[PATCH 4.9 028/102] can: purge socket error queue on sock destruct

Greg Kroah-Hartman
2019-07-08T15:20:48Z

From: Willem de Bruijn <willemb@google.com>

commit fd704bd5ee749d560e86c4f1fd2ef486d8abf7cf upstream.

CAN supports software tx timestamps as of the below commit. Purge
any queued timestamp packets on socket destroy.

Fixes: 51f31cabe3ce ("ip: support for TX timestamps on UDP and RAW sockets")
Reported-by: syzbot+a90604060cb40f5bdd16@syzkaller.appspotmail.com
Signed-off-by: Willem de Bruijn <willemb@google.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/can/af_can.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -113,6 +113,7 @@ EXPORT_SYMBOL(can_ioctl);
static void can_sock_destruct(struct sock *sk)
{
skb_queue_purge(&sk->sk_receive_queue);
+ skb_queue_purge(&sk->sk_error_queue);
}

static const struct can_proto *can_get_proto(int protocol)