362 res = 0;
363 else
364 res = 1;
365
366 if (sid) {
367 char *ctx = NULL;
368 u32 len;
369 if ((rc = selinux_sid_to_string(sid, &ctx, &len)) == 0) {
370 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE,
371 "audit_failure=%d old=%d by auid=%u"
372 " subj=%s res=%d",
373 state, old, loginuid, ctx, res);
374 kfree(ctx);
375 } else
376 res = 0; /* Something weird, deny request */
377 }
378 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE,
379 "audit_failure=%d old=%d by auid=%u res=%d",
380 state, old, loginuid, res);
381
382 /* If we are allowed, make the change */
383 if (res == 1)
384 audit_failure = state;
385 /* Not allowed, update reason */
386 else if (rc == 0)
387 rc = -EPERM;
388 return rc;
389} 339}
390 340
391static int kauditd_thread(void *dummy) 341static int kauditd_thread(void *dummy)
@@ -405,7 +355,11 @@ static int kauditd_thread(void *dummy)
405 audit_pid = 0; 355 audit_pid = 0;
406 } 356 }
407 } else { 357 } else {
408 printk(KERN_NOTICE "%s\n", skb->data + NLMSG_SPACE(0)); 358 if (printk_ratelimit())
359 printk(KERN_NOTICE "%s\n", skb->data +
360 NLMSG_SPACE(0));
361 else
362 audit_log_lost("printk limit exceeded\n");
409 kfree_skb(skb); 363 kfree_skb(skb);
410 } 364 }
411 } else { 365 } else {
@@ -573,6 +527,33 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
573 return err; 527 return err;
574} 528}
575 529
530static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
531 u32 pid, u32 uid, uid_t auid, u32 sid)
532{
533 int rc = 0;
534 char *ctx = NULL;
535 u32 len;
536
537 if (!audit_enabled) {
538 *ab = NULL;
539 return rc;
540 }
541
542 *ab = audit_log_start(NULL, GFP_KERNEL, msg_type);
543 audit_log_format(*ab, "user pid=%d uid=%u auid=%u",
544 pid, uid, auid);
545 if (sid) {
546 rc = selinux_sid_to_string(sid, &ctx, &len);
547 if (rc)
548 audit_log_format(*ab, " ssid=%u", sid);
549 else
550 audit_log_format(*ab, " subj=%s", ctx);
551 kfree(ctx);
552 }
553
554 return rc;
555}
556
576static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 557static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
577{ 558{
578 u32 uid, pid, seq, sid; 559 u32 uid, pid, seq, sid;
@@ -583,7 +564,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
583 u16 msg_type = nlh->nlmsg_type; 564 u16 msg_type = nlh->nlmsg_type;
584 uid_t loginuid; /* loginuid of sender */ 565 uid_t loginuid; /* loginuid of sender */
585 struct audit_sig_info *sig_data; 566 struct audit_sig_info *sig_data;
586 char *ctx; 567 char *ctx = NULL;
587 u32 len; 568 u32 len;
588 569
589 err = audit_netlink_ok(skb, msg_type); 570 err = audit_netlink_ok(skb, msg_type);
@@ -634,23 +615,14 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
634 if (err < 0) return err; 615 if (err < 0) return err;
635 } 616 }
636 if (status_get->mask & AUDIT_STATUS_PID) { 617 if (status_get->mask & AUDIT_STATUS_PID) {
637 int old = audit_pid; 618 int new_pid = status_get->pid;
638 if (sid) { 619
639 if ((err = selinux_sid_to_string( 620 if (audit_enabled != AUDIT_OFF)
640 sid, &ctx, &len))) 621 audit_log_config_change("audit_pid", new_pid,
641 return err; 622 audit_pid, loginuid,
642 else 623 sid, 1);
643 audit_log(NULL, GFP_KERNEL, 624
644 AUDIT_CONFIG_CHANGE, 625 audit_pid = new_pid;
645 "audit_pid=%d old=%d by auid=%u subj=%s",
646 status_get->pid, old,
647 loginuid, ctx);
648 kfree(ctx);
649 } else
650 audit_log(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE,
651 "audit_pid=%d old=%d by auid=%u",
652 status_get->pid, old, loginuid);
653 audit_pid = status_get->pid;
654 } 626 }
655 if (status_get->mask & AUDIT_STATUS_RATE_LIMIT) 627 if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
656 err = audit_set_rate_limit(status_get->rate_limit, 628 err = audit_set_rate_limit(status_get->rate_limit,
@@ -673,64 +645,35 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
673 if (err) 645 if (err)
674 break; 646 break;
675 } 647 }
676 ab = audit_log_start(NULL, GFP_KERNEL, msg_type); 648 audit_log_common_recv_msg(&ab, msg_type, pid, uid,
677 if (ab) { 649 loginuid, sid);
678 audit_log_format(ab, 650
679 "user pid=%d uid=%u auid=%u", 651 if (msg_type != AUDIT_USER_TTY)
680 pid, uid, loginuid); 652 audit_log_format(ab, " msg='%.1024s'",
681 if (sid) { 653 (char *)data);
682 if (selinux_sid_to_string( 654 else {
683 sid, &ctx, &len)) { 655 int size;
684 audit_log_format(ab, 656
685 " ssid=%u", sid); 657 audit_log_format(ab, " msg=");
686 /* Maybe call audit_panic? */ 658 size = nlmsg_len(nlh);
687 } else 659 audit_log_n_untrustedstring(ab, size,
688 audit_log_format(ab, 660 data);
689 " subj=%s", ctx);
690 kfree(ctx);
691 }
692 if (msg_type != AUDIT_USER_TTY)
693 audit_log_format(ab, " msg='%.1024s'",
694 (char *)data);
695 else {
696 int size;
697
698 audit_log_format(ab, " msg=");
699 size = nlmsg_len(nlh);
700 audit_log_n_untrustedstring(ab, size,
701 data);
702 }
703 audit_set_pid(ab, pid);
704 audit_log_end(ab);
705 } 661 }
662 audit_set_pid(ab, pid);
663 audit_log_end(ab);
706 } 664 }
707 break; 665 break;
708 case AUDIT_ADD: 666 case AUDIT_ADD:
709 case AUDIT_DEL: 667 case AUDIT_DEL:
710 if (nlmsg_len(nlh) < sizeof(struct audit_rule)) 668 if (nlmsg_len(nlh) < sizeof(struct audit_rule))
711 return -EINVAL; 669 return -EINVAL;
712 if (audit_enabled == 2) { 670 if (audit_enabled == AUDIT_LOCKED) {
713 ab = audit_log_start(NULL, GFP_KERNEL, 671 audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
714 AUDIT_CONFIG_CHANGE); 672 uid, loginuid, sid);
715 if (ab) { 673
716 audit_log_format(ab, 674 audit_log_format(ab, " audit_enabled=%d res=0",
717 "pid=%d uid=%u auid=%u", 675 audit_enabled);
718 pid, uid, loginuid); 676 audit_log_end(ab);
719 if (sid) {
720 if (selinux_sid_to_string(
721 sid, &ctx, &len)) {
722 audit_log_format(ab,
723 " ssid=%u", sid);
724 /* Maybe call audit_panic? */
725 } else
726 audit_log_format(ab,
727 " subj=%s", ctx);
728 kfree(ctx);
729 }
730 audit_log_format(ab, " audit_enabled=%d res=0",
731 audit_enabled);
732 audit_log_end(ab);
733 }
734 return -EPERM; 677 return -EPERM;
735 } 678 }
736 /* fallthrough */ 679 /* fallthrough */
@@ -743,28 +686,13 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
743 case AUDIT_DEL_RULE: 686 case AUDIT_DEL_RULE:
744 if (nlmsg_len(nlh) < sizeof(struct audit_rule_data)) 687 if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
745 return -EINVAL; 688 return -EINVAL;
746 if (audit_enabled == 2) { 689 if (audit_enabled == AUDIT_LOCKED) {
747 ab = audit_log_start(NULL, GFP_KERNEL, 690 audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
748 AUDIT_CONFIG_CHANGE); 691 uid, loginuid, sid);
749 if (ab) { 692
750 audit_log_format(ab, 693 audit_log_format(ab, " audit_enabled=%d res=0",
751 "pid=%d uid=%u auid=%u", 694 audit_enabled);
752 pid, uid, loginuid); 695 audit_log_end(ab);
753 if (sid) {
754 if (selinux_sid_to_string(
755 sid, &ctx, &len)) {
756 audit_log_format(ab,
757 " ssid=%u", sid);
758 /* Maybe call audit_panic? */
759 } else
760 audit_log_format(ab,
761 " subj=%s", ctx);
762 kfree(ctx);
763 }
764 audit_log_format(ab, " audit_enabled=%d res=0",
765 audit_enabled);
766 audit_log_end(ab);
767 }
768 return -EPERM; 696 return -EPERM;
769 } 697 }
770 /* fallthrough */ 698 /* fallthrough */
@@ -775,19 +703,10 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
775 break; 703 break;
776 case AUDIT_TRIM: 704 case AUDIT_TRIM:
777 audit_trim_trees(); 705 audit_trim_trees();
778 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); 706
779 if (!ab) 707 audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
780 break; 708 uid, loginuid, sid);
781 audit_log_format(ab, "auid=%u", loginuid); 709
782 if (sid) {
783 u32 len;
784 ctx = NULL;
785 if (selinux_sid_to_string(sid, &ctx, &len))
786 audit_log_format(ab, " ssid=%u", sid);
787 else
788 audit_log_format(ab, " subj=%s", ctx);
789 kfree(ctx);
790 }
791 audit_log_format(ab, " op=trim res=1"); 710 audit_log_format(ab, " op=trim res=1");
792 audit_log_end(ab); 711 audit_log_end(ab);
793 break; 712 break;
@@ -817,22 +736,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
817 /* OK, here comes... */ 736 /* OK, here comes... */
818 err = audit_tag_tree(old, new); 737 err = audit_tag_tree(old, new);
819 738
820 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); 739 audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
821 if (!ab) { 740 uid, loginuid, sid);
822 kfree(old); 741
823 kfree(new);
824 break;
825 }
826 audit_log_format(ab, "auid=%u", loginuid);
827 if (sid) {
828 u32 len;
829 ctx = NULL;
830 if (selinux_sid_to_string(sid, &ctx, &len))
831 audit_log_format(ab, " ssid=%u", sid);
832 else
833 audit_log_format(ab, " subj=%s", ctx);
834 kfree(ctx);
835 }
836 audit_log_format(ab, " op=make_equiv old="); 742 audit_log_format(ab, " op=make_equiv old=");
837 audit_log_untrustedstring(ab, old); 743 audit_log_untrustedstring(ab, old);
838 audit_log_format(ab, " new="); 744 audit_log_format(ab, " new=");
@@ -965,6 +871,7 @@ static int __init audit_init(void)
965 skb_queue_head_init(&audit_skb_queue); 871 skb_queue_head_init(&audit_skb_queue);
966 audit_initialized = 1; 872 audit_initialized = 1;
967 audit_enabled = audit_default; 873 audit_enabled = audit_default;
874 audit_ever_enabled |= !!audit_default;
968 875
969 /* Register the callback with selinux. This callback will be invoked 876 /* Register the callback with selinux. This callback will be invoked
970 * when a new policy is loaded. */ 877 * when a new policy is loaded. */
@@ -992,8 +899,10 @@ static int __init audit_enable(char *str)
992 printk(KERN_INFO "audit: %s%s\n", 899 printk(KERN_INFO "audit: %s%s\n",
993 audit_default ? "enabled" : "disabled", 900 audit_default ? "enabled" : "disabled",
994 audit_initialized ? "" : " (after initialization)"); 901 audit_initialized ? "" : " (after initialization)");
995 if (audit_initialized) 902 if (audit_initialized) {
996 audit_enabled = audit_default; 903 audit_enabled = audit_default;
904 audit_ever_enabled |= !!audit_default;
905 }
997 return 1; 906 return 1;
998} 907}
999 908
@@ -1130,7 +1039,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
1130{ 1039{
1131 struct audit_buffer *ab = NULL; 1040 struct audit_buffer *ab = NULL;
1132 struct timespec t; 1041 struct timespec t;
1133 unsigned int serial; 1042 unsigned int uninitialized_var(serial);
1134 int reserve; 1043 int reserve;
1135 unsigned long timeout_start = jiffies; 1044 unsigned long timeout_start = jiffies;
1136 1045
@@ -1164,7 +1073,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
1164 remove_wait_queue(&audit_backlog_wait, &wait); 1073 remove_wait_queue(&audit_backlog_wait, &wait);
1165 continue; 1074 continue;
1166 } 1075 }
1167 if (audit_rate_check()) 1076 if (audit_rate_check() && printk_ratelimit())
1168 printk(KERN_WARNING 1077 printk(KERN_WARNING
1169 "audit: audit_backlog=%d > " 1078 "audit: audit_backlog=%d > "
1170 "audit_backlog_limit=%d\n", 1079 "audit_backlog_limit=%d\n",
@@ -1249,6 +1158,7 @@ static void audit_log_vformat(struct audit_buffer *ab, const char *fmt,
1249 goto out; 1158 goto out;
1250 len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2); 1159 len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2);
1251 } 1160 }
1161 va_end(args2);
1252 if (len > 0) 1162 if (len > 0)
1253 skb_put(skb, len); 1163 skb_put(skb, len);
1254out: 1164out:
@@ -1350,6 +1260,21 @@ static void audit_log_n_string(struct audit_buffer *ab, size_t slen,
1350} 1260}
1351 1261
1352/** 1262/**
1263 * audit_string_contains_control - does a string need to be logged in hex
1264 * @string - string to be checked
1265 * @len - max length of the string to check
1266 */
1267int audit_string_contains_control(const char *string, size_t len)
1268{
1269 const unsigned char *p;
1270 for (p = string; p < (const unsigned char *)string + len && *p; p++) {
1271 if (*p == '"' || *p < 0x21 || *p > 0x7f)
1272 return 1;
1273 }
1274 return 0;
1275}
1276
1277/**
1353 * audit_log_n_untrustedstring - log a string that may contain random characters 1278 * audit_log_n_untrustedstring - log a string that may contain random characters
1354 * @ab: audit_buffer 1279 * @ab: audit_buffer
1355 * @len: lenth of string (not including trailing null) 1280 * @len: lenth of string (not including trailing null)
@@ -1363,19 +1288,13 @@ static void audit_log_n_string(struct audit_buffer *ab, size_t slen,
1363 * The caller specifies the number of characters in the string to log, which may 1288 * The caller specifies the number of characters in the string to log, which may
1364 * or may not be the entire string. 1289 * or may not be the entire string.
1365 */ 1290 */
1366const char *audit_log_n_untrustedstring(struct audit_buffer *ab, size_t len, 1291void audit_log_n_untrustedstring(struct audit_buffer *ab, size_t len,
1367 const char *string) 1292 const char *string)
1368{ 1293{
1369 const unsigned char *p; 1294 if (audit_string_contains_control(string, len))
1370 1295 audit_log_hex(ab, string, len);
1371 for (p = string; p < (const unsigned char *)string + len && *p; p++) { 1296 else
1372 if (*p == '"' || *p < 0x21 || *p > 0x7f) { 1297 audit_log_n_string(ab, len, string);
1373 audit_log_hex(ab, string, len);
1374 return string + len + 1;
1375 }
1376 }
1377 audit_log_n_string(ab, len, string);
1378 return p + 1;
1379} 1298}
1380 1299
1381/** 1300/**
@@ -1386,9 +1305,9 @@ const char *audit_log_n_untrustedstring(struct audit_buffer *ab, size_t len,
1386 * Same as audit_log_n_untrustedstring(), except that strlen is used to 1305 * Same as audit_log_n_untrustedstring(), except that strlen is used to
1387 * determine string length. 1306 * determine string length.
1388 */ 1307 */
1389const char *audit_log_untrustedstring(struct audit_buffer *ab, const char *string) 1308void audit_log_untrustedstring(struct audit_buffer *ab, const char *string)
1390{ 1309{
1391 return audit_log_n_untrustedstring(ab, strlen(string), string); 1310 audit_log_n_untrustedstring(ab, strlen(string), string);
1392} 1311}
1393 1312
1394/* This is a helper-function to print the escaped d_path */ 1313/* This is a helper-function to print the escaped d_path */
@@ -1437,8 +1356,11 @@ void audit_log_end(struct audit_buffer *ab)
1437 skb_queue_tail(&audit_skb_queue, ab->skb); 1356 skb_queue_tail(&audit_skb_queue, ab->skb);
1438 ab->skb = NULL; 1357 ab->skb = NULL;
1439 wake_up_interruptible(&kauditd_wait); 1358 wake_up_interruptible(&kauditd_wait);
1359 } else if (printk_ratelimit()) {
1360 struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
1361 printk(KERN_NOTICE "type=%d %s\n", nlh->nlmsg_type, ab->skb->data + NLMSG_SPACE(0));
1440 } else { 1362 } else {
1441 printk(KERN_NOTICE "%s\n", ab->skb->data + NLMSG_SPACE(0)); 1363 audit_log_lost("printk limit exceeded\n");
1442 } 1364 }
1443 } 1365 }
1444 audit_buffer_free(ab); 1366 audit_buffer_free(ab);
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 5d96f2cc7be8..6f19fd477aac 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -95,6 +95,8 @@ extern struct inotify_handle *audit_ih;
95/* Inotify events we care about. */ 95/* Inotify events we care about. */
96#define AUDIT_IN_WATCH IN_MOVE|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF 96#define AUDIT_IN_WATCH IN_MOVE|IN_CREATE|IN_DELETE|IN_DELETE_SELF|IN_MOVE_SELF
97 97
98extern int audit_enabled;
99
98void audit_free_parent(struct inotify_watch *i_watch) 100void audit_free_parent(struct inotify_watch *i_watch)
99{ 101{
100 struct audit_parent *parent; 102 struct audit_parent *parent;
@@ -974,7 +976,6 @@ static void audit_update_watch(struct audit_parent *parent,
974 struct audit_watch *owatch, *nwatch, *nextw; 976 struct audit_watch *owatch, *nwatch, *nextw;
975 struct audit_krule *r, *nextr; 977 struct audit_krule *r, *nextr;
976 struct audit_entry *oentry, *nentry; 978 struct audit_entry *oentry, *nentry;
977 struct audit_buffer *ab;
978 979
979 mutex_lock(&audit_filter_mutex); 980 mutex_lock(&audit_filter_mutex);
980 list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) { 981 list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
@@ -1014,13 +1015,18 @@ static void audit_update_watch(struct audit_parent *parent,
1014 call_rcu(&oentry->rcu, audit_free_rule_rcu); 1015 call_rcu(&oentry->rcu, audit_free_rule_rcu);
1015 } 1016 }
1016 1017
1017 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); 1018 if (audit_enabled) {
1018 audit_log_format(ab, "op=updated rules specifying path="); 1019 struct audit_buffer *ab;
1019 audit_log_untrustedstring(ab, owatch->path); 1020 ab = audit_log_start(NULL, GFP_KERNEL,
1020 audit_log_format(ab, " with dev=%u ino=%lu\n", dev, ino); 1021 AUDIT_CONFIG_CHANGE);
1021 audit_log_format(ab, " list=%d res=1", r->listnr); 1022 audit_log_format(ab,
1022 audit_log_end(ab); 1023 "op=updated rules specifying path=");
1023 1024 audit_log_untrustedstring(ab, owatch->path);
1025 audit_log_format(ab, " with dev=%u ino=%lu\n",
1026 dev, ino);
1027 audit_log_format(ab, " list=%d res=1", r->listnr);
1028 audit_log_end(ab);
1029 }
1024 audit_remove_watch(owatch); 1030 audit_remove_watch(owatch);
1025 goto add_watch_to_parent; /* event applies to a single watch */ 1031 goto add_watch_to_parent; /* event applies to a single watch */
1026 } 1032 }
@@ -1039,25 +1045,28 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
1039 struct audit_watch *w, *nextw; 1045 struct audit_watch *w, *nextw;
1040 struct audit_krule *r, *nextr; 1046 struct audit_krule *r, *nextr;
1041 struct audit_entry *e; 1047 struct audit_entry *e;
1042 struct audit_buffer *ab;
1043 1048
1044 mutex_lock(&audit_filter_mutex); 1049 mutex_lock(&audit_filter_mutex);
1045 parent->flags |= AUDIT_PARENT_INVALID; 1050 parent->flags |= AUDIT_PARENT_INVALID;
1046 list_for_each_entry_safe(w, nextw, &parent->watches, wlist) { 1051 list_for_each_entry_safe(w, nextw, &parent->watches, wlist) {
1047 list_for_each_entry_safe(r, nextr, &w->rules, rlist) { 1052 list_for_each_entry_safe(r, nextr, &w->rules, rlist) {
1048 e = container_of(r, struct audit_entry, rule); 1053 e = container_of(r, struct audit_entry, rule);
1049 1054 if (audit_enabled) {
1050 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); 1055 struct audit_buffer *ab;
1051 audit_log_format(ab, "op=remove rule path="); 1056 ab = audit_log_start(NULL, GFP_KERNEL,
1052 audit_log_untrustedstring(ab, w->path); 1057 AUDIT_CONFIG_CHANGE);
1053 if (r->filterkey) { 1058 audit_log_format(ab, "op=remove rule path=");
1054 audit_log_format(ab, " key="); 1059 audit_log_untrustedstring(ab, w->path);
1055 audit_log_untrustedstring(ab, r->filterkey); 1060 if (r->filterkey) {
1056 } else 1061 audit_log_format(ab, " key=");
1057 audit_log_format(ab, " key=(null)"); 1062 audit_log_untrustedstring(ab,
1058 audit_log_format(ab, " list=%d res=1", r->listnr); 1063 r->filterkey);
1059 audit_log_end(ab); 1064 } else
1060 1065 audit_log_format(ab, " key=(null)");
1066 audit_log_format(ab, " list=%d res=1",
1067 r->listnr);
1068 audit_log_end(ab);
1069 }
1061 list_del(&r->rlist); 1070 list_del(&r->rlist);
1062 list_del_rcu(&e->list); 1071 list_del_rcu(&e->list);
1063 call_rcu(&e->rcu, audit_free_rule_rcu); 1072 call_rcu(&e->rcu, audit_free_rule_rcu);
@@ -1495,6 +1504,9 @@ static void audit_log_rule_change(uid_t loginuid, u32 sid, char *action,
1495{ 1504{
1496 struct audit_buffer *ab; 1505 struct audit_buffer *ab;
1497 1506
1507 if (!audit_enabled)
1508 return;
1509
1498 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); 1510 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
1499 if (!ab) 1511 if (!ab)
1500 return; 1512 return;
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index bce9ecdb7712..1c06ecf38d7b 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -70,6 +70,7 @@
70#include "audit.h" 70#include "audit.h"
71 71
72extern struct list_head audit_filter_list[]; 72extern struct list_head audit_filter_list[];
73extern int audit_ever_enabled;
73 74
74/* AUDIT_NAMES is the number of slots we reserve in the audit_context 75/* AUDIT_NAMES is the number of slots we reserve in the audit_context
75 * for saving names from getname(). */ 76 * for saving names from getname(). */
@@ -78,6 +79,9 @@ extern struct list_head audit_filter_list[];
78/* Indicates that audit should log the full pathname. */ 79/* Indicates that audit should log the full pathname. */
79#define AUDIT_NAME_FULL -1 80#define AUDIT_NAME_FULL -1
80 81
82/* no execve audit message should be longer than this (userspace limits) */
83#define MAX_EXECVE_AUDIT_LEN 7500
84
81/* number of audit rules */ 85/* number of audit rules */
82int audit_n_rules; 86int audit_n_rules;
83 87
@@ -176,7 +180,11 @@ struct audit_aux_data_fd_pair {
176struct audit_aux_data_pids { 180struct audit_aux_data_pids {
177 struct audit_aux_data d; 181 struct audit_aux_data d;
178 pid_t target_pid[AUDIT_AUX_PIDS]; 182 pid_t target_pid[AUDIT_AUX_PIDS];
183 uid_t target_auid[AUDIT_AUX_PIDS];
184 uid_t target_uid[AUDIT_AUX_PIDS];
185 unsigned int target_sessionid[AUDIT_AUX_PIDS];
179 u32 target_sid[AUDIT_AUX_PIDS]; 186 u32 target_sid[AUDIT_AUX_PIDS];
187 char target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
180 int pid_count; 188 int pid_count;
181}; 189};
182 190
@@ -192,7 +200,6 @@ struct audit_context {
192 enum audit_state state; 200 enum audit_state state;
193 unsigned int serial; /* serial number for record */ 201 unsigned int serial; /* serial number for record */
194 struct timespec ctime; /* time of syscall entry */ 202 struct timespec ctime; /* time of syscall entry */
195 uid_t loginuid; /* login uid (identity) */
196 int major; /* syscall number */ 203 int major; /* syscall number */
197 unsigned long argv[4]; /* syscall arguments */ 204 unsigned long argv[4]; /* syscall arguments */
198 int return_valid; /* return code is valid */ 205 int return_valid; /* return code is valid */
@@ -215,7 +222,11 @@ struct audit_context {
215 int arch; 222 int arch;
216 223
217 pid_t target_pid; 224 pid_t target_pid;
225 uid_t target_auid;
226 uid_t target_uid;
227 unsigned int target_sessionid;
218 u32 target_sid; 228 u32 target_sid;
229 char target_comm[TASK_COMM_LEN];
219 230
220 struct audit_tree_refs *trees, *first_trees; 231 struct audit_tree_refs *trees, *first_trees;
221 int tree_count; 232 int tree_count;
@@ -506,7 +517,7 @@ static int audit_filter_rules(struct task_struct *tsk,
506 case AUDIT_LOGINUID: 517 case AUDIT_LOGINUID:
507 result = 0; 518 result = 0;
508 if (ctx) 519 if (ctx)
509 result = audit_comparator(ctx->loginuid, f->op, f->val); 520 result = audit_comparator(tsk->loginuid, f->op, f->val);
510 break; 521 break;
511 case AUDIT_SUBJ_USER: 522 case AUDIT_SUBJ_USER:
512 case AUDIT_SUBJ_ROLE: 523 case AUDIT_SUBJ_ROLE:
@@ -702,7 +713,24 @@ static inline struct audit_context *audit_get_context(struct task_struct *tsk,
702 if (likely(!context)) 713 if (likely(!context))
703 return NULL; 714 return NULL;
704 context->return_valid = return_valid; 715 context->return_valid = return_valid;
705 context->return_code = return_code; 716
717 /*
718 * we need to fix up the return code in the audit logs if the actual
719 * return codes are later going to be fixed up by the arch specific
720 * signal handlers
721 *
722 * This is actually a test for:
723 * (rc == ERESTARTSYS ) || (rc == ERESTARTNOINTR) ||
724 * (rc == ERESTARTNOHAND) || (rc == ERESTART_RESTARTBLOCK)
725 *
726 * but is faster than a bunch of ||
727 */
728 if (unlikely(return_code <= -ERESTARTSYS) &&
729 (return_code >= -ERESTART_RESTARTBLOCK) &&
730 (return_code != -ENOIOCTLCMD))
731 context->return_code = -EINTR;
732 else
733 context->return_code = return_code;
706 734
707 if (context->in_syscall && !context->dummy && !context->auditable) { 735 if (context->in_syscall && !context->dummy && !context->auditable) {
708 enum audit_state state; 736 enum audit_state state;
@@ -783,11 +811,8 @@ static inline void audit_free_aux(struct audit_context *context)
783static inline void audit_zero_context(struct audit_context *context, 811static inline void audit_zero_context(struct audit_context *context,
784 enum audit_state state) 812 enum audit_state state)
785{ 813{
786 uid_t loginuid = context->loginuid;
787
788 memset(context, 0, sizeof(*context)); 814 memset(context, 0, sizeof(*context));
789 context->state = state; 815 context->state = state;
790 context->loginuid = loginuid;
791} 816}
792 817
793static inline struct audit_context *audit_alloc_context(enum audit_state state) 818static inline struct audit_context *audit_alloc_context(enum audit_state state)
@@ -814,7 +839,7 @@ int audit_alloc(struct task_struct *tsk)
814 struct audit_context *context; 839 struct audit_context *context;
815 enum audit_state state; 840 enum audit_state state;
816 841
817 if (likely(!audit_enabled)) 842 if (likely(!audit_ever_enabled))
818 return 0; /* Return if not auditing. */ 843 return 0; /* Return if not auditing. */
819 844
820 state = audit_filter_task(tsk); 845 state = audit_filter_task(tsk);
@@ -826,11 +851,6 @@ int audit_alloc(struct task_struct *tsk)
826 return -ENOMEM; 851 return -ENOMEM;
827 } 852 }
828 853
829 /* Preserve login uid */
830 context->loginuid = -1;
831 if (current->audit_context)
832 context->loginuid = current->audit_context->loginuid;
833
834 tsk->audit_context = context; 854 tsk->audit_context = context;
835 set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT); 855 set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
836 return 0; 856 return 0;
@@ -922,7 +942,8 @@ static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk
922} 942}
923 943
924static int audit_log_pid_context(struct audit_context *context, pid_t pid, 944static int audit_log_pid_context(struct audit_context *context, pid_t pid,
925 u32 sid) 945 uid_t auid, uid_t uid, unsigned int sessionid,
946 u32 sid, char *comm)
926{ 947{
927 struct audit_buffer *ab; 948 struct audit_buffer *ab;
928 char *s = NULL; 949 char *s = NULL;
@@ -931,68 +952,204 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid,
931 952
932 ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID); 953 ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
933 if (!ab) 954 if (!ab)
934 return 1; 955 return rc;
935 956
957 audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid, auid,
958 uid, sessionid);
936 if (selinux_sid_to_string(sid, &s, &len)) { 959 if (selinux_sid_to_string(sid, &s, &len)) {
937 audit_log_format(ab, "opid=%d obj=(none)", pid); 960 audit_log_format(ab, " obj=(none)");
938 rc = 1; 961 rc = 1;
939 } else 962 } else
940 audit_log_format(ab, "opid=%d obj=%s", pid, s); 963 audit_log_format(ab, " obj=%s", s);
964 audit_log_format(ab, " ocomm=");
965 audit_log_untrustedstring(ab, comm);
941 audit_log_end(ab); 966 audit_log_end(ab);
942 kfree(s); 967 kfree(s);
943 968
944 return rc; 969 return rc;
945} 970}
946 971
947static void audit_log_execve_info(struct audit_buffer *ab, 972/*
948 struct audit_aux_data_execve *axi) 973 * to_send and len_sent accounting are very loose estimates. We aren't
974 * really worried about a hard cap to MAX_EXECVE_AUDIT_LEN so much as being
975 * within about 500 bytes (next page boundry)
976 *
977 * why snprintf? an int is up to 12 digits long. if we just assumed when
978 * logging that a[%d]= was going to be 16 characters long we would be wasting
979 * space in every audit message. In one 7500 byte message we can log up to
980 * about 1000 min size arguments. That comes down to about 50% waste of space
981 * if we didn't do the snprintf to find out how long arg_num_len was.
982 */
983static int audit_log_single_execve_arg(struct audit_context *context,
984 struct audit_buffer **ab,
985 int arg_num,
986 size_t *len_sent,
987 const char __user *p,
988 char *buf)
949{ 989{
950 int i; 990 char arg_num_len_buf[12];
951 long len, ret; 991 const char __user *tmp_p = p;
952 const char __user *p; 992 /* how many digits are in arg_num? 3 is the length of a=\n */
953 char *buf; 993 size_t arg_num_len = snprintf(arg_num_len_buf, 12, "%d", arg_num) + 3;
994 size_t len, len_left, to_send;
995 size_t max_execve_audit_len = MAX_EXECVE_AUDIT_LEN;
996 unsigned int i, has_cntl = 0, too_long = 0;
997 int ret;
998
999 /* strnlen_user includes the null we don't want to send */
1000 len_left = len = strnlen_user(p, MAX_ARG_STRLEN) - 1;
954 1001
955 if (axi->mm != current->mm) 1002 /*
956 return; /* execve failed, no additional info */ 1003 * We just created this mm, if we can't find the strings
957 1004 * we just copied into it something is _very_ wrong. Similar
958 p = (const char __user *)axi->mm->arg_start; 1005 * for strings that are too long, we should not have created
1006 * any.
1007 */
1008 if (unlikely((len = -1) || len > MAX_ARG_STRLEN - 1)) {
1009 WARN_ON(1);
1010 send_sig(SIGKILL, current, 0);
1011 }
959 1012
960 for (i = 0; i < axi->argc; i++, p += len) { 1013 /* walk the whole argument looking for non-ascii chars */
961 len = strnlen_user(p, MAX_ARG_STRLEN); 1014 do {
1015 if (len_left > MAX_EXECVE_AUDIT_LEN)
1016 to_send = MAX_EXECVE_AUDIT_LEN;
1017 else
1018 to_send = len_left;
1019 ret = copy_from_user(buf, tmp_p, to_send);
962 /* 1020 /*
963 * We just created this mm, if we can't find the strings 1021 * There is no reason for this copy to be short. We just
964 * we just copied into it something is _very_ wrong. Similar 1022 * copied them here, and the mm hasn't been exposed to user-
965 * for strings that are too long, we should not have created 1023 * space yet.
966 * any.
967 */ 1024 */
968 if (!len || len > MAX_ARG_STRLEN) { 1025 if (ret) {
969 WARN_ON(1); 1026 WARN_ON(1);
970 send_sig(SIGKILL, current, 0); 1027 send_sig(SIGKILL, current, 0);
971 } 1028 }
972 1029 buf[to_send] = '\0';
973 buf = kmalloc(len, GFP_KERNEL); 1030 has_cntl = audit_string_contains_control(buf, to_send);
974 if (!buf) { 1031 if (has_cntl) {
975 audit_panic("out of memory for argv string\n"); 1032 /*
1033 * hex messages get logged as 2 bytes, so we can only
1034 * send half as much in each message
1035 */
1036 max_execve_audit_len = MAX_EXECVE_AUDIT_LEN / 2;
976 break; 1037 break;
977 } 1038 }
1039 len_left -= to_send;
1040 tmp_p += to_send;
1041 } while (len_left > 0);
1042
1043 len_left = len;
1044
1045 if (len > max_execve_audit_len)
1046 too_long = 1;
1047
1048 /* rewalk the argument actually logging the message */
1049 for (i = 0; len_left > 0; i++) {
1050 int room_left;
1051
1052 if (len_left > max_execve_audit_len)
1053 to_send = max_execve_audit_len;
1054 else
1055 to_send = len_left;
1056
1057 /* do we have space left to send this argument in this ab? */
1058 room_left = MAX_EXECVE_AUDIT_LEN - arg_num_len - *len_sent;
1059 if (has_cntl)
1060 room_left -= (to_send * 2);
1061 else
1062 room_left -= to_send;
1063 if (room_left < 0) {
1064 *len_sent = 0;
1065 audit_log_end(*ab);
1066 *ab = audit_log_start(context, GFP_KERNEL, AUDIT_EXECVE);
1067 if (!*ab)
1068 return 0;
1069 }
978 1070
979 ret = copy_from_user(buf, p, len);
980 /* 1071 /*
981 * There is no reason for this copy to be short. We just 1072 * first record needs to say how long the original string was
982 * copied them here, and the mm hasn't been exposed to user- 1073 * so we can be sure nothing was lost.
983 * space yet. 1074 */
1075 if ((i == 0) && (too_long))
1076 audit_log_format(*ab, "a%d_len=%ld ", arg_num,
1077 has_cntl ? 2*len : len);
1078
1079 /*
1080 * normally arguments are small enough to fit and we already
1081 * filled buf above when we checked for control characters
1082 * so don't bother with another copy_from_user
984 */ 1083 */
1084 if (len >= max_execve_audit_len)
1085 ret = copy_from_user(buf, p, to_send);
1086 else
1087 ret = 0;
985 if (ret) { 1088 if (ret) {
986 WARN_ON(1); 1089 WARN_ON(1);
987 send_sig(SIGKILL, current, 0); 1090 send_sig(SIGKILL, current, 0);
988 } 1091 }
1092 buf[to_send] = '\0';
1093
1094 /* actually log it */
1095 audit_log_format(*ab, "a%d", arg_num);
1096 if (too_long)
1097 audit_log_format(*ab, "[%d]", i);
1098 audit_log_format(*ab, "=");
1099 if (has_cntl)
1100 audit_log_hex(*ab, buf, to_send);
1101 else
1102 audit_log_format(*ab, "\"%s\"", buf);
1103 audit_log_format(*ab, "\n");
1104
1105 p += to_send;
1106 len_left -= to_send;
1107 *len_sent += arg_num_len;
1108 if (has_cntl)
1109 *len_sent += to_send * 2;
1110 else
1111 *len_sent += to_send;
1112 }
1113 /* include the null we didn't log */
1114 return len + 1;
1115}
989 1116
990 audit_log_format(ab, "a%d=", i); 1117static void audit_log_execve_info(struct audit_context *context,
991 audit_log_untrustedstring(ab, buf); 1118 struct audit_buffer **ab,
992 audit_log_format(ab, "\n"); 1119 struct audit_aux_data_execve *axi)
1120{
1121 int i;
1122 size_t len, len_sent = 0;
1123 const char __user *p;
1124 char *buf;
1125
1126 if (axi->mm != current->mm)
1127 return; /* execve failed, no additional info */
1128
1129 p = (const char __user *)axi->mm->arg_start;
1130
1131 audit_log_format(*ab, "argc=%d ", axi->argc);
1132
1133 /*
1134 * we need some kernel buffer to hold the userspace args. Just
1135 * allocate one big one rather than allocating one of the right size
1136 * for every single argument inside audit_log_single_execve_arg()
1137 * should be <8k allocation so should be pretty safe.
1138 */
1139 buf = kmalloc(MAX_EXECVE_AUDIT_LEN + 1, GFP_KERNEL);
1140 if (!buf) {
1141 audit_panic("out of memory for argv string\n");
1142 return;
1143 }
993 1144
994 kfree(buf); 1145 for (i = 0; i < axi->argc; i++) {
1146 len = audit_log_single_execve_arg(context, ab, i,
1147 &len_sent, p, buf);
1148 if (len <= 0)
1149 break;
1150 p += len;
995 } 1151 }
1152 kfree(buf);
996} 1153}
997 1154
998static void audit_log_exit(struct audit_context *context, struct task_struct *tsk) 1155static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
@@ -1039,7 +1196,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
1039 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d" 1196 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
1040 " ppid=%d pid=%d auid=%u uid=%u gid=%u" 1197 " ppid=%d pid=%d auid=%u uid=%u gid=%u"
1041 " euid=%u suid=%u fsuid=%u" 1198 " euid=%u suid=%u fsuid=%u"
1042 " egid=%u sgid=%u fsgid=%u tty=%s", 1199 " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
1043 context->argv[0], 1200 context->argv[0],
1044 context->argv[1], 1201 context->argv[1],
1045 context->argv[2], 1202 context->argv[2],
@@ -1047,11 +1204,12 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
1047 context->name_count, 1204 context->name_count,
1048 context->ppid, 1205 context->ppid,
1049 context->pid, 1206 context->pid,
1050 context->loginuid, 1207 tsk->loginuid,
1051 context->uid, 1208 context->uid,
1052 context->gid, 1209 context->gid,
1053 context->euid, context->suid, context->fsuid, 1210 context->euid, context->suid, context->fsuid,
1054 context->egid, context->sgid, context->fsgid, tty); 1211 context->egid, context->sgid, context->fsgid, tty,
1212 tsk->sessionid);
1055 1213
1056 mutex_unlock(&tty_mutex); 1214 mutex_unlock(&tty_mutex);
1057 1215
@@ -1135,7 +1293,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
1135 1293
1136 case AUDIT_EXECVE: { 1294 case AUDIT_EXECVE: {
1137 struct audit_aux_data_execve *axi = (void *)aux; 1295 struct audit_aux_data_execve *axi = (void *)aux;
1138 audit_log_execve_info(ab, axi); 1296 audit_log_execve_info(context, &ab, axi);
1139 break; } 1297 break; }
1140 1298
1141 case AUDIT_SOCKETCALL: { 1299 case AUDIT_SOCKETCALL: {
@@ -1168,13 +1326,19 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
1168 1326
1169 for (i = 0; i < axs->pid_count; i++) 1327 for (i = 0; i < axs->pid_count; i++)
1170 if (audit_log_pid_context(context, axs->target_pid[i], 1328 if (audit_log_pid_context(context, axs->target_pid[i],
1171 axs->target_sid[i])) 1329 axs->target_auid[i],
1330 axs->target_uid[i],
1331 axs->target_sessionid[i],
1332 axs->target_sid[i],
1333 axs->target_comm[i]))
1172 call_panic = 1; 1334 call_panic = 1;
1173 } 1335 }
1174 1336
1175 if (context->target_pid && 1337 if (context->target_pid &&
1176 audit_log_pid_context(context, context->target_pid, 1338 audit_log_pid_context(context, context->target_pid,
1177 context->target_sid)) 1339 context->target_auid, context->target_uid,
1340 context->target_sessionid,
1341 context->target_sid, context->target_comm))
1178 call_panic = 1; 1342 call_panic = 1;
1179 1343
1180 if (context->pwd && context->pwdmnt) { 1344 if (context->pwd && context->pwdmnt) {
@@ -1242,6 +1406,11 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
1242 1406
1243 audit_log_end(ab); 1407 audit_log_end(ab);
1244 } 1408 }
1409
1410 /* Send end of event record to help user space know we are finished */
1411 ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
1412 if (ab)
1413 audit_log_end(ab);
1245 if (call_panic) 1414 if (call_panic)
1246 audit_panic("error converting sid to string"); 1415 audit_panic("error converting sid to string");
1247} 1416}
@@ -1766,6 +1935,9 @@ void auditsc_get_stamp(struct audit_context *ctx,
1766 ctx->auditable = 1; 1935 ctx->auditable = 1;
1767} 1936}
1768 1937
1938/* global counter which is incremented every time something logs in */
1939static atomic_t session_id = ATOMIC_INIT(0);
1940
1769/** 1941/**
1770 * audit_set_loginuid - set a task's audit_context loginuid 1942 * audit_set_loginuid - set a task's audit_context loginuid
1771 * @task: task whose audit context is being modified 1943 * @task: task whose audit context is being modified
@@ -1777,41 +1949,29 @@ void auditsc_get_stamp(struct audit_context *ctx,
1777 */ 1949 */
1778int audit_set_loginuid(struct task_struct *task, uid_t loginuid) 1950int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
1779{ 1951{
1952 unsigned int sessionid = atomic_inc_return(&session_id);
1780 struct audit_context *context = task->audit_context; 1953 struct audit_context *context = task->audit_context;
1781 1954
1782 if (context) { 1955 if (context && context->in_syscall) {
1783 /* Only log if audit is enabled */ 1956 struct audit_buffer *ab;
1784 if (context->in_syscall) { 1957
1785 struct audit_buffer *ab; 1958 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
1786 1959 if (ab) {
1787 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN); 1960 audit_log_format(ab, "login pid=%d uid=%u "
1788 if (ab) { 1961 "old auid=%u new auid=%u"
1789 audit_log_format(ab, "login pid=%d uid=%u " 1962 " old ses=%u new ses=%u",
1790 "old auid=%u new auid=%u", 1963 task->pid, task->uid,
1791 task->pid, task->uid, 1964 task->loginuid, loginuid,
1792 context->loginuid, loginuid); 1965 task->sessionid, sessionid);
1793 audit_log_end(ab); 1966 audit_log_end(ab);
1794 }
1795 } 1967 }
1796 context->loginuid = loginuid;
1797 } 1968 }
1969 task->sessionid = sessionid;
1970 task->loginuid = loginuid;
1798 return 0; 1971 return 0;
1799} 1972}
1800 1973
1801/** 1974/**
1802 * audit_get_loginuid - get the loginuid for an audit_context
1803 * @ctx: the audit_context
1804 *
1805 * Returns the context's loginuid or -1 if @ctx is NULL.
1806 */
1807uid_t audit_get_loginuid(struct audit_context *ctx)
1808{
1809 return ctx ? ctx->loginuid : -1;
1810}
1811
1812EXPORT_SYMBOL(audit_get_loginuid);
1813
1814/**
1815 * __audit_mq_open - record audit data for a POSIX MQ open 1975 * __audit_mq_open - record audit data for a POSIX MQ open
1816 * @oflag: open flag 1976 * @oflag: open flag
1817 * @mode: mode bits 1977 * @mode: mode bits
@@ -2070,8 +2230,6 @@ int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode
2070 return 0; 2230 return 0;
2071} 2231}
2072 2232
2073int audit_argv_kb = 32;
2074
2075int audit_bprm(struct linux_binprm *bprm) 2233int audit_bprm(struct linux_binprm *bprm)
2076{ 2234{
2077 struct audit_aux_data_execve *ax; 2235 struct audit_aux_data_execve *ax;
@@ -2080,14 +2238,6 @@ int audit_bprm(struct linux_binprm *bprm)
2080 if (likely(!audit_enabled || !context || context->dummy)) 2238 if (likely(!audit_enabled || !context || context->dummy))
2081 return 0; 2239 return 0;
2082 2240
2083 /*
2084 * Even though the stack code doesn't limit the arg+env size any more,
2085 * the audit code requires that _all_ arguments be logged in a single
2086 * netlink skb. Hence cap it :-(
2087 */
2088 if (bprm->argv_len > (audit_argv_kb << 10))
2089 return -E2BIG;
2090
2091 ax = kmalloc(sizeof(*ax), GFP_KERNEL); 2241 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2092 if (!ax) 2242 if (!ax)
2093 return -ENOMEM; 2243 return -ENOMEM;
@@ -2193,7 +2343,11 @@ void __audit_ptrace(struct task_struct *t)
2193 struct audit_context *context = current->audit_context; 2343 struct audit_context *context = current->audit_context;
2194 2344
2195 context->target_pid = t->pid; 2345 context->target_pid = t->pid;
2346 context->target_auid = audit_get_loginuid(t);
2347 context->target_uid = t->uid;
2348 context->target_sessionid = audit_get_sessionid(t);
2196 selinux_get_task_sid(t, &context->target_sid); 2349 selinux_get_task_sid(t, &context->target_sid);
2350 memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
2197} 2351}
2198 2352
2199/** 2353/**
@@ -2216,8 +2370,8 @@ int __audit_signal_info(int sig, struct task_struct *t)
2216 if (audit_pid && t->tgid == audit_pid) { 2370 if (audit_pid && t->tgid == audit_pid) {
2217 if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) { 2371 if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) {
2218 audit_sig_pid = tsk->pid; 2372 audit_sig_pid = tsk->pid;
2219 if (ctx) 2373 if (tsk->loginuid != -1)
2220 audit_sig_uid = ctx->loginuid; 2374 audit_sig_uid = tsk->loginuid;
2221 else 2375 else
2222 audit_sig_uid = tsk->uid; 2376 audit_sig_uid = tsk->uid;
2223 selinux_get_task_sid(tsk, &audit_sig_sid); 2377 selinux_get_task_sid(tsk, &audit_sig_sid);
@@ -2230,7 +2384,11 @@ int __audit_signal_info(int sig, struct task_struct *t)
2230 * in audit_context */ 2384 * in audit_context */
2231 if (!ctx->target_pid) { 2385 if (!ctx->target_pid) {
2232 ctx->target_pid = t->tgid; 2386 ctx->target_pid = t->tgid;
2387 ctx->target_auid = audit_get_loginuid(t);
2388 ctx->target_uid = t->uid;
2389 ctx->target_sessionid = audit_get_sessionid(t);
2233 selinux_get_task_sid(t, &ctx->target_sid); 2390 selinux_get_task_sid(t, &ctx->target_sid);
2391 memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
2234 return 0; 2392 return 0;
2235 } 2393 }
2236 2394
@@ -2247,7 +2405,11 @@ int __audit_signal_info(int sig, struct task_struct *t)
2247 BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS); 2405 BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
2248 2406
2249 axp->target_pid[axp->pid_count] = t->tgid; 2407 axp->target_pid[axp->pid_count] = t->tgid;
2408 axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
2409 axp->target_uid[axp->pid_count] = t->uid;
2410 axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
2250 selinux_get_task_sid(t, &axp->target_sid[axp->pid_count]); 2411 selinux_get_task_sid(t, &axp->target_sid[axp->pid_count]);
2412 memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
2251 axp->pid_count++; 2413 axp->pid_count++;
2252 2414
2253 return 0; 2415 return 0;
@@ -2264,6 +2426,8 @@ void audit_core_dumps(long signr)
2264{ 2426{
2265 struct audit_buffer *ab; 2427 struct audit_buffer *ab;
2266 u32 sid; 2428 u32 sid;
2429 uid_t auid = audit_get_loginuid(current);
2430 unsigned int sessionid = audit_get_sessionid(current);
2267 2431
2268 if (!audit_enabled) 2432 if (!audit_enabled)
2269 return; 2433 return;
@@ -2272,9 +2436,8 @@ void audit_core_dumps(long signr)
2272 return; 2436 return;
2273 2437
2274 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND); 2438 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
2275 audit_log_format(ab, "auid=%u uid=%u gid=%u", 2439 audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
2276 audit_get_loginuid(current->audit_context), 2440 auid, current->uid, current->gid, sessionid);
2277 current->uid, current->gid);
2278 selinux_get_task_sid(current, &sid); 2441 selinux_get_task_sid(current, &sid);
2279 if (sid) { 2442 if (sid) {
2280 char *ctx = NULL; 2443 char *ctx = NULL;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 357b68ba23ec..7cb1ac3e6fff 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -81,7 +81,6 @@ extern int percpu_pagelist_fraction;
81extern int compat_log; 81extern int compat_log;
82extern int maps_protect; 82extern int maps_protect;
83extern int sysctl_stat_interval; 83extern int sysctl_stat_interval;
84extern int audit_argv_kb;
85extern int latencytop_enabled; 84extern int latencytop_enabled;
86 85
87/* Constants used for minimum and maximum */ 86/* Constants used for minimum and maximum */
@@ -390,16 +389,6 @@ static struct ctl_table kern_table[] = {
390 .mode = 0644, 389 .mode = 0644,
391 .proc_handler = &proc_dointvec, 390 .proc_handler = &proc_dointvec,
392 }, 391 },
393#ifdef CONFIG_AUDITSYSCALL
394 {
395 .ctl_name = CTL_UNNUMBERED,
396 .procname = "audit_argv_kb",
397 .data = &audit_argv_kb,
398 .maxlen = sizeof(int),
399 .mode = 0644,
400 .proc_handler = &proc_dointvec,
401 },
402#endif
403 { 392 {
404 .ctl_name = KERN_CORE_PATTERN, 393 .ctl_name = KERN_CORE_PATTERN,
405 .procname = "core_pattern", 394 .procname = "core_pattern",
diff --git a/net/core/dev.c b/net/core/dev.c
index edaff2720e10..9549417250bb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2752,12 +2752,15 @@ static void __dev_set_promiscuity(struct net_device *dev, int inc)
2752 printk(KERN_INFO "device %s %s promiscuous mode\n", 2752 printk(KERN_INFO "device %s %s promiscuous mode\n",
2753 dev->name, (dev->flags & IFF_PROMISC) ? "entered" : 2753 dev->name, (dev->flags & IFF_PROMISC) ? "entered" :
2754 "left"); 2754 "left");
2755 audit_log(current->audit_context, GFP_ATOMIC, 2755 if (audit_enabled)
2756 AUDIT_ANOM_PROMISCUOUS, 2756 audit_log(current->audit_context, GFP_ATOMIC,
2757 "dev=%s prom=%d old_prom=%d auid=%u", 2757 AUDIT_ANOM_PROMISCUOUS,
2758 dev->name, (dev->flags & IFF_PROMISC), 2758 "dev=%s prom=%d old_prom=%d auid=%u uid=%u gid=%u ses=%u",
2759 (old_flags & IFF_PROMISC), 2759 dev->name, (dev->flags & IFF_PROMISC),
2760 audit_get_loginuid(current->audit_context)); 2760 (old_flags & IFF_PROMISC),
2761 audit_get_loginuid(current),
2762 current->uid, current->gid,
2763 audit_get_sessionid(current));
2761 2764
2762 if (dev->change_rx_flags) 2765 if (dev->change_rx_flags)
2763 dev->change_rx_flags(dev, IFF_PROMISC); 2766 dev->change_rx_flags(dev, IFF_PROMISC);
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 16b72b5570c3..45c3c27d279a 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1466,7 +1466,7 @@ static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
1466 err = xfrm_state_update(x); 1466 err = xfrm_state_update(x);
1467 1467
1468 xfrm_audit_state_add(x, err ? 0 : 1, 1468 xfrm_audit_state_add(x, err ? 0 : 1,
1469 audit_get_loginuid(current->audit_context), 0); 1469 audit_get_loginuid(current), 0);
1470 1470
1471 if (err < 0) { 1471 if (err < 0) {
1472 x->km.state = XFRM_STATE_DEAD; 1472 x->km.state = XFRM_STATE_DEAD;
@@ -1520,7 +1520,7 @@ static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
1520 km_state_notify(x, &c); 1520 km_state_notify(x, &c);
1521out: 1521out:
1522 xfrm_audit_state_delete(x, err ? 0 : 1, 1522 xfrm_audit_state_delete(x, err ? 0 : 1,
1523 audit_get_loginuid(current->audit_context), 0); 1523 audit_get_loginuid(current), 0);
1524 xfrm_state_put(x); 1524 xfrm_state_put(x);
1525 1525
1526 return err; 1526 return err;
@@ -1695,7 +1695,7 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd
1695 if (proto == 0) 1695 if (proto == 0)
1696 return -EINVAL; 1696 return -EINVAL;
1697 1697
1698 audit_info.loginuid = audit_get_loginuid(current->audit_context); 1698 audit_info.loginuid = audit_get_loginuid(current);
1699 audit_info.secid = 0; 1699 audit_info.secid = 0;
1700 err = xfrm_state_flush(proto, &audit_info); 1700 err = xfrm_state_flush(proto, &audit_info);
1701 if (err) 1701 if (err)
@@ -2273,7 +2273,7 @@ static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
2273 hdr->sadb_msg_type != SADB_X_SPDUPDATE); 2273 hdr->sadb_msg_type != SADB_X_SPDUPDATE);
2274 2274
2275 xfrm_audit_policy_add(xp, err ? 0 : 1, 2275 xfrm_audit_policy_add(xp, err ? 0 : 1,
2276 audit_get_loginuid(current->audit_context), 0); 2276 audit_get_loginuid(current), 0);
2277 2277
2278 if (err) 2278 if (err)
2279 goto out; 2279 goto out;
@@ -2356,7 +2356,7 @@ static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg
2356 return -ENOENT; 2356 return -ENOENT;
2357 2357
2358 xfrm_audit_policy_delete(xp, err ? 0 : 1, 2358 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2359 audit_get_loginuid(current->audit_context), 0); 2359 audit_get_loginuid(current), 0);
2360 2360
2361 if (err) 2361 if (err)
2362 goto out; 2362 goto out;
@@ -2617,7 +2617,7 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
2617 2617
2618 if (delete) { 2618 if (delete) {
2619 xfrm_audit_policy_delete(xp, err ? 0 : 1, 2619 xfrm_audit_policy_delete(xp, err ? 0 : 1,
2620 audit_get_loginuid(current->audit_context), 0); 2620 audit_get_loginuid(current), 0);
2621 2621
2622 if (err) 2622 if (err)
2623 goto out; 2623 goto out;
@@ -2694,7 +2694,7 @@ static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg
2694 struct xfrm_audit audit_info; 2694 struct xfrm_audit audit_info;
2695 int err; 2695 int err;
2696 2696
2697 audit_info.loginuid = audit_get_loginuid(current->audit_context); 2697 audit_info.loginuid = audit_get_loginuid(current);
2698 audit_info.secid = 0; 2698 audit_info.secid = 0;
2699 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info); 2699 err = xfrm_policy_flush(XFRM_POLICY_TYPE_MAIN, &audit_info);
2700 if (err) 2700 if (err)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index ff9fb6ba0c5c..1ab0da2632e1 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1238,7 +1238,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
1238 1238
1239 NETLINK_CB(skb).pid = nlk->pid; 1239 NETLINK_CB(skb).pid = nlk->pid;
1240 NETLINK_CB(skb).dst_group = dst_group; 1240 NETLINK_CB(skb).dst_group = dst_group;
1241 NETLINK_CB(skb).loginuid = audit_get_loginuid(current->audit_context); 1241 NETLINK_CB(skb).loginuid = audit_get_loginuid(current);
1242 selinux_get_task_sid(current, &(NETLINK_CB(skb).sid)); 1242 selinux_get_task_sid(current, &(NETLINK_CB(skb).sid));
1243 memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred)); 1243 memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
1244 1244
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 3ff76e84d548..7ba65e82941c 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -493,7 +493,7 @@ expired:
493 km_state_expired(x, 1, 0); 493 km_state_expired(x, 1, 0);
494 494
495 xfrm_audit_state_delete(x, err ? 0 : 1, 495 xfrm_audit_state_delete(x, err ? 0 : 1,
496 audit_get_loginuid(current->audit_context), 0); 496 audit_get_loginuid(current), 0);
497 497
498out: 498out:
499 spin_unlock(&x->lock); 499 spin_unlock(&x->lock);
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index a85740530afc..0341567665b3 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -172,9 +172,10 @@ static ssize_t sel_write_enforce(struct file * file, const char __user * buf,
172 if (length) 172 if (length)
173 goto out; 173 goto out;
174 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 174 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
175 "enforcing=%d old_enforcing=%d auid=%u", new_value, 175 "enforcing=%d old_enforcing=%d auid=%u ses=%u",
176 selinux_enforcing, 176 new_value, selinux_enforcing,
177 audit_get_loginuid(current->audit_context)); 177 audit_get_loginuid(current),
178 audit_get_sessionid(current));
178 selinux_enforcing = new_value; 179 selinux_enforcing = new_value;
179 if (selinux_enforcing) 180 if (selinux_enforcing)
180 avc_ss_reset(0); 181 avc_ss_reset(0);
@@ -243,8 +244,9 @@ static ssize_t sel_write_disable(struct file * file, const char __user * buf,
243 if (length < 0) 244 if (length < 0)
244 goto out; 245 goto out;
245 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 246 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
246 "selinux=0 auid=%u", 247 "selinux=0 auid=%u ses=%u",
247 audit_get_loginuid(current->audit_context)); 248 audit_get_loginuid(current),
249 audit_get_sessionid(current));
248 } 250 }
249 251
250 length = count; 252 length = count;
@@ -356,8 +358,9 @@ out1:
356 (security_get_allow_unknown() ? "allow" : "deny"))); 358 (security_get_allow_unknown() ? "allow" : "deny")));
357 359
358 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 360 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
359 "policy loaded auid=%u", 361 "policy loaded auid=%u ses=%u",
360 audit_get_loginuid(current->audit_context)); 362 audit_get_loginuid(current),
363 audit_get_sessionid(current));
361out: 364out:
362 mutex_unlock(&sel_mutex); 365 mutex_unlock(&sel_mutex);
363 vfree(data); 366 vfree(data);
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 880d455aa659..fced6bccee76 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1905,11 +1905,12 @@ int security_set_bools(int len, int *values)
1905 if (!!values[i] != policydb.bool_val_to_struct[i]->state) { 1905 if (!!values[i] != policydb.bool_val_to_struct[i]->state) {
1906 audit_log(current->audit_context, GFP_ATOMIC, 1906 audit_log(current->audit_context, GFP_ATOMIC,
1907 AUDIT_MAC_CONFIG_CHANGE, 1907 AUDIT_MAC_CONFIG_CHANGE,
1908 "bool=%s val=%d old_val=%d auid=%u", 1908 "bool=%s val=%d old_val=%d auid=%u ses=%u",
1909 policydb.p_bool_val_to_name[i], 1909 policydb.p_bool_val_to_name[i],
1910 !!values[i], 1910 !!values[i],
1911 policydb.bool_val_to_struct[i]->state, 1911 policydb.bool_val_to_struct[i]->state,
1912 audit_get_loginuid(current->audit_context)); 1912 audit_get_loginuid(current),
1913 audit_get_sessionid(current));
1913 } 1914 }
1914 if (values[i]) { 1915 if (values[i]) {
1915 policydb.bool_val_to_struct[i]->state = 1; 1916 policydb.bool_val_to_struct[i]->state = 1;
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-09 19:31:59 -0400