tree da065babde441d09db0534491ff28f42cbcf765c
parent eafdb5029c0697e79b852ff3de31b49368d7f20e
author James Morris <james.morris@microsoft.com> 1547682071 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1548227455 +0100

LSM: Check for NULL cred-security on free

commit a5795fd38ee8194451ba3f281f075301a3696ce2 upstream.

From: Casey Schaufler <casey@schaufler-ca.com>

Check that the cred security blob has been set before trying
to clean it up. There is a case during credential initialization
that could result in this.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
Reported-by: syzbot+69ca07954461f189e808@syzkaller.appspotmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>