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authorAl Viro2008-12-06 01:05:50 -0500
committerAl Viro2008-12-09 02:27:41 -0500
commit48887e63d6e057543067327da6b091297f7fe645 (patch)
treef290af5a887bcf840a63043eb2df3a4c02ccaea3
parent7f0ed77d241b60f70136f15b8eef30a3de1fa249 (diff)
[PATCH] fix broken timestamps in AVC generated by kernel threads
Timestamp in audit_context is valid only if ->in_syscall is set. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--include/linux/audit.h4
-rw-r--r--kernel/audit.c4
-rw-r--r--kernel/auditsc.c5
3 files changed, 7 insertions, 6 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 1b2a6a5c1876..8f0672d13eb1 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -435,7 +435,7 @@ static inline void audit_ptrace(struct task_struct *t)
/* Private API (for audit.c only) */
extern unsigned int audit_serial(void);
-extern void auditsc_get_stamp(struct audit_context *ctx,
+extern int auditsc_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial);
extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
#define audit_get_loginuid(t) ((t)->loginuid)
@@ -518,7 +518,7 @@ extern int audit_signals;
#define audit_inode(n,d) do { ; } while (0)
#define audit_inode_child(d,i,p) do { ; } while (0)
#define audit_core_dumps(i) do { ; } while (0)
-#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
+#define auditsc_get_stamp(c,t,s) (0)
#define audit_get_loginuid(t) (-1)
#define audit_get_sessionid(t) (-1)
#define audit_log_task_context(b) do { ; } while (0)
diff --git a/kernel/audit.c b/kernel/audit.c
index d8646c23b427..ce6d8ea3131e 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1121,9 +1121,7 @@ unsigned int audit_serial(void)
static inline void audit_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial)
{
- if (ctx)
- auditsc_get_stamp(ctx, t, serial);
- else {
+ if (!ctx || !auditsc_get_stamp(ctx, t, serial)) {
*t = CURRENT_TIME;
*serial = audit_serial();
}
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 0a13d6895494..2a3f0afc4d2a 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1957,15 +1957,18 @@ EXPORT_SYMBOL_GPL(__audit_inode_child);
*
* Also sets the context as auditable.
*/
-void auditsc_get_stamp(struct audit_context *ctx,
+int auditsc_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial)
{
+ if (!ctx->in_syscall)
+ return 0;
if (!ctx->serial)
ctx->serial = audit_serial();
t->tv_sec = ctx->ctime.tv_sec;
t->tv_nsec = ctx->ctime.tv_nsec;
*serial = ctx->serial;
ctx->auditable = 1;
+ return 1;
}
/* global counter which is incremented every time something logs in */