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 79694257845; Thu, 10 Sep 2026 01:51:06 +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=1789005067; cv=none; b=pQmOEi7VcIYPGd7KlLwj9nsO7bgyQcRd+sSVTJsKz6SP4HWS5Afpv4t+mNFxjqMeaHJFIOodQ54dnHF6THIey+4nrn7WdLsS2UcXyQUd9gLkkvlaF9NlCzXkmN/uEQ5Tfo/GedfTlhFnaEsOux+yuwY94X4d5g5qst5o5VMp5lY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789005067; c=relaxed/simple; bh=LcijiIQqU6icGbgqpgAKcDWhpoyzfGooKPh6/Be2dpQ=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=ZvwYNAouVlGpnUiDZtPgRFK8Ak7XyTl/yzKCiO5lH9Z2QRmZBNAERJ8cQmgTdfNRI8ofe0CDHBlSNQgHpnRoA9gR4udzWJsRt8HipZl7+Rmeg2Vwgl1UuyMzwJh2Xu/WkHwoI+E08IT83zmOYQmo8Cwyr9f6NQ8qj3SsGmt7aEY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FSqY6tMO; 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="FSqY6tMO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56D161F000FF; Thu, 10 Sep 2026 01:51:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789005066; bh=O5m7s+46WgS+mOztayFJPrsq1SYgBi//Br3QEwnWZr0=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=FSqY6tMOTwykMsWTp30OCY03lvJBouMd/G/ig/r2BPxLey4g9OnemWEyxUqEv9Zgm ZZbOCbmDqsUuRH6+z8WPhZJkYbrR+fJMx11hhO36vbSUuwPLeNHRd3kCPBTuqAOGQw MrfVj2bMBMwW1+zppaUn10tx4kM5R2C1UVXV7oRliAxd5paQKyvYBDkqPyG6CWvmuH 4yslKinZvwjPDwRU263upnU+d3Sv6m3mxv0tdxuAODVpTSG0w3SGSm0g6ipMK59A+j WSf9D4awEULFnYW5VReIrYKUmB8DgUXUtjeAl7J9JN0yT2332oyAI0U2JrL75YFt1F /7G7Ur0YxboQQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 56B3C380CEC7; Thu, 10 Sep 2026 01:50:05 +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 net] ppp_synctty: ensure a writeable skb header From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178900500414.1147948.3889369400868898311.git-patchwork-notify@kernel.org> Date: Thu, 10 Sep 2026 01:50:04 +0000 References: <20260908072135.877364-1-qingfang.deng@linux.dev> In-Reply-To: <20260908072135.877364-1-qingfang.deng@linux.dev> To: Qingfang Deng Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jirislaby@kernel.org, kees@kernel.org, tparkin@katalix.com, linux-ppp@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Markus.Elfring@web.de Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Tue, 8 Sep 2026 15:21:31 +0800 you wrote: > ppp_sync_txmunge() checks headroom before prepending the address and > control bytes, but does not ensure that the skb header is writable. > A received skb can reach this function through PPP channel bridging > without passing through ppp_start_xmit(), which calls skb_cow_head(). > > For example, a PPPoE frame may share its buffer with a clone queued to > an AF_PACKET socket. If it is bridged to a synchronous tty channel, the > address/control bytes can overwrite data still visible to that socket. > > [...] Here is the summary with links: - [net] ppp_synctty: ensure a writeable skb header https://git.kernel.org/netdev/net/c/8aaeb56aff2a You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html