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

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Date:   Fri,  7 Jun 2019 16:46:07 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, linux-can@...r.kernel.org, mkl@...gutronix.de,
        wg@...ndegger.com, patrick.ohly@...el.com,
        Willem de Bruijn <willemb@...gle.com>,
        syzbot+a90604060cb40f5bdd16@...kaller.appspotmail.com
Subject: [PATCH net] 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>
---
 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 e8fd5dc1780ae..189a6bf8f829c 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)
-- 
2.22.0.rc2.383.gf4fbbf30c2-goog