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 4BDD239CCF7; Wed, 9 Sep 2026 18:41:06 +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=1788979267; cv=none; b=oilqYSkE4xrUiuCV0iGaydHBJ/IND0nUgVj29q8exm1VdZHeGYuw/tWkUdK6byN0Yf3Zdx8dS71KYhcYVBkeA659dWtLBpUn6X5+arB/b42o/xZwfjkCOVjcSK2z3IogNaYvqxAL+AR9oRLK9BjoHme3i0vHRR+kAaI1C8w205w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788979267; c=relaxed/simple; bh=lPbmmiQL1Wm3rLy+SfX3YcgQ6DzZwAIv7N/fsc+XUPs=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=fWglmUZdrPdNNPm3Zp8RA7m9LuV77hO5ljag+KedHa8iMS2ZXG5qQ2F5skcU4zkUk/yrcNTOilEoqIrrYLZbGF1cm4TOq+o7umDpy2zdF8dHbJebaKFzBztBck7+xqu1asU5dQfAuEPhi/+/+eNMfm8Dyv0TEBTzOHyzP9l3SPM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LICO0vvQ; 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="LICO0vvQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD26C1F000FF; Wed, 9 Sep 2026 18:41:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788979265; bh=V8dVU+QStkxPmY4+TTlQDoS1NgA8d65SxXAtC+WMDbQ=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=LICO0vvQ16k1tULzE6km+NUvjuIkZZFgXRUVn+vU1MF/fetG1+uGL7WN1tsA33PCS RtalXEuCCtXOmb6Un8JK+CSovHyYPr4AGWE/Jq25Y51rVskJlWlaRPcVBxJuRiqIWj EdbqxJXk2gORoaf/2HDK4lVI+KUxSlVmAKbXkL+NvqHGD5rXj2fRfBRtxUu2gdWL/q ZAm9X95sw1GqBQo/r0Ayos3PHgLKOT+pLW99j3ENTOiis7LdHVdRDuqfDSvkhtpEEI 1m6y+mvhOXGxBDiiH8pmDV5hJ4hPtyVUZS88YEeU4+waDGBBr2oWH7flV//ZcORmur GdiGX3gyCyGLw== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 1983E380AA52; Wed, 9 Sep 2026 18:40:05 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH bpf v2] bpf: disallow bpf_skb_pull_data() for LWT_SEG6LOCAL From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178897920389.1001427.18181252445473114035.git-patchwork-notify@kernel.org> Date: Wed, 09 Sep 2026 18:40:03 +0000 References: <20260909040807.3885815-2-bestswngs@gmail.com> In-Reply-To: <20260909040807.3885815-2-bestswngs@gmail.com> To: Weiming Shi Cc: daniel@iogearbox.net, john.fastabend@gmail.com, sdf@fomichev.me, martin.lau@linux.dev, ast@kernel.org, andrii@kernel.org, eddyz87@gmail.com, memxor@gmail.com, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, emil@etsalapatis.com, ihor.solodrai@linux.dev, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dlebrun@google.com, m.xhonneux@gmail.com, co+adfca3e91be95776@bugs.sh, xmei5@asu.edu, alexei.starovoitov@gmail.com, stable@vger.kernel.org Hello: This patch was applied to bpf/bpf.git (master) by Daniel Borkmann : On Wed, 9 Sep 2026 12:08:08 +0800 you wrote: > An LWT_SEG6LOCAL program can invalidate its cached SRH with > bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter > may reallocate skb->head, leaving the per-CPU SRH pointer dangling. > Post-program SRH validation then writes through that pointer. > > Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier > rejects this unsafe helper combination. Other LWT program types continue > to expose the helper through lwt_out_func_proto(). > > [...] Here is the summary with links: - [bpf,v2] bpf: disallow bpf_skb_pull_data() for LWT_SEG6LOCAL https://git.kernel.org/bpf/bpf/c/e4a62833adff You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html