diff options
| author | Sasha Levin <sasha.levin@oracle.com> | 2012-10-04 19:57:31 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:32:42 -0700 |
| commit | 724373bd489eb02e1999e2714fcc00658e081a9b (patch) | |
| tree | a7523b88aba9bf57b4d5038402935ca75ae8b67e | |
| parent | 47b401b98b81ae1495a84f00f1d6b88316310da9 (diff) | |
fs: handle failed audit_log_start properly
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.levin@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/audit.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index ea3b7b6191c7..a8c84be9b9ea 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1466,6 +1466,8 @@ void audit_log_link_denied(const char *operation, struct path *link) 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); |