linux-kernel - [PATCH 3.16 51/87] can: purge socket error queue on sock destruct

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Message-ID: <lsq.1570043211.899264280@decadent.org.uk>
Date:   Wed, 02 Oct 2019 20:06:51 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Willem de Bruijn" <willemb@...gle.com>,
        syzbot+a90604060cb40f5bdd16@...kaller.appspotmail.com,
        "Marc Kleine-Budde" <mkl@...gutronix.de>
Subject: [PATCH 3.16 51/87] can: purge socket error queue on sock destruct

3.16.75-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Willem de Bruijn <willemb@...gle.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@...kaller.appspotmail.com
Signed-off-by: Willem de Bruijn <willemb@...gle.com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/can/af_can.c | 1 +
 1 file changed, 1 insertion(+)

--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -114,6 +114,7 @@ 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)