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 4AB1B274B26; Tue, 30 Dec 2025 11:23:23 +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=1767093804; cv=none; b=XF1WbcwwCguOo1RmcU0DOoeJUPFsXSkWeA+F1AzY2m46bRPPKThfiPHZVSyD/PfF2FL04KqMVqQttlzUaYysdX8Ecq4PhGAt0SfCdbyKftuBeufHFcA7L1hcWpqDbq0YjTRvCkbgHZnJdB2PrSLD979cX8/fqRZ2LYwwkB2H96c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767093804; c=relaxed/simple; bh=LUbYC9m9QSm0+6NC2jl2C0+EOLgVSDhYN5AzbBac224=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=P1SFYd1seNQeWkYe2vvVz+47PAx4AnS8xDly5wX5jUdbsBZ9emNEJvMOSiDMMIoPB8YKFAAN8tf6CNkfZTJGotuGgg785MOkCVdmc0HIYoDpvPkaoFkoYUUocfH/KQsTiIlO/l2KS21tgjSofw3OAC/9nVVWwaOFLZZ0JgEgCxc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cWGQZAFV; 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="cWGQZAFV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1208C4CEFB; Tue, 30 Dec 2025 11:23:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767093803; bh=LUbYC9m9QSm0+6NC2jl2C0+EOLgVSDhYN5AzbBac224=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=cWGQZAFVLf6Wd414/3//a26yqEjWY+fPQL+ogerptFUa2MWOsyhf8zYGiYF9XeZGU c3JggSxoU9WrXhuFa2MXa/mIi0msDQUIoIwMF5Thb3xsvw18RLfGwa4o+ijuBjp337 H00OESATlnm2sn3ofMCyMv6TolP0+1o+KUbzLn6nVMK0zhNIpPocpGkJwtrhyVTlZn qMIJYbzIsdbb0XSoqRu3Jrm56IGeVVjC+6eYMWS/SnUUytw4YoapQ42zjXqqq68Fiy vqrOIH8H/KzZpFadQNUOZQtYHeGX3oAFMIDRnB8OWax/MKuKS4GnVlxo8LJddDm4pl GCiNZi3eXCjgQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id F2C9A3808205; Tue, 30 Dec 2025 11:20:06 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net v4] ipv6: fix a BUG in rt6_get_pcpu_route() under PREEMPT_RT From: patchwork-bot+netdevbpf@kernel.org Message-Id: <176709360580.3217338.10030913382633316233.git-patchwork-notify@kernel.org> Date: Tue, 30 Dec 2025 11:20:05 +0000 References: <20251223051413.124687-1-jiayuan.chen@linux.dev> In-Reply-To: <20251223051413.124687-1-jiayuan.chen@linux.dev> To: Jiayuan Chen Cc: netdev@vger.kernel.org, syzbot+9b35e9bc0951140d13e6@syzkaller.appspotmail.com, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, bigeasy@linutronix.de, clrkwllms@kernel.org, rostedt@goodmis.org, tglx@linutronix.de, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni : On Tue, 23 Dec 2025 13:14:12 +0800 you wrote: > On PREEMPT_RT kernels, after rt6_get_pcpu_route() returns NULL, the > current task can be preempted. Another task running on the same CPU > may then execute rt6_make_pcpu_route() and successfully install a > pcpu_rt entry. When the first task resumes execution, its cmpxchg() > in rt6_make_pcpu_route() will fail because rt6i_pcpu is no longer > NULL, triggering the BUG_ON(prev). It's easy to reproduce it by adding > mdelay() after rt6_get_pcpu_route(). > > [...] Here is the summary with links: - [net,v4] ipv6: fix a BUG in rt6_get_pcpu_route() under PREEMPT_RT https://git.kernel.org/netdev/net/c/1adaea51c61b You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html