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 753D34A3D54 for ; Fri, 4 Sep 2026 13:54:01 +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=1788530042; cv=none; b=SAono++V99OVhidwrQyy29vo1WmxzhFjMgjgFc7HqL/BhBWU6I5bZTCVa5eOSklN+TbM82AELQ93R6QtEYyc16C/C3KBArxFCb3kNFDbt88UKZlkmC6Ws2/nXYGLVbzoVegPxBL5OUTV0VnPv9rMV8I+quJjZgTQK1oou9HgWsc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788530042; c=relaxed/simple; bh=x4P5wWzlkxTMPwe78tzJCgGyXjsrb13rK+Sd5cPnvcQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=SiryMobJMdRRDBjAEH7bVXinBm848uLZ1KAI2Xh70o36RA4wdveBPOZFBGOkYQ7jDKb1CwqyOCUm58F7aK8jGTMKl4nh+z9lmW0LPI/x1+ddQMqtjmPhs/w6nYlI2g8VxcvydOSRgnR+sdVb9KqvdxR4fnwwI/b77cHBinyyRqQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=N1vG3o49; 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="N1vG3o49" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E2941F00A3D; Fri, 4 Sep 2026 13:53:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788530041; bh=ucsri5sJixf4tXz6IXNLl7zIlSCaXEdxrDX4k/1IHSs=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=N1vG3o49TP/NtE32bsvsvToZj31gkeHZjIMvDXXwaLG3kN7D1qG6vqhTfzemDxrlO nCpM8qmWIoS6SdsgCCHy6ZraPVyn1ui0Ysg3mcgd9+ureVZAXtsn1l9yVzFM0Ul860 5fOUFEB5hBe35xJ5mESjL8cQS7r6sHQ4/EL2aqVvISqx62VU3AaZTC180g/myK5AmO XqEQUJzJomPSqUb0AM12TQZCkTTQYHvWjCNvFVImjagu5eo3V1x6nVUijJe6tzfoil JmB9uM5DHVmpffcLF6VXpo7NzRX1fcfj2WGkxRniotN2SXrzUG+MyQJ8D8bf1sLrD7 lphywYoE6Lvpg== Message-ID: <69308cfc-c054-42e8-93a2-acc3ac25bb06@kernel.org> Date: Fri, 4 Sep 2026 15:53:55 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] memory: brcmstb_dpfe: validate firmware section sizes To: Pengpeng Hou , mmayer@broadcom.com Cc: Broadcom internal kernel review list , Florian Fainelli , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260815134559.47888-1-pengpeng@iscas.ac.cn> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 15/08/2026 15:45, Pengpeng Hou wrote: > The firmware header is read before the image has been shown to contain a > complete header. In addition, the final size check adds two > firmware-provided u32 section lengths before comparing the result with > fw->size, so the addition can wrap. > > Reject images shorter than the fixed header and checksum before reading > the header. Then derive the available payload length with subtraction and > require the two declared sections to fill it exactly. > > Fixes: 2f330caff577 ("memory: brcmstb: Add driver for DPFE") > There is no blank line around tags. > Assisted-by: Codex:gpt-5 So if you ask some LLM tools, then ask them how to write correct Linux kernel commit, please. Applied. Best regards, Krzysztof