From faeb18b64b5aa9269e33e3b750801171bc52ea96 Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Wed, 20 Apr 2011 01:57:15 +0000 Subject: [PATCH] can: add missing socket check in can/raw release commit 10022a6c66e199d8f61d9044543f38785713cbbd upstream. v2: added space after 'if' according code style. We can get here with a NULL socket argument passed from userspace, so we need to handle it accordingly. Thanks to Dave Jones pointing at this issue in net/can/bcm.c Signed-off-by: Oliver Hartkopp Signed-off-by: David S. Miller Signed-off-by: Paul Gortmaker --- net/can/raw.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/can/raw.c b/net/can/raw.c index da99cf153b33..9dd45ea45ccb 100644 --- a/net/can/raw.c +++ b/net/can/raw.c @@ -281,7 +281,12 @@ static int raw_init(struct sock *sk) static int raw_release(struct socket *sock) { struct sock *sk = sock->sk; - struct raw_sock *ro = raw_sk(sk); + struct raw_sock *ro; + + if (!sk) + return 0; + + ro = raw_sk(sk); unregister_netdevice_notifier(&ro->notifier); -- 2.39.5