From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 9DE5B238D54; Thu, 4 Jun 2026 01:14:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780535660; cv=none; b=PDf49r5HojbgNGvdnvt+w77/BNup5YU6dd8GWazesm8urSmNDqH5c5Ot6NabwYIwXX46rdojnDCTkTQiXLqhzQvigp6PwvPJJ+EF1cHwiJwujhZfYvhVq+pONdwK6er+e+euT1U7vspwyaopJtF6SzgIlsGM1kG9be5jBY2X3lE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780535660; c=relaxed/simple; bh=AvQcOYV3R/7eO2B1DK5jCcSAQMNVBo/2CdInG88GKXg=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=IuIGLjDP8etCik/pihyefICsyCNMIS01xCZr/GymCN+0q7P0GpF/ejlr8ps2SYgNMkXwGkMO8O58Gpsbd5+KhXOr88MWenuCVINTreQsObaqkqvfoeLHCgVMg1g9V3J9+spmZDQ2BqOWHffFSxQe4u4sCSINWC7GimVQVDTPF9o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JC+aiJkS; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JC+aiJkS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A3E91F00893; Thu, 4 Jun 2026 01:14:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780535659; bh=jiIcQ71vfVf+xwbx2q42NM3vgT8HX9pPFNgaMCQ8yjE=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=JC+aiJkSm4WknpDBIG88SMnq0gxDGi+frmllGC7q77KB1eIz6dmV4Wz8kESq37dAl nUpzuaImCJmZ1jztjpzDrWEjzMY2NQVLPYLTYFD7wLNzPGQuTPeILxXsGgFVyvXd0O y2FEom+v9Qr5Linp8F0uJBSiRB8SlFQS2JZm4ZRqzojGLZwzk/xxhwZ44cSXuNsNhV AV6yyXeFTB5K1DShfvZCC9gApjBN3JN0dgdA12EsgLZrdv/NnzEV/Q3HhGhU1Ea+RZ O50MngBYyCS97+wdPLTvlT1nQwSUzex/rZ275jjpsQyEijB7UgH/e5/n7//iUx3XHh 0J8cTKtOyiArQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id D0A5E39308DD; Thu, 4 Jun 2026 01:14:21 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net v5] xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178053566039.2042071.1462371315566294486.git-patchwork-notify@kernel.org> Date: Thu, 04 Jun 2026 01:14:20 +0000 References: <20260530042630.80626-1-kerneljasonxing@gmail.com> In-Reply-To: <20260530042630.80626-1-kerneljasonxing@gmail.com> To: Jason Xing Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, bjorn@kernel.org, magnus.karlsson@intel.com, maciej.fijalkowski@intel.com, jonathan.lemon@gmail.com, sdf@fomichev.me, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, horms@kernel.org, andrew+netdev@lunn.ch, bpf@vger.kernel.org, netdev@vger.kernel.org, kernelxing@tencent.com Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Sat, 30 May 2026 12:26:30 +0800 you wrote: > From: Jason Xing > > The TX metadata area resides in the UMEM buffer which is memory-mapped > and concurrently writable by userspace. In xsk_skb_metadata(), > csum_start and csum_offset are read from shared memory for bounds > validation, then read again for skb assignment. A malicious userspace > application can race to overwrite these values between the two reads, > bypassing the bounds check and causing out-of-bounds memory access > during checksum computation in the transmit path. > > [...] Here is the summary with links: - [net,v5] xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata() https://git.kernel.org/netdev/net/c/22ba97ea9cc1 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html