netdev - [RFC PATCH 03/15] l2tp: have l2tp_ip_destroy_sock use ip_flush_pending

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Message-Id: <25737cb5fef11f8da3577589872944001913982c.1721733730.git.jchapman@katalix.com>
Date: Tue, 23 Jul 2024 14:51:31 +0100
From: James Chapman <jchapman@...alix.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	dsahern@...nel.org,
	tparkin@...alix.com
Subject: [RFC PATCH 03/15] l2tp: have l2tp_ip_destroy_sock use ip_flush_pending_frames

Use the recently exported ip_flush_pending_frames instead of a
free-coded version and lock the socket while we call it.
---
 net/l2tp/l2tp_ip.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index 78243f993cda..f21dcbf3efd5 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -236,10 +236,10 @@ static void l2tp_ip_close(struct sock *sk, long timeout)
 static void l2tp_ip_destroy_sock(struct sock *sk)
 {
 	struct l2tp_tunnel *tunnel;
-	struct sk_buff *skb;
 
-	while ((skb = __skb_dequeue_tail(&sk->sk_write_queue)) != NULL)
-		kfree_skb(skb);
+	lock_sock(sk);
+	ip_flush_pending_frames(sk);
+	release_sock(sk);
 
 	tunnel = l2tp_sk_to_tunnel(sk);
 	if (tunnel) {
-- 
2.34.1