diff mbox series

[net,1/9] mptcp: ensure subflow is unhashed before cleaning the backlog

Message ID 20230704-upstream-net-20230704-misc-fixes-6-5-rc1-v1-1-d7e67c274ca5@tessares.net
State New
Headers
Series mptcp: fixes for v6.5 |

Commit Message

Matthieu Baerts July 4, 2023, 8:44 p.m. UTC 
  From: Paolo Abeni <pabeni@redhat.com>

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 <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
 net/mptcp/protocol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index e892673deb73..489a3defdde5 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);
 }