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 7172228851F for ; Thu, 24 Sep 2026 00:51:16 +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=1790211077; cv=none; b=SBOaRUHKMWb6Ktwc8LMULa/OUZjcejBw1wnaoscs2zNb4mT8Emu0dJ+gXTmu5abn/EXnpjcGOdi2iOuDzhaGNcYqs/nXbbnFC/5CFnaCVT3nuGjAdWOhwPgxVZgEXSMldKwTdgKyb2HbvrjTT95jsNY+2R6Vz3JWKNo4jMM91Sg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790211077; c=relaxed/simple; bh=4gu4oFpt2ZXr0aI47XgNEuBF23MdZ5nhe130GzLBT9I=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=NFTbRrnxSTsFUwIkKNUxeun62VkRr7nzNob36czdt+hxWA8tc1JaNAV4QGHwlmlScxOWkp8K+Vb18T2hkdaXRAWFx5vEXCoKz7ZyWMcssZVD2Lp0GRo4Q0qODardVAkza5agDJZrbV29mO544M8HsZnt7a3aqrf0rCmj+UvLcmA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k2hZAbB3; 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="k2hZAbB3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F2D421F000FF; Thu, 24 Sep 2026 00:51:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790211076; bh=m4PG4vc/y5GZKlJi93jzUEPxnNBuTZNbeMZnlsrp38M=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=k2hZAbB3ldbRaXHoL9WsqqBG7WglpapK8/skLjgKJQ2l3YfDKTQezmSqp7ZBZI1Oz i2yT0AojnXxO/JtGrm5b7tNpHscqpzzD4/N5xAN3yuh7JzgvBI8og2pEVnnvm2Zhvt u+skpoc6uec0jFzIyZ6kqJKmr6tXmhpjHVCe/losF0Gs0H7Z9QnJfS94cd/turFSYY JN0OJ97cVk+s1sCsX/bKIhtj1K7Kqfsn5koAziCrCQ6fgmelLFajYhiodMTQmVi8Dr gYU7o6vrm9Kd1VmAOdSkIfUqeIzZ0N2sxFc+G582vexH4Pi286ASeH+M9n663wtmu9 6vkgVCNB1Hu/Q== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id D0BD739E9607; Thu, 24 Sep 2026 00:50:06 +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] net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179021100565.1255052.296687664460919785.git-patchwork-notify@kernel.org> Date: Thu, 24 Sep 2026 00:50:05 +0000 References: <20260919133604.50948-1-shlomojune6@gmail.com> In-Reply-To: <20260919133604.50948-1-shlomojune6@gmail.com> To: Shihuang Liu Cc: netdev@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Sat, 19 Sep 2026 21:36:04 +0800 you wrote: > skb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max > argument and passes the result to __pskb_pull_tail() as a signed int. The > function does not ensure that max is at least skb_headlen(skb). > > This can happen while parsing IPv6 extension headers when an skb already > has a linear area larger than MAX_IPV6_HDR_LEN. Once the parser needs data > beyond the linear area, max - skb_headlen(skb) wraps and is converted to a > negative delta. __pskb_pull_tail() then passes that negative length to > skb_copy_bits(), where it can become a very large copy length. > > [...] Here is the summary with links: - [net,v2] net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6() https://git.kernel.org/netdev/net/c/3b4e0b0c008a You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html