[PATCH v2 net-next 6/7] mptcp: Call dst_release() in mptcp_active_enable().

[Kuniyuki Iwashima <kuniyu@google.com>]

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

Let's add missing dst_release().

Fixes: 27069e7cb3d1 ("mptcp: disable active MPTCP in case of blackhole")
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
---
v2: split from the next patch as dst_dev_rcu() patch hasn't been
    backported to 6.12+, where the cited commit exists.

Cc: Matthieu Baerts <matttbe@kernel.org>
Cc: Mat Martineau <martineau@kernel.org>
Cc: Geliang Tang <geliang@kernel.org>
---
 net/mptcp/ctrl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c
index fed40dae5583..c0e516872b4b 100644
--- a/net/mptcp/ctrl.c
+++ b/net/mptcp/ctrl.c
@@ -505,6 +505,8 @@ 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);
 	}
 }
 
-- 
2.51.0.384.g4c02a37b29-goog