Browse files

fs: handle failed audit_log_start properly

audit_log_start() may return NULL, this is unchecked by the caller in
audit_log_link_denied() and could cause a NULL ptr deref.

Introduced by commit a51d9ea ("fs: add link restriction audit reporting").

Signed-off-by: Sasha Levin <>
Signed-off-by: Al Viro <>
  • Loading branch information...
1 parent ffd8d10 commit d1c7d97ad58836affde6e39980b96527510b572e @sashalevin sashalevin committed with Al Viro Oct 4, 2012
Showing with 2 additions and 0 deletions.
  1. +2 −0 kernel/audit.c
@@ -1440,6 +1440,8 @@ void audit_log_link_denied(const char *operation, struct path *link)
ab = audit_log_start(current->audit_context, GFP_KERNEL,
+ if (!ab)
+ return;
audit_log_format(ab, "op=%s action=denied", operation);
audit_log_format(ab, " pid=%d comm=", current->pid);
audit_log_untrustedstring(ab, current->comm);

0 comments on commit d1c7d97

Please sign in to comment.