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Mon, 25 May 2026 13:53:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779717204; bh=0qi46Rt48Kr9CUNAuhE8+AogLbpV9sC1dRJVHiMwYPc=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=ZofNUtFm5U/XV4i9kVPHrrDIXF9313RyDI8LJtiwZSy9/VhGCaigGL6511xRPjTtS VbsCFniamG+JHdoMqb3VHy0QF9svac365gfi3bRU804rnpYgUIsCe1aksCmXhsp55X 2ArU1lADUxPY8Ysx16tJ0PzesohFt8ilBMjWcKzs0rHbwZjfHSAtzs5gajQ48yQ9P1 6f836RPtX0W1yiiLlo57ydsr01vaaRXFZHLiFY4+2OyosenF5uFoOswutUbPxqw+vT wDq0yb4p90aVyNabCjOeX0ezVG3PI0np44ocTc6tGPJvCdX+p5El8uP89EkNlzyzcS wkWPXq4ZXBzGQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id D0ECC380AA60; Mon, 25 May 2026 13:53:32 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v2] cgroup/rstat: validate cpu before css_rstat_cpu() access From: patchwork-bot+netdevbpf@kernel.org Message-Id: <177971721165.2579362.15091579325825161865.git-patchwork-notify@kernel.org> Date: Mon, 25 May 2026 13:53:31 +0000 References: <20260516070849.106141-1-a0yami@mailbox.org> In-Reply-To: <20260516070849.106141-1-a0yami@mailbox.org> To: Qing Ming Cc: tj@kernel.org, josef@toxicpanda.com, axboe@kernel.dk, hannes@cmpxchg.org, mkoutny@suse.com, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, akpm@linux-foundation.org, ast@kernel.org, haoluo@google.com, yosry@kernel.org, cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, bpf@vger.kernel.org X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B8524C0007 X-Stat-Signature: 56fd6m6mc3eewy4ot1w5mq95krwbpgph X-HE-Tag: 1779717205-887653 X-HE-Meta: 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 Qobkvszx CdJuxVy17NDJGGmU5WxxJsRZMIsqw+IlUtJBlDVP0/2N54u6g6nvuhpPsoRMDgb+tM9Klm1ycWNINykSnuqJF5SEYxBgDIEjyxASH0u4QAsblmFxSfI3s+UPn3Xw0kwwqZH7V5Ub/EtUvV5rbnSOCiZMk38ufqVcho7av9HiUOb0mbcDB2KXKaQ+AtvSANb9GzqUlzGx7lri9HaUaPtLW2CPZx57UNoilOrk9mINPHLs87cw047lzaSXRi0ow3uWFvNuBHeJGBkdiohZ2R9Lsz3vMjDRr5MeZtA/IAqdFyfOzSXlr8J3Ed1tAQcsSHj8sWQjgAZdAM4VCHDy4xWoU1yLcJxfQC8Zd28Sf4ILjsy1dNV4f3b3MJ5JfynmQfdC9UdQx0vyIUBUGCdyNNz3EAm0PTyCsCXK0lTUgz9p2tF2YMiIKtJbHeQNSyvZJpW32fgAxMp2rPuUYywwZl7EEAMIc/w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello: This patch was applied to bpf/bpf.git (master) by Tejun Heo : On Sat, 16 May 2026 15:08:49 +0800 you wrote: > css_rstat_updated() is exposed as a BPF kfunc and accepts a > caller-provided cpu argument. The function uses cpu for per-cpu rstat > lookups without checking whether it refers to a valid possible CPU. > > A BPF iter/cgroup program with CAP_BPF and CAP_PERFMON can pass an > invalid cpu value. On an unfixed UBSCAN_BOUNDS test kernel, cpu == > 0x7fffffff triggers: > > [...] Here is the summary with links: - [v2] cgroup/rstat: validate cpu before css_rstat_cpu() access https://git.kernel.org/bpf/bpf/c/8817005efbdf You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html