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 76FAA35C6BE for ; Thu, 10 Sep 2026 10:11:11 +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=1789035075; cv=none; b=EpVP7C3TUvdyZyU+tkZ2gXH18doxBfh0NwNmkIjN7QieuZBnbltkLjkqWTJxh1veUaqyHMYMpkflRhtrSSrpnxDtyqDB5frYKU0kuJ1GC7LYUCP3xT+QTRjORgslDgFm78L0brAV0e4fGtCeSSfOZy358SHIvdmPkTQD4sTF5qg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789035075; c=relaxed/simple; bh=LGA9Q0CNaz1Zj8YaIZTa6YaXFaRGttuRDrwITf+7oY0=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=NL/Jf5Q6MN+EC7V8uxujtbgaNMvdKz6uvtCdKOkGEShAvmTehbrB0pKo47IxJkF0HxujtUl5bw1MMD9qxULtDbKUANObJdZYxq7Yd8SuxRELJo3n9QczCK9G9ycgfJqRL0UHOvVLEMcKoQrQW7lL+SMlipDV5y+BNSmnj0YoCX0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dmbKSSjr; 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="dmbKSSjr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84CCC1F000FF; Thu, 10 Sep 2026 10:11:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789035068; bh=kitfu5LEYnJu7RvhE1IWW2XbP3ZKU/jy9uLq5Ex+piY=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=dmbKSSjrRyrOaZUdjlob6hMav65apj41Mquzr6Y6FBnLNXOknumMwJMouPSBldN/e TlyocYSd7H2U49IJ69mW+tso+TuTzYRUSs4sJjlTaNNp+UsZFcuzxWqqEjwRqIYJ1W JE6KIMH5hPlyCbIZDTgX1ZH9+I1CjhZuDgrTRQe4/Xr66FzjWWuqSgKyvoL19wUMJG 1wk4fnzmuZBIPLD/9ZZRs2p67/6HGqe+gYNlVh5IFmI0xpRTsupn7XrNsT4uEY1xMI M6T5WW4S9TtCdngh5+k5KvUchQNe9PJhzr/Idl6aP3ez5rFtzUCnlXeApi37rml/1x PFc55lLVm8Bbw== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 567EA380CFD6; Thu, 10 Sep 2026 10:10:07 +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 v1 net] net/sched: cls_api: Don't replay RTM_GETCHAIN in tc_ctl_chain(). From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178903500614.1334538.13024696735558909937.git-patchwork-notify@kernel.org> Date: Thu, 10 Sep 2026 10:10:06 +0000 References: <20260908205537.863484-1-kuniyu@google.com> In-Reply-To: <20260908205537.863484-1-kuniyu@google.com> To: Kuniyuki Iwashima Cc: jhs@mojatatu.com, jiri@resnulli.us, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, gustavo@embeddedor.com, kuni1840@gmail.com, netdev@vger.kernel.org, tarasmadan@google.com Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni : On Tue, 8 Sep 2026 20:55:25 +0000 you wrote: > If a netlink socket sends RTM_GETCHAIN requests repeatedly > without recv()ing the responses, tc_ctl_chain() hogs CPU and > triggers Hung Task splat. [0] > > As caught in the stack trace, netlink_attachskb() could confuse > tc_ctl_chain() by returning -EAGAIN when the userspace netlink > socket's receive buffer is full. > > [...] Here is the summary with links: - [v1,net] net/sched: cls_api: Don't replay RTM_GETCHAIN in tc_ctl_chain(). https://git.kernel.org/netdev/net/c/dff39930ad5e You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html