LSM: Check for NULL cred-security on free
authorJames Morris <james.morris@microsoft.com>
Wed, 16 Jan 2019 23:41:11 +0000 (15:41 -0800)
committerJames Morris <james.morris@microsoft.com>
Wed, 16 Jan 2019 23:41:11 +0000 (15:41 -0800)
commita5795fd38ee8194451ba3f281f075301a3696ce2
treee1081bd211b1ea0857073db96b05d65e896012ac
parent9474f4e7cd71a633fa1ef93b7daefd44bbdfd482
LSM: Check for NULL cred-security on free

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
security/security.c