AUDIT: Assign serial number to non-syscall messages
Move audit_serial() into audit.c and use it to generate serial numbers
on messages even when there is no audit context from syscall auditing.
This allows us to disambiguate audit records when more than one is
generated in the same millisecond.
Based on a patch by Steve Grubb after he observed the problem.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 4b7caf0..3278ddf 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -219,8 +219,9 @@
/* Private API (for audit.c only) */
extern int audit_receive_filter(int type, int pid, int uid, int seq,
void *data, uid_t loginuid);
-extern int audit_get_stamp(struct audit_context *ctx,
- struct timespec *t, unsigned int *serial);
+extern unsigned int audit_serial(void);
+extern void 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);
extern uid_t audit_get_loginuid(struct audit_context *ctx);
extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
@@ -237,7 +238,7 @@
#define audit_putname(n) do { ; } while (0)
#define audit_inode(n,i) do { ; } while (0)
#define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; })
-#define audit_get_stamp(c,t,s) ({ 0; })
+#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
#define audit_get_loginuid(c) ({ -1; })
#define audit_ipc_perms(q,u,g,m) ({ 0; })
#define audit_socketcall(n,a) ({ 0; })