netdev - [PATCH 9/9] can: purge socket error queue on sock destruct

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Message-Id: <20190607211541.16095-10-mkl@pengutronix.de>
Date:   Fri,  7 Jun 2019 23:15:41 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, linux-can@...r.kernel.org,
        kernel@...gutronix.de, Willem de Bruijn <willemb@...gle.com>,
        syzbot+a90604060cb40f5bdd16@...kaller.appspotmail.com,
        linux-stable <stable@...r.kernel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 9/9] can: purge socket error queue on sock destruct

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

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@...kaller.appspotmail.com
Signed-off-by: Willem de Bruijn <willemb@...gle.com>
Cc: linux-stable <stable@...r.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 net/can/af_can.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 743470680127..80281ef2ccbd 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -99,6 +99,7 @@ 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)
-- 
2.20.1