On Mon, 2012-06-11 at 16:41 +0200, Samuel Ortiz wrote:

Hi Sasha,

On Mon, Jun 11, 2012 at 04:00:41PM +0200, Sasha Levin wrote:

quoted

Hi all,

I've stumbled on the following while fuzzing with trinity inside a KVM tools guest, running on 3.5-rc2:

Thanks for the report, it could be worth adding this one to
bugzilla.kernel.org.

What's trinity ?
Also, if this one is reproducible, would you mind sharing some details about
how we could reproduce it ?

Well, bugfix should be trivial enough ;)

diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index ec1134c..208416e 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c

@@ -54,11 +54,12 @@ static int rawsock_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
 
-	pr_debug("sock=%p\n", sock);
-
-	sock_orphan(sk);
-	sock_put(sk);
+	pr_debug("sock=%p sk=%p\n", sock, sk);
 
+	if (sk) {
+		sock_orphan(sk);
+		sock_put(sk);
+	}
 	return 0;
 }