queue-4.14/can-purge-socket-error-queue-on-sock-destruct.patch

   1 From fd704bd5ee749d560e86c4f1fd2ef486d8abf7cf Mon Sep 17 00:00:00 2001
   2 From: Willem de Bruijn <willemb@google.com>
   3 Date: Fri, 7 Jun 2019 16:46:07 -0400
   4 Subject: can: purge socket error queue on sock destruct
   5
   6 From: Willem de Bruijn <willemb@google.com>
   7
   8 commit fd704bd5ee749d560e86c4f1fd2ef486d8abf7cf upstream.
   9
  10 CAN supports software tx timestamps as of the below commit. Purge
  11 any queued timestamp packets on socket destroy.
  12
  13 Fixes: 51f31cabe3ce ("ip: support for TX timestamps on UDP and RAW sockets")
  14 Reported-by: syzbot+a90604060cb40f5bdd16@syzkaller.appspotmail.com
  15 Signed-off-by: Willem de Bruijn <willemb@google.com>
  16 Cc: linux-stable <stable@vger.kernel.org>
  17 Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19
  20 ---
  21  net/can/af_can.c |    1 +
  22  1 file changed, 1 insertion(+)
  23
  24 --- a/net/can/af_can.c
  25 +++ b/net/can/af_can.c
  26 @@ -105,6 +105,7 @@ EXPORT_SYMBOL(can_ioctl);
  27  static void can_sock_destruct(struct sock *sk)
  28  {
  29         skb_queue_purge(&sk->sk_receive_queue);
  30 +       skb_queue_purge(&sk->sk_error_queue);
  31  }
  32
  33  static const struct can_proto *can_get_proto(int protocol)