From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E88FB1DFF0; Tue, 24 Feb 2026 01:40:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771897201; cv=none; b=WjtGSpsrUYrf0w2qS2eA2Uq9gk/NtQhXMFFU27B7fWyxSOKP8RzMyIRYogeSnrx6tbKz088cJiOpax0K6jsgUG0oZYg7jQ7vjXsZ8zz6DlTe4nekOUUEI+gG/fwv8S+YTf8vgpt9wryfHF6jJ/CbElsmKjaFxqs2CvHh+YkD/ms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771897201; c=relaxed/simple; bh=PaaIM9TjlOResMgfmjqmyCxMOqPKh7mT69EdL2KWmao=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=Zz53TWmGQO+7ZvTOuUInRIsZjUM/5bDNgnr5dFGvfDXijkEZ5a0wd0G8KhRat+sbq/LeCXfiRvt0xoxOlaIKc54H2wgKxKkobvqukvk607gYvWLae5Vk0HZkP4jIotI4iEz11QhphZPrjpbDtf12S4ZQNC5dAymH8Xhid2YNNJY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NIAYuTVI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NIAYuTVI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D82DC116C6; Tue, 24 Feb 2026 01:40:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771897200; bh=PaaIM9TjlOResMgfmjqmyCxMOqPKh7mT69EdL2KWmao=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=NIAYuTVI70HxdVJCHRoE8J71g68218YNQa1gzfpFNVf82tl+pqRDeo4+8vLEwGqlz eH2cavfb/SsXn5zTNEcaJ8Our7cQFvdoBKurxyrfYBhO9bgl8Pxhz8rnIwXXA1eVgb NODKLnTMw7T1P5zM9UAtPU9VToZRHOPkrsAFXlCQGJOocPHJ1DuvCA1yXtLd+fnvbN sxhe5/azINOOFC1Nag4c2QQfgIqhrvNl7FzIN/pUwIzOUMpMwRm6uWL4jEZjqdXTDP bqxL+cWdl/Vk4tAfc4/1Vaq6LUmai0feEaFv9kSNwKWrWnIRz6dv3A4CeL+tLVWzCH 3bWZA1ex8ALYQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id B9EDC3808200; Tue, 24 Feb 2026 01:40:07 +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] kcm: fix zero-frag skb in frag_list on partial sendmsg error From: patchwork-bot+netdevbpf@kernel.org Message-Id: <177189720655.3267776.15644480509683053572.git-patchwork-notify@kernel.org> Date: Tue, 24 Feb 2026 01:40:06 +0000 References: <20260219014256.370092-1-jiayuan.chen@linux.dev> In-Reply-To: <20260219014256.370092-1-jiayuan.chen@linux.dev> To: Jiayuan Chen Cc: netdev@vger.kernel.org, pabeni@redhat.com, jiayuan.chen@shopee.com, syzbot+52624bdfbf2746d37d70@syzkaller.appspotmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, horms@kernel.org, mhal@rbox.co, sven@stegemann.de, brauner@kernel.org, tom@herbertland.com, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Thu, 19 Feb 2026 09:42:51 +0800 you wrote: > From: Jiayuan Chen > > Syzkaller reported a warning in kcm_write_msgs() when processing a > message with a zero-fragment skb in the frag_list. > > When kcm_sendmsg() fills MAX_SKB_FRAGS fragments in the current skb, > it allocates a new skb (tskb) and links it into the frag_list before > copying data. If the copy subsequently fails (e.g. -EFAULT from > user memory), tskb remains in the frag_list with zero fragments: > > [...] Here is the summary with links: - [net,v2] kcm: fix zero-frag skb in frag_list on partial sendmsg error https://git.kernel.org/netdev/net/c/ca220141fa8e You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html