From 7ee2492635d862fac39bc5ef234ffd3d8e9f833b Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Fri, 7 Aug 2020 19:03:53 +0200 Subject: [PATCH] mptcp: fix warn at shutdown time for unaccepted msk sockets With commit b93df08ccda3 ("mptcp: explicitly track the fully established status"), the status of unaccepted mptcp closed in mptcp_sock_destruct() changes from TCP_SYN_RECV to TCP_ESTABLISHED. As a result mptcp_sock_destruct() does not perform the proper cleanup and inet_sock_destruct() will later emit a warn. Address the issue updating the condition tested in mptcp_sock_destruct(). Also update the related comment. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/66 Reported-and-tested-by: Christoph Paasch Fixes: b93df08ccda3 ("mptcp: explicitly track the fully established status") Signed-off-by: Paolo Abeni Reviewed-by: Matthieu Baerts Signed-off-by: David S. Miller --- net/mptcp/subflow.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 96f4f2fe50ad..e8cac2655c82 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -423,12 +423,12 @@ static void mptcp_sock_destruct(struct sock *sk) * also remove the mptcp socket, via * sock_put(ctx->conn). * - * Problem is that the mptcp socket will not be in - * SYN_RECV state and doesn't have SOCK_DEAD flag. + * Problem is that the mptcp socket will be in + * ESTABLISHED state and will not have the SOCK_DEAD flag. * Both result in warnings from inet_sock_destruct. */ - if (sk->sk_state == TCP_SYN_RECV) { + if (sk->sk_state == TCP_ESTABLISHED) { sk->sk_state = TCP_CLOSE; WARN_ON_ONCE(sk->sk_socket); sock_orphan(sk); -- GitLab