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 71DFD38B7CD; Fri, 17 Jul 2026 09:30:48 +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=1784280649; cv=none; b=MrQ4IjOgcMqlT4rMMoxRA9lVxAavyMwfu2iAll7721kNT/Z5gZfEqqXM6aa2+2I8W5vsccuKjDfwd9T3GoQSwW1IliA/y+pzINNUpjVUIhOqYDn1tGKjii+rIS/C+rdfTEXPqf6QLluguVfakF5+PXEWD6i/xGnONGYwrIiQBGA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784280649; c=relaxed/simple; bh=LTfis0P9Tjh3Sq0uHdHrE/HDHAeBCvj+ck95VYlkdr8=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=kZ97fVbQkd/8/qJR0yB7rnRHzV5jz0DClq8bh69wnSO0O90QIG0g6Q2V0ecnXTJD8ZA8A2wEW4lAj4/jBc7O34UWlbYK35b2X3l58Qu45+beN9PJ1mg7hkpuP7mXbhgTM7CTh2t2xTKFKWAEsOjYOQDYAdj9eYFJ4GCZWk94LEQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IoJWwF/T; 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="IoJWwF/T" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F0201F000E9; Fri, 17 Jul 2026 09:30:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784280648; bh=rrjAt+mqJyXht3YkeIUSKlfLdN7tV57fGnjBQweeI2s=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=IoJWwF/TakHgCVMJ4wgKIBzAwZTZqYqH4PmQpVhGqH/gy3tfNvwu09El53Iqh3Yix 0CdBmqu9mKZrwEDBiJBEBcUarqb3De1c/k1gbG+reh2JSYSCcO316PGOnkZDGKzdzf 59mHEefXaALRaOBTma8DJuEFcXldeKBmHEAxeexncGv2MSoM+sFaRmSRyHv0DvkxBf S8kVoLD3jwpQkcIC6iq4iFG47x/pXk9+TQqQSyo32rZUAmLw19F0ZC2hOkSbdf+hoA gew8siECaEEZyK84wLKSS6+DV7br22aKzOfhprqbHtA+OrchLEifyGE5qs3vpEBln+ hIwMCn9zBMfBQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id D0AFD380CECB; Fri, 17 Jul 2026 09:30:21 +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 v2] netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178428062039.1629459.13884661779658257379.git-patchwork-notify@kernel.org> Date: Fri, 17 Jul 2026 09:30:20 +0000 References: <20260708181150.3944015-1-xmei5@asu.edu> In-Reply-To: <20260708181150.3944015-1-xmei5@asu.edu> To: Xiang Mei Cc: fw@strlen.de, pablo@netfilter.org, phil@nwl.cc, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, AutonomousCodeSecurity@microsoft.com, tgopinath@linux.microsoft.com, kys@microsoft.com, stable@vger.kernel.org Hello: This patch was applied to netdev/net.git (main) by Florian Westphal : On Wed, 8 Jul 2026 18:11:50 +0000 you wrote: > br_ip6_fragment() gets prevhdr, a pointer into the skb head, from > ip6_find_1stfragopt(), then calls skb_checksum_help(). For a cloned skb > skb_checksum_help() reallocates the head via pskb_expand_head(), leaving > prevhdr dangling. It is later dereferenced in ip6_frag_next(), causing a > use-after-free write. > > Save prevhdr's offset before skb_checksum_help() and recompute it after, > like commit ef0efcd3bd3f ("ipv6: Fix dangling pointer when ipv6 > fragment"). > > [...] Here is the summary with links: - [net,v2] netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment() https://git.kernel.org/netdev/net/c/86f3ce81dd2b You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html