From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B4E7B3B7A1 for ; Mon, 19 Feb 2024 16:05:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708358730; cv=none; b=tovwdwbN+IA41F28NowhIP3Qp5A/4SkYkcctfY1s/P+Eg67MeVxvxeRUp19lK3aZiXMt7QFKFt4imlj0aPauB++xFV7rGrJHBNdJNRE3QsYpmJ+W34flofb5JQEtsoJd+PJREomzSRv8mzVSL276z1+t8yodRfI5bBAt/2gLNLs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708358730; c=relaxed/simple; bh=k4knVFfrs9CBdsrbKYXcCM8f0cQRVgfqMQuTbE2If7Q=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=skYwZMBumUhb7lKE/vIhhOYsosOkA/gRrln9G8tH7vOh/0zF3qf2Krk9XNRV7fRuaGZSB+c8xiAqF/Vb+90ajmsoRgIC4ZSE8toq/XtESUXIU0Lc575WsaMPM2BlM4MQS0kSXBWTHwgGLp3Rse57E7osLkGnRPrpjebCXrmL7eE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MPR1/ZNE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="MPR1/ZNE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 278E8C433F1; Mon, 19 Feb 2024 16:05:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1708358730; bh=k4knVFfrs9CBdsrbKYXcCM8f0cQRVgfqMQuTbE2If7Q=; h=Subject:To:Cc:From:Date:From; b=MPR1/ZNEBU8RaUOeA9YJ61EAOB4qbfhYR7aq/ikOjdOJyFxLI5nYIr94cbM+FN0L9 0MA4d0n3qxOSFbUjUQfsHW9sCPnQNqPlHkPokQeSN6D4oVByfos8CLCy2/IMKMpsbx ksYEjpXsNB1qrwmOgjAmzZq1RLUHxuxToMDX2l/I= Subject: FAILED: patch "[PATCH] mptcp: fix more tx path fields initialization" failed to apply to 6.1-stable tree To: pabeni@redhat.com,davem@davemloft.net,martineau@kernel.org,matttbe@kernel.org Cc: From: Date: Mon, 19 Feb 2024 17:05:11 +0100 Message-ID: <2024021911-fragment-yearly-5b45@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 3f83d8a77eeeb47011b990fd766a421ee64f1d73 # git commit -s git send-email --to '' --in-reply-to '2024021911-fragment-yearly-5b45@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 3f83d8a77eee ("mptcp: fix more tx path fields initialization") 013e3179dbd2 ("mptcp: fix rcv space initialization") c693a8516429 ("mptcp: use mptcp_set_state") 4fd19a307016 ("mptcp: fix inconsistent state on fastopen race") d109a7767273 ("mptcp: fix possible NULL pointer dereference on close") 8005184fd1ca ("mptcp: refactor sndbuf auto-tuning") a5efdbcece83 ("mptcp: fix delegated action races") 27e5ccc2d5a5 ("mptcp: fix dangling connection hang-up") f6909dc1c1f4 ("mptcp: rename timer related helper to less confusing names") 9f1a98813b4b ("mptcp: process pending subflow error on close") d5fbeff1ab81 ("mptcp: move __mptcp_error_report in protocol.c") ebc1e08f01eb ("mptcp: drop last_snd and MPTCP_RESET_SCHEDULER") e263691773cd ("mptcp: Remove unnecessary test for __mptcp_init_sock()") 39880bd808ad ("mptcp: get rid of msk->subflow") 3f326a821b99 ("mptcp: change the mpc check helper to return a sk") 3aa362494170 ("mptcp: avoid ssock usage in mptcp_pm_nl_create_listen_socket()") f0bc514bd5c1 ("mptcp: avoid additional indirection in sockopt") 40f56d0c7043 ("mptcp: avoid additional indirection in mptcp_listen()") 8cf2ebdc0078 ("mptcp: mptcp: avoid additional indirection in mptcp_bind()") ccae357c1c6a ("mptcp: avoid additional __inet_stream_connect() call") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3f83d8a77eeeb47011b990fd766a421ee64f1d73 Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Thu, 8 Feb 2024 19:03:51 +0100 Subject: [PATCH] mptcp: fix more tx path fields initialization The 'msk->write_seq' and 'msk->snd_nxt' are always updated under the msk socket lock, except at MPC handshake completiont time. Builds-up on the previous commit to move such init under the relevant lock. There are no known problems caused by the potential race, the primary goal is consistency. Fixes: 6d0060f600ad ("mptcp: Write MPTCP DSS headers to outgoing data packets") Cc: stable@vger.kernel.org Signed-off-by: Paolo Abeni Reviewed-by: Mat Martineau Signed-off-by: Matthieu Baerts (NGI0) Signed-off-by: David S. Miller diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 7632eafb683b..8cb6a873dae9 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -3478,10 +3478,8 @@ void mptcp_finish_connect(struct sock *ssk) * accessing the field below */ WRITE_ONCE(msk->local_key, subflow->local_key); - WRITE_ONCE(msk->write_seq, subflow->idsn + 1); - WRITE_ONCE(msk->snd_nxt, msk->write_seq); - WRITE_ONCE(msk->snd_una, msk->write_seq); - WRITE_ONCE(msk->wnd_end, msk->snd_nxt + tcp_sk(ssk)->snd_wnd); + WRITE_ONCE(msk->snd_una, subflow->idsn + 1); + WRITE_ONCE(msk->wnd_end, subflow->idsn + 1 + tcp_sk(ssk)->snd_wnd); mptcp_pm_new_connection(msk, ssk, 0); } diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 56b2ac2f2f22..c2df34ebcf28 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -421,12 +421,21 @@ static bool subflow_use_different_dport(struct mptcp_sock *msk, const struct soc void __mptcp_sync_state(struct sock *sk, int state) { + struct mptcp_subflow_context *subflow; struct mptcp_sock *msk = mptcp_sk(sk); + struct sock *ssk = msk->first; - __mptcp_propagate_sndbuf(sk, msk->first); + subflow = mptcp_subflow_ctx(ssk); + __mptcp_propagate_sndbuf(sk, ssk); if (!msk->rcvspace_init) - mptcp_rcv_space_init(msk, msk->first); + mptcp_rcv_space_init(msk, ssk); + if (sk->sk_state == TCP_SYN_SENT) { + /* subflow->idsn is always available is TCP_SYN_SENT state, + * even for the FASTOPEN scenarios + */ + WRITE_ONCE(msk->write_seq, subflow->idsn + 1); + WRITE_ONCE(msk->snd_nxt, msk->write_seq); mptcp_set_state(sk, state); sk->sk_state_change(sk); }