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 388881CFBA; Mon, 25 May 2026 13:53:24 +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=1779717206; cv=none; b=eRKvU0iasMd2rvVg+paxaq46qOJ3GsmJ1P094N57gODeCZzB08vE5UTMKDgJgs8c/AuUof64GBYEM3W/Rzp61ysj1qw68YswzTbU3jex3YuWDWRVN4OF0yWd8Nz1t4xs3R6fl6bx+Hs+zvvIE6aRiRWWSR992YDZSXJUYwWQMUA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779717206; c=relaxed/simple; bh=bjoUdqXw5ZZA2qoB+sLV+XrCCuZWsgMzhcFViEhm+EY=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=A2DhANjhc9mCYIXyzJ/vg3vtsHwrhdXnVIGTKTpx6Zrdmlfn0BXB1SDS4ci2UW8aJqoXO7QCaJYBilmzcbzlo6LD/tXIgJHOdW5QtTVNDYdI26oOzqvRBSmzKwBDLKK6FH328zOmFZhoC6eKKiSFAdyy4Kxpoq6shXtrJAuyCYk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZofNUtFm; 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="ZofNUtFm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C24481F00A3A; 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" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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