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authorOliver Hartkopp <socketcan@hartkopp.net>2011-04-20 01:57:15 +0000
committerDavid S. Miller <davem@davemloft.net>2011-04-20 12:37:59 -0700
commit10022a6c66e199d8f61d9044543f38785713cbbd (patch)
tree8b934ebc8a5a5277a486413c343afc35a55076bd /net
parent2430af8b7fa37ac0be102c77f9dc6ee669d24ba9 (diff)
can: add missing socket check in can/raw release
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 <socketcan@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/can/raw.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/net/can/raw.c b/net/can/raw.c
index 649acfa7c70a..0eb39a7fdf64 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -305,7 +305,12 @@ 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);

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