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 4FBF650C28C; Fri, 25 Sep 2026 23:41:16 +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=1790379678; cv=none; b=ZHz5FEdUSxzX8KkEttK2PgJXJqqItysdzvD+EHQ4kkfwR+tYWELPM7ICvcb3SXpFAuV083CE1F+FjMc00kB4qjG1wTpiRgkoh5AnJ2U5n7p5DZWY+S4Ue5kseT+kphfR+uFWPoGzVXaVvz8zhuhP98tKDGCf/ZiCID7f1ZTbVqM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790379678; c=relaxed/simple; bh=6CdhQVFmF/dZ4Ucu1U6vxKEJWpmsCASOOZKzUt4Ye/o=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=FDZUFUEiaGoG8U1WHPFP3O3++MlJ4XmZh7/H0XJlFyUNUMuooyo9AhG2yD5hUwdWRHz/5mvuyLy9ez3xOc6k9hSV8p5UQy/IPe0UpAi00VbQPEqB06toGxMY5KkzjNkAsKBv4Z3lBdKGA2eoT2SXcVDib69P2SGrQ/XFTaaZnJ4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nxhb9QCS; 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="nxhb9QCS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C62071F000FF; Fri, 25 Sep 2026 23:41:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790379676; bh=7fSKzAttTvMTl4wo0UZcF+j/vO3XY9jR+4L6IHE53m0=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=nxhb9QCShq8RFATeNl5t+wfq0fgDaegHpUjrgtZntZ/O/OMEgn1cixfV+xDgjbqBw rXbDhEssZpYn0D8iN8Lyn+2TDOCBG035ySyZvLdR9v80l5+naQw8rR/ZWDg+JkbjUa rG8Rx5SheAUSzdkEnqGhIZUYKdP3nml68U7Ln3iDjRuGrD3FcdocJjE7oX1yx5vnz3 1M/MW/PKUsaD0X38YeyCIfTXKkihdZGUHOr4CyZKvKjMQSffOA6r0c+7LIx2+/0H7Y syig3PqPPcnNBdp5F8Lfq7nmZF+rTy8iSOGHJA2cvRfJtWAKoevCsO4vmw0JsBq5pn xpbFKqSMvN5cA== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 938F23809A04; Fri, 25 Sep 2026 23:40:05 +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 net v2] net/mctp: publish the mctp_dev only after it is initialised From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179037960440.3207107.1869825882080445252.git-patchwork-notify@kernel.org> Date: Fri, 25 Sep 2026 23:40:04 +0000 References: <729830b8.130.1a0c945579d.Coremail.18983559317@163.com> In-Reply-To: <729830b8.130.1a0c945579d.Coremail.18983559317@163.com> To: Binbin Deng <18983559317@163.com> Cc: jk@codeconstruct.com.au, matt@codeconstruct.com.au, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dengbinbin21@nudt.edu.cn Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Tue, 22 Sep 2026 21:19:19 +0800 (CST) you wrote: > From: Binbin Deng <18983559317@163.com> > > mctp_add_dev() links the new mctp_dev into dev->mctp_ptr before mdev->dev > is assigned, so a reader that picks the device up in that window > dereferences a net_device pointer that is still NULL: > > KASAN: null-ptr-deref in range [0x00000000000000b0-0x00000000000000b7] > Call Trace: > > ? __pfx_mctp_sendmsg (./include/linux/sockptr.h:49) > ? __pfx_mctp_dst_output (net/mctp/route.c:41) > ? selinux_socket_sendmsg (security/selinux/hooks.c:5278) > ____sys_sendmsg (net/socket.c:775 (discriminator 1) net/socket.c:790 > (discriminator 1) net/socket.c:2684 (discriminator 1)) > ? __pfx_____sys_sendmsg (net/socket.c:1131) > ? __pfx_copy_msghdr_from_user (net/socket.c:2590) > ? update_cfs_rq_load_avg (kernel/sched/fair.c:5478) > ___sys_sendmsg (net/socket.c:2738) > ? __pfx____sys_sendmsg (net/socket.c:2625) > ? perf_event_task_tick (./include/linux/rcupdate.h:838) > ? sched_tick (kernel/sched/core.c:5818) > ? clockevents_program_event (kernel/time/clockevents.c:372) > ? fdget (./include/linux/rcupdate.h:873 fs/file.c:1100) > __sys_sendmsg (net/socket.c:2770) > ? __pfx___sys_sendmsg (net/socket.c:2751) > do_syscall_64 (arch/x86/entry/syscall_64.c:63) > entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) > > > [...] Here is the summary with links: - [net,v2] net/mctp: publish the mctp_dev only after it is initialised https://git.kernel.org/netdev/net/c/aadf655e8ea9 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html