From 3fffa15bfef48b0ad6424779c03e68ae8ace5acb Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Tue, 4 Jul 2023 22:44:33 +0200 Subject: [PATCH] mptcp: ensure subflow is unhashed before cleaning the backlog While tacking care of the mptcp-level listener I unintentionally moved the subflow level unhash after the subflow listener backlog cleanup. That could cause some nasty race and makes the code harder to read. Address the issue restoring the proper order of operations. Fixes: 57fc0f1ceaa4 ("mptcp: ensure listener is unhashed before updating the sk status") Cc: stable@vger.kernel.org Signed-off-by: Paolo Abeni Reviewed-by: Matthieu Baerts Signed-off-by: Matthieu Baerts Signed-off-by: David S. Miller --- net/mptcp/protocol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index e892673deb73b..489a3defdde5c 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2909,10 +2909,10 @@ static void mptcp_check_listen_stop(struct sock *sk) return; lock_sock_nested(ssk, SINGLE_DEPTH_NESTING); + tcp_set_state(ssk, TCP_CLOSE); mptcp_subflow_queue_clean(sk, ssk); inet_csk_listen_stop(ssk); mptcp_event_pm_listener(ssk, MPTCP_EVENT_LISTENER_CLOSED); - tcp_set_state(ssk, TCP_CLOSE); release_sock(ssk); }