3.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sasha Levin <sasha.le...@oracle.com>
commit d1c7d97ad58836affde6e39980b96527510b572e upstream.
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 a51d9eaa ("fs: add link restriction audit reporting").
Signed-off-by: Sasha Levin <sasha.le...@oracle.com>
Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
Cc: Dave Jones <da...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
kernel/audit.c | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1466,6 +1466,8 @@ void audit_log_link_denied(const char *o
ab = audit_log_start(current->audit_context, GFP_KERNEL,
AUDIT_ANOM_LINK);
+ 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);
--
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