From: Kuniyuki Iwashima <kuniyu@google.com>
Date: Mon, 20 Oct 2025 15:44:07 +0000 (-0400)
Subject: mptcp: Call dst_release() in mptcp_active_enable().
X-Git-Tag: v6.12.55~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c159590e32346994d6f88eb55f5c4869e486da98;p=thirdparty%2Fkernel%2Fstable.git

mptcp: Call dst_release() in mptcp_active_enable().

[ Upstream commit 108a86c71c93ff28087994e6107bc99ebe336629 ]

mptcp_active_enable() calls sk_dst_get(), which returns dst with its
refcount bumped, but forgot dst_release().

Let's add missing dst_release().

Cc: stable@vger.kernel.org
Fixes: 27069e7cb3d1 ("mptcp: disable active MPTCP in case of blackhole")
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250916214758.650211-7-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 833d4313bc1e ("mptcp: reset blackhole on success with non-loopback ifaces")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c
index dd595d9b5e50c..6a97d11bda7e2 100644
--- a/net/mptcp/ctrl.c
+++ b/net/mptcp/ctrl.c
@@ -385,6 +385,8 @@ void mptcp_active_enable(struct sock *sk)
 
 		if (dst && dst->dev && (dst->dev->flags & IFF_LOOPBACK))
 			atomic_set(&pernet->active_disable_times, 0);
+
+		dst_release(dst);
 	}
 }