audit: catch possible NULL audit buffers

It's possible for audit_log_start() to return NULL.  Handle it in the
various callers.

Signed-off-by: Kees Cook <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: Jeff Layton <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Julien Tinnes <[email protected]>
Cc: Will Drewry <[email protected]>
Cc: Steve Grubb <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions