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 A832A1AAD3 for ; Thu, 4 Apr 2024 02:40:27 +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=1712198427; cv=none; b=JHdH4zHSlI4lhleG+V6cGOZXCluM6qdkljFf8PcVny4hdhkbOm7KiTrJK0mMAu7Efodt91uncLRVxLZQeGOdjkYwpYYpeBv0Uy36JMD1JLdQ6yjPN3fi3aXfevkCUsTwdlMzSas1VM0jWTwN8ii9cLB8/1RfzzrE3WMZY5wfa1c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712198427; c=relaxed/simple; bh=30elOBsXPpptGHsEb+MekkeCeh0L0ZNaUTDOd+0wXFg=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=UAFM+Rs1C4EpxiqtbxWgQ/Ibwd/I5LVP96znvj7HsyDoiAi4tfyHukHuF1NbrnwFteAD/PYW5rABdQcLMHuq95Ba8zGDY95qo4vRAJw0gbZU0Q6F0okey+k3o6S83AW7mmXC9mghl4yA9pvXmAuUXv6b5nr5Nu8meWn6j/WG51I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NTYcTf0O; 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="NTYcTf0O" Received: by smtp.kernel.org (Postfix) with ESMTPS id 4682FC43390; Thu, 4 Apr 2024 02:40:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712198427; bh=30elOBsXPpptGHsEb+MekkeCeh0L0ZNaUTDOd+0wXFg=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=NTYcTf0OwI0n9TgK3AbAWUZpPg8q1iw7yHMdlWGiUIzOUkmMDfI4ES6tEI70R5qrn NplBQHiv9rd/GKC0HHhnwfJHkVqhGzXiyi29QMo8TuS6YSEZ01q68kRjGEqCyxWqtd M5S2YSLQsobiAwFWiVA7P4GHxNI1eaEciCVheGjTOVXKVet0EF0VOuDyDrLCha+wYT JO6mc1t1khcU8yGjzZ0BWLf9Mg44LcMIThfFSYpxhaG4U5ht4BZhpjtyZkptbMFG1P PFoSLLQg+8Ak2ZUkJXTJvXMe1pQDRBDVUplYubfNLeOsfhWF1VekTWtGjhoZTTgsEz U9nvs81TYxX0A== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id 3B30BD84BB4; Thu, 4 Apr 2024 02:40:27 +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] net/sched: fix lockdep splat in qdisc_tree_reduce_backlog() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <171219842723.31127.1396314664737208519.git-patchwork-notify@kernel.org> Date: Thu, 04 Apr 2024 02:40:27 +0000 References: <20240402134133.2352776-1-edumazet@google.com> In-Reply-To: <20240402134133.2352776-1-edumazet@google.com> To: Eric Dumazet Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, netdev@vger.kernel.org, eric.dumazet@gmail.com, syzkaller@googlegroups.com Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Tue, 2 Apr 2024 13:41:33 +0000 you wrote: > qdisc_tree_reduce_backlog() is called with the qdisc lock held, > not RTNL. > > We must use qdisc_lookup_rcu() instead of qdisc_lookup() > > syzbot reported: > > [...] Here is the summary with links: - [net] net/sched: fix lockdep splat in qdisc_tree_reduce_backlog() https://git.kernel.org/netdev/net/c/7eb322360b02 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html