From: patchwork-bot+netdevbpf@kernel.org
To: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
davem@davemloft.net, kuba@kernel.org, hawk@kernel.org,
john.fastabend@gmail.com, sdf@fomichev.me, andrii@kernel.org,
martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org,
yonghong.song@linux.dev, kpsingh@kernel.org, haoluo@google.com,
jolsa@kernel.org, bigeasy@linutronix.de, clrkwllms@kernel.org,
rostedt@goodmis.org, tglx@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev
Subject: Re: [PATCH bpf v4 0/2] bpf: cpumap/devmap: fix per-CPU bulk queue races on PREEMPT_RT
Date: Sat, 28 Feb 2026 00:20:09 +0000 [thread overview]
Message-ID: <177223800954.2812023.3473953942632581583.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260225121459.183121-1-jiayuan.chen@linux.dev>
Hello:
This series was applied to bpf/bpf.git (master)
by Alexei Starovoitov <ast@kernel.org>:
On Wed, 25 Feb 2026 20:14:54 +0800 you wrote:
> On PREEMPT_RT kernels, local_bh_disable() only calls migrate_disable()
> (when PREEMPT_RT_NEEDS_BH_LOCK is not set) and does not disable
> preemption. This means CFS scheduling can preempt a task inside the
> per-CPU bulk queue (bq) operations in cpumap and devmap, allowing
> another task on the same CPU to concurrently access the same bq,
> leading to use-after-free, list corruption, and kernel panics.
>
> [...]
Here is the summary with links:
- [bpf,v4,1/2] bpf: cpumap: fix race in bq_flush_to_queue on PREEMPT_RT
https://git.kernel.org/bpf/bpf/c/869c63d5975d
- [bpf,v4,2/2] bpf: devmap: fix race in bq_xmit_all on PREEMPT_RT
https://git.kernel.org/bpf/bpf/c/1872e75375c4
You are awesome, thank you!
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Deet-doot-dot, I am a bot.
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prev parent reply other threads:[~2026-02-28 0:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 12:14 [PATCH bpf v4 0/2] bpf: cpumap/devmap: fix per-CPU bulk queue races on PREEMPT_RT Jiayuan Chen
2026-02-25 12:14 ` [PATCH bpf v4 1/2] bpf: cpumap: fix race in bq_flush_to_queue " Jiayuan Chen
2026-02-25 12:14 ` [PATCH bpf v4 2/2] bpf: devmap: fix race in bq_xmit_all " Jiayuan Chen
2026-02-28 0:20 ` patchwork-bot+netdevbpf [this message]
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