From nobody Tue May 5 11:33:51 2026 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 86F9C314D05 for ; Fri, 24 Apr 2026 19:54:45 +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=1777060485; cv=none; b=OMdK9NvMKWMb+2CNO9KbR/odBclsxUnxhx+1Z72ZbHE6Qvn7DLB6nD/AcCFWPC1/l8wITiL6EXFW6GAqvOvzLnRsrILGgzLpfrWq9JvsLofZ02C3ZBiuhvkIvNwhkd/Hsipo64yT68SmvjCz5CeFx9cyWF5P3tgKnYbiTLODFus= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777060485; c=relaxed/simple; bh=6VldtCcU2GhNoc/ooRHqE5DWpkXelAwME68jH1SI9N4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=pyIl/A2VsllNu7lYgD+z5koyALUF0CR4GMCVPqj2jFvizTgUqxTEICwixn233FLE5I8+xOvBh9Njtj7NVvP5lpKDinX7tDsP81+hWJyaUFTgdBD8KwfFOpXJE3nKMLtqzfqQR2/kuJubCF1zzGMc/flVrjHChdwrUTolZi5Nu4o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pGn1lVM5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pGn1lVM5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C9849C19425; Fri, 24 Apr 2026 19:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777060485; bh=6VldtCcU2GhNoc/ooRHqE5DWpkXelAwME68jH1SI9N4=; h=From:Date:Subject:To:Cc:From; b=pGn1lVM5cnh7Mgpb0Py4XMpUgTVxHD8RmzYVOA7RKK9jYGK7GogkD4lO/pJGJB/il 4nHLEYSSzDMTlo7wv+47CNcfoYkD2AYNMAMaT7QDAANb2WsKFYKH+JO/mjo0YzsGI7 g2jkolE0mIbuDPh/+sATmd6k7Zt9iejawUBflQJa3dTCLINJvsX99QxjDS8echlPQR y0Rw73kEnjSZ7L5V5AHdmLDarqYOuADEeEZpEVQ3Aa2kFNqgGR3/MjTJLmOoev5mQm tWwFJp8edRR5zqnaLeNVQsm61/+zgF+Ctb+lvazMunCU7SA66C5Yc7xFWu9SRc5dJV ATbfNe5TVSFAQ== From: "Matthieu Baerts (NGI0)" Date: Fri, 24 Apr 2026 21:54:39 +0200 Subject: [PATCH mptcp-net] mptcp: sockopt: increase seq in mptcp_setsockopt_all_sf Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260424-mptcp-pm-sockopt-set-all-sf-v1-1-38e7023822f8@kernel.org> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yXM0QrCMAyF4VcZuTawhqLMVxEvti7T6NaWJoow9 u5Wd/lzON8KykVY4dysUPgtKinWcIcGwr2PN0YZawO1dGw9eVyyhYx5QU3hmbKhsmE/z6gTjs6 HjjryfHJQhVx4ks9fv8B+jGxw3Sd9DQ8O9tNh2768zVREigAAAA== X-Change-ID: 20260424-mptcp-pm-sockopt-set-all-sf-d14c92924e71 To: MPTCP Upstream Cc: Paolo Abeni , "Matthieu Baerts (NGI0)" X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1080; i=matttbe@kernel.org; h=from:subject:message-id; bh=6VldtCcU2GhNoc/ooRHqE5DWpkXelAwME68jH1SI9N4=; b=owGbwMvMwCVWo/Th0Gd3rumMp9WSGDJfn2p2sH17NnyLx+1D7h2Xdkw9o5SdIn7L4/KRqd+91 1zZ63PyakcpC4MYF4OsmCKLdFtk/sznVbwlXn4WMHNYmUCGMHBxCsBEZN0YGRYWuYSciVNQalE5 PDlbiH+eTeOraUwmhTHXLzu7TtvSuYGR4ZnRKdZ2r9S62Zaa21/u0ZM/q39MV5mr8oHnZec4zel G/AA= X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 mptcp_setsockopt_all_sf() was missing a call to sockopt_seq_inc(). This is required not to cause missing synchronization for newer subflows created later on. This helper is called each time a socket option is set on subflows, and future ones will need to inherit this option after their creation. Fixes: 51c5fd09e1b4 ("mptcp: add TCP_MAXSEG sockopt support") Suggested-by: Paolo Abeni Signed-off-by: Matthieu Baerts (NGI0) Reviewed-by: Mat Martineau --- net/mptcp/sockopt.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c index 79db15903e7a..30b45d2ab38c 100644 --- a/net/mptcp/sockopt.c +++ b/net/mptcp/sockopt.c @@ -812,6 +812,10 @@ static int mptcp_setsockopt_all_sf(struct mptcp_sock *= msk, int level, if (ret) break; } + + if (!ret) + sockopt_seq_inc(msk); + return ret; } =20 --- base-commit: 2b52586ab2905a2e2546a2fcd28448c86677306d change-id: 20260424-mptcp-pm-sockopt-set-all-sf-d14c92924e71 Best regards, -- =20 Matthieu Baerts (NGI0)