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 7CEC1255F2C for ; Sat, 13 Jun 2026 01:00:16 +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=1781312417; cv=none; b=LY/7AeGPv9jhLbghv4ubc50oYdz56vLwCK2wZ1xdh9R0NE6SOA3kNSyEeuMupc+FK3Q9N/aULFxYHPEF47rLLtAkpkqxkwVaGvgNlqvt7COb7ZvMZj5Nr2wg45tP0KNNbLl8M63rGRc3PnJ/Uin8dkD+BRhWq4Oq5HJKYXxQdAU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781312417; c=relaxed/simple; bh=0h2brqm6UcFB9+XNfUP9L6t59QecqykUNMjttWTLIVY=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=nrv5+vgbeiY87zKhTC6NHb287Rd38Lv5IpKXE/4IBqJNTW+MM6kHKzS8Pi7UTL09qol0Z16x2dE6LWVgBWTwwayyPX6D7esxGk0iUyhbTxjemisiYTThx6UEPgwdaih97Fevg6jlRd8W/R6fzEFh7t1b87aEZEaK2+MuuE+FIRg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BcC7pzAm; 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="BcC7pzAm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 463A61F000E9; Sat, 13 Jun 2026 01:00:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781312416; bh=XTUM/NEUK8egCcyma1exCBdUidBx+9eNNS0ckpQbU04=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=BcC7pzAmp81W6ZtxQdpXUrZG4zFHp1K1snLukH8fdMbeQ32wu5ByxhVR3k9lNtwW0 IFPbEGoxNYcUSJnb52UMG2MoTGOMbAx73ZAjRZsB9wBYc9v9QnlAIVBpebq2PvbhIh oF5tT/Hi/KUupnY2j6h5/PRD6oIjoHu75wtHRo8i5IN4OzXI7yk9qPk/QnHCoGcBfT YRLlaIE1QCYROxMEgbTkBmbS2nujLZmjcIaaw/O2rTz9uilMoQkvLyNPKxVHZRbz5V aLXF8YmE8I8ENwPchdpnbNkL8PTFZVlptkNXJLOJRIpukzwAo90T9RdTJhryy5QToM 3kdL6RaChooHg== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 19B7739E9607; Sat, 13 Jun 2026 01:00:14 +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 v3 net] net: watchdog: fix refcount tracking races From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178131241264.1315131.11092895992307738677.git-patchwork-notify@kernel.org> Date: Sat, 13 Jun 2026 01:00:12 +0000 References: <20260611152737.2580480-1-edumazet@google.com> In-Reply-To: <20260611152737.2580480-1-edumazet@google.com> To: Eric Dumazet Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, eric.dumazet@gmail.com, syzbot+381d82bbf0253710b35d@syzkaller.appspotmail.com, syzbot+3479efbc2821cb2a79f2@syzkaller.appspotmail.com Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Thu, 11 Jun 2026 15:27:37 +0000 you wrote: > Blamed commit converted the untracked dev_hold()/dev_put() calls > in the watchdog code to use the tracked dev_hold_track()/dev_put_track() > (which were later renamed/interfaced to netdev_hold() and netdev_put()). > > By introducing dev->watchdog_dev_tracker to store the > reference tracking information without adding synchronization > between netdev_watchdog_up() and dev_watchdog(), it enabled the > race condition where this pointer could be overwritten or freed > concurrently, leading to the list corruption crash syzbot reported: > > [...] Here is the summary with links: - [v3,net] net: watchdog: fix refcount tracking races https://git.kernel.org/netdev/net/c/8eed5519e496 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html