From patchwork Mon Oct 14 14:05:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthieu Baerts X-Patchwork-Id: 13835091 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 A186C1AA793; Mon, 14 Oct 2024 14:06:48 +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=1728914808; cv=none; b=pckAYVHzsFACEOkTRPeKx1PR9FtniZSrJ0bGbyhkdM2chHTRbw6oN+Yq5Kv0DYxY2XgV0pTJP6AK0e7mVzUX0PY+XyB3glwVBaq9iYZXxVjGoFkaPiCPduEQgcCyJHNXlUwel2bp5PW9T0I4rCAKYjEGFqMkdXIMPfj75sY/808= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728914808; c=relaxed/simple; bh=uVnPvJtdREsRxDsoD6i65l7uYJYrToqneYgiuuHqBxw=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=XnFbeZ2lkGspukpPEfLsQRJYl4eispM+fQIK0kDMsE9mSo6xnMCuTbDka/WtNz4AYbml0YZuUqrcpauB82ikq4r6RPT+DqfqrrvtEwJZrBZrkw1pk40xf2UyO2pSfHVlY8PpOLUCT5tZqGLKOMsvqj5I6d7EMWBlBgvx8H0uc6c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=knvcTohY; 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="knvcTohY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A3CAC4CEC3; Mon, 14 Oct 2024 14:06:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728914808; bh=uVnPvJtdREsRxDsoD6i65l7uYJYrToqneYgiuuHqBxw=; h=From:Subject:Date:To:Cc:From; b=knvcTohYL/2WTKs1eK5goDErmbLsXy2dpmydbOjrXPgouZKsa3T6aPfjg0RwZpkrE /bj0d5y2zKSRpJ2TZ+DGIC/rtafu/8iR1d+HHMn7CK/njgu1izbGX6J8kEk4JQiqXZ 6te/4bb17wVgpNsaiM3JR6/Z/9acUafsFBL9cK9IocHM6C6XS2eynKdA1bG/uEwon7 hplFrvItaFCF2+pMrpyXqaYjZn986AplRfGGDykvVkwHSsqJodhCIMIPuwP4fQ95CT dAY/pGJHN4os/rg90BGuGRtxB0Ph/+sdchM4uRGYQizQSqbr0Hek/WG0snRj00EWeI 9elBCu83RPB1Q== From: "Matthieu Baerts (NGI0)" Subject: [PATCH net v2 0/2] mptcp: prevent MPC handshake on port-based signal endpoints Date: Mon, 14 Oct 2024 16:05:59 +0200 Message-Id: <20241014-net-mptcp-mpc-port-endp-v2-0-7faea8e6b6ae@kernel.org> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAEclDWcC/x2MMQqAMAwAvyKZDWgpWPyKOGgbNYM1tEUE6d8NL gc33L2QKTFlGJsXEt2c+Yoqpm3AH0vcCTmog+mM7bveYqSCpxQvSo9ypYIUg6DdnFuDNY78AFp Loo2f/zyBRjDX+gFkVkLqbgAAAA== X-Change-ID: 20241014-net-mptcp-mpc-port-endp-4f88bd428ec7 To: mptcp@lists.linux.dev, Mat Martineau , Geliang Tang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Cong Wang , "Matthieu Baerts (NGI0)" , stable@vger.kernel.org, syzbot+f4aacdfef2c6a6529c3e@syzkaller.appspotmail.com X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1690; i=matttbe@kernel.org; h=from:subject:message-id; bh=uVnPvJtdREsRxDsoD6i65l7uYJYrToqneYgiuuHqBxw=; b=owEBbQKS/ZANAwAIAfa3gk9CaaBzAcsmYgBnDSV0dkZ74ozw3od71dlDMjlg/gknau4oOdylA Wn76OzDwDaJAjMEAAEIAB0WIQToy4X3aHcFem4n93r2t4JPQmmgcwUCZw0ldAAKCRD2t4JPQmmg c32ZEADhguoLx3kQsQYo6PAp16Iw7+42kWy5/VMYtfT6ah8g3P6FBcv+2at45W8JAhsmGaIluud obMgXnqiylarBJjnrpMZiAkurfXXrLXKNjATCtXid/C5SIZN7p3ImvLP4Gu5IlzD0CoaFQnzdc6 9wLqCpaFONoFdA+rZplinoVSlN0EbaixXQENrfrWy5l/HQDKXepvSaYq6m6Z/DJLLyMVNbkcfui ILM9lREBxvzsF5iBS2wzdy5DYMCfkS8l+Ik6phHFMd73k7h8l97kHMfaHkINHf2MXRE6zgX/nIa iiiiGYNEteqNSEwIhyI/RIe0AKTpkNjPJdRwSDh/KSBqzEOGkYGruf4+Jrs82Mjjeu8UR1UMx4M Nz0GRdCPtyVdV1+EyHK1yXeETusqOPC8Lf7osW6GIurhqolQlxR36ejVcT3M7h9ukK+XIBXmf9y o8g5zRbDwVqH/E9qp9aQpoVJqhzmeo5UJJCTR9Q+wq4tiBeuY5Ji+4q6MQPzVrmnlZrf//qp8Db wHI9clmkfuiGfX3/GyEMdjRBIFl32P6/yhWns9MpuERW0FEAnW8QnCroHHoYqHZFhIL6bI/G5oA DJgxAjkByCdanE7kGvczbdB35P73tlzbuSw2+9weXbjOdcqe9ncesW2Xm36zfdiVJrf7cSfG0i3 Nk67piBvBJdebiw== X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 MPTCP connection requests toward a listening socket created by the in-kernel PM for a port based signal endpoint will never be accepted, they need to be explicitly rejected. - Patch 1: Explicitly reject such requests. A fix for >= v5.12. - Patch 2: Cover this case in the MPTCP selftests to avoid regressions. Signed-off-by: Matthieu Baerts (NGI0) --- Changes in v2: - This new version fixes the root cause for the issue Cong Wang sent a patch for a few weeks ago, see the v1, and the explanations below. The new version is very different from the v1, from a different author. Thanks to Cong Wang for the first analysis, and to Paolo for having spot the root cause, and sent a fix for it. - Link to v1: https://lore.kernel.org/r/20240908180620.822579-1-xiyou.wangcong@gmail.com - Link: https://lore.kernel.org/r/a5289a0d-2557-40b8-9575-6f1a0bbf06e4@redhat.com --- Paolo Abeni (2): mptcp: prevent MPC handshake on port-based signal endpoints selftests: mptcp: join: test for prohibited MPC to port-based endp net/mptcp/mib.c | 1 + net/mptcp/mib.h | 1 + net/mptcp/pm_netlink.c | 1 + net/mptcp/protocol.h | 1 + net/mptcp/subflow.c | 11 +++ tools/testing/selftests/net/mptcp/mptcp_join.sh | 117 +++++++++++++++++------- 6 files changed, 101 insertions(+), 31 deletions(-) --- base-commit: 174714f0e505070a16be6fbede30d32b81df789f change-id: 20241014-net-mptcp-mpc-port-endp-4f88bd428ec7 Best regards,