From nobody Fri Oct 31 16:39:08 2025 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 76C672BB1D; Sun, 21 Sep 2025 17:26:00 +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=1758475560; cv=none; b=Yx0ztxnDwTP6Fc9oK7XB+cu/uCFBhFwN9n/79S/TU3SMxybiL5WTYNhA4xLf/iwKe+4CKkww55TXXjLGGDIMqGQxwiqk7nihrRgqGratmRF/8dbNEsPZU2bTNCKvR/1QLmU1cIcpEGzQ/fRUt1yTyCwYP4akpp3YytnzrTroQ1w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758475560; c=relaxed/simple; bh=6QnVCx7h0Lh6JASmktnDEvqqeGp7VjpvojZmH6XhdwE=; h=Subject:To:Cc:From:Date:In-Reply-To:Message-ID:MIME-Version: Content-Type; b=tYDrtlbkdtIiNQ37AFd6VhfZ2NBVeQMaiJgimsHrSzR+hSq3NFVnxioiWA22jQYWTMthAj61RLG0CrvUmPrPAh8PlDOUTzA9bPL/FXIE5SuWDBqqYprwyG//5h/tgSY8qVYiUnbDtnoNYo9LfuKzP6ZwFEvrqdHNxDnmb8cVWi4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fRoFQ0LK; 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="fRoFQ0LK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2E72C4CEE7; Sun, 21 Sep 2025 17:25:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1758475560; bh=6QnVCx7h0Lh6JASmktnDEvqqeGp7VjpvojZmH6XhdwE=; h=Subject:To:Cc:From:Date:In-Reply-To:From; b=fRoFQ0LKCCGsLF4AXMS5kzumElsGrOSr3nGZx2wKA6DxCmC2LgXJ3IVaWwq3gPE4l NNkl1QcTrXLKjHI7CGV7pJeSpcN977nxSZ8LrmETgngcNy0pjLrTEq+IKIP2Cp6wdq SJ4Tf8svSgf59rviSaN7yHXyv5SXB0GbBgPodJ/M= Subject: Patch "mptcp: set remote_deny_join_id0 on SYN recv" has been added to the 5.15-stable tree To: gregkh@linuxfoundation.org,kuba@kernel.org,martineau@kernel.org,matttbe@kernel.org,mptcp@lists.linux.dev,sashal@kernel.org Cc: From: Date: Sun, 21 Sep 2025 19:25:55 +0200 In-Reply-To: <20250919231743.3957803-2-matttbe@kernel.org> Message-ID: <2025092155-configure-yapping-1bd8@gregkh> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-stable: commit X-Patchwork-Hint: ignore Content-Type: text/plain; charset="utf-8" This is a note to let you know that I've just added the patch titled mptcp: set remote_deny_join_id0 on SYN recv to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=3Dlinux/kernel/git/stable/stable-queue.git= ;a=3Dsummary The filename of the patch is: mptcp-set-remote_deny_join_id0-on-syn-recv.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. From stable+bounces-180718-greg=3Dkroah.com@vger.kernel.org Sat Sep 20 01:1= 8:05 2025 From: "Matthieu Baerts (NGI0)" Date: Sat, 20 Sep 2025 01:17:44 +0200 Subject: mptcp: set remote_deny_join_id0 on SYN recv To: stable@vger.kernel.org, gregkh@linuxfoundation.org, sashal@kernel.org Cc: MPTCP Upstream , "Matthieu Baerts (NGI0)" , Mat Martineau , Jakub Kicinski Message-ID: <20250919231743.3957803-2-matttbe@kernel.org> From: "Matthieu Baerts (NGI0)" commit 96939cec994070aa5df852c10fad5fc303a97ea3 upstream. When a SYN containing the 'C' flag (deny join id0) was received, this piece of information was not propagated to the path-manager. Even if this flag is mainly set on the server side, a client can also tell the server it cannot try to establish new subflows to the client's initial IP address and port. The server's PM should then record such info when received, and before sending events about the new connection. Fixes: df377be38725 ("mptcp: add deny_join_id0 in mptcp_options_received") Reviewed-by: Mat Martineau Signed-off-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20250912-net-mptcp-pm-uspace-deny_join_id0-v= 1-1-40171884ade8@kernel.org Signed-off-by: Jakub Kicinski [ Conflicts in subflow.c, because of differences in the context, e.g. introduced by commit 3a236aef280e ("mptcp: refactor passive socket initialization"), which is not in this version. The same lines -- using 'mptcp_sk(new_msk)' instead of 'owner' -- can still be added approximately at the same place, before calling mptcp_pm_new_connection(). ] Signed-off-by: Matthieu Baerts (NGI0) Signed-off-by: Greg Kroah-Hartman --- net/mptcp/subflow.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -758,6 +758,9 @@ create_child: */ WRITE_ONCE(mptcp_sk(new_msk)->first, child); =20 + if (mp_opt.deny_join_id0) + WRITE_ONCE(mptcp_sk(new_msk)->pm.remote_deny_join_id0, true); + /* new mpc subflow takes ownership of the newly * created mptcp socket */ Patches currently in stable-queue which might be from matttbe@kernel.org are queue-5.15/mptcp-sockopt-make-sync_socket_options-propagate-sock_keepopen.p= atch queue-5.15/mptcp-set-remote_deny_join_id0-on-syn-recv.patch