linux-kernel - [PATCH 4.4 22/73] can: purge socket error queue on sock destruct

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Message-Id: <20190708150521.526939612@linuxfoundation.org>
Date:   Mon,  8 Jul 2019 17:12:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        syzbot+a90604060cb40f5bdd16@...kaller.appspotmail.com,
        Willem de Bruijn <willemb@...gle.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 4.4 22/73] can: purge socket error queue on sock destruct

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>
Cc: linux-stable <stable@...r.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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)