From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f98.google.com (mail-pj1-f98.google.com [209.85.216.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D18073955CA for ; Wed, 26 Aug 2026 23:07:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.98 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787785642; cv=none; b=PVtuHRPfBToFfmkJZXdeEZcaEERbO+gTr+vufB+bIDMru5pSFcMtzj5OXOAyyfe3YiBzZhXYl98J9r5TjrMC6VmC812bSDgo55jfzl5xM/+jwcw2/D/oaoo+oCK8mGzhUlCmmJmkk1Z+b8hKXuvrYT1gnAvMSP1+G3e/qFSIX8E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787785642; c=relaxed/simple; bh=MwjEzSqLh7q5IHjLoAKUjHJweEm0MW6iCRPkIfebgvs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=VeVbSEFqSvyY1ZPPrlj1DvCrOZmNpKsGM+pHnSFXJ917tUfmguHU39IPHqbucnTFh0JRuB50gf6XyM8VrVaTn6NCaeTN7fSnG5KqnptVj+N/VfFDJaPrCX0SM59HWsd0DUYz7vj8e1te65MWW9wcTDtN2q9SBID5L1InOabjWOY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=QYQf0Nnp; arc=none smtp.client-ip=209.85.216.98 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="QYQf0Nnp" Received: by mail-pj1-f98.google.com with SMTP id 98e67ed59e1d1-3965d3d9ab8so1562534a91.3 for ; Wed, 26 Aug 2026 16:07:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787785640; x=1788390440; h=content-transfer-encoding:content-type:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:dkim-signature:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to:content-type; bh=w+Ksm9mowr5e76oy9bv/8McEmzTkr4pMHatHJvGkvcI=; b=QNGid5mALnkD17yu8sllznbA8kyAiQbDczS0Fnyf8ACKWZzzeR2zINJ7UQT50VsR1i qVaAauXBmdkegIPEDqAcfEeQnXyWyGwZgAnHZ1uFKtXNnemCrzhy7Rnsgq+6CbEFsYP3 qO9NQEobpnvx9IpBHA/1LAoa9LbVyhkLW/O5OZQpmpD8IdKkHdfl91m2PzfbsZURMnjk bR9Lqoo0KUYBHxny8FH/X8JbyIKYD3DP4HOH9luHwpoS3oNkZcpgdhQZc/ZBHkr4Fx8v TEw65V+Y636WaDjjCXhSCA1GIyi8HO/bx5IinBFMIuEw7skeNIP+knN+UZ8xwb5EF18d jPrw== X-Forwarded-Encrypted: i=1; AHgh+Rp+p/5DE9FZpQbnU7wJXYekLBlWv68khnbHLb1Cu2kYmK58V4cOUrshTll0oQ+W7iYyMCSgkoN+UNgtghg=@vger.kernel.org X-Gm-Message-State: AFuF++nEDQqQES0GJPmdLGIeMg6Blbyk5R44+CZCPHbPq8Ge2QMZXAWD OxYqdPqwNOLr+tuHGOOVTUk63N5AfMkLZ5rQp5bMGJGtuhGv9CJGFpkpWX6L2HtT98mJT/b0gR/ Fdfhmn/P+33KSyf6HwhAV6VXXSQ4GmxAb3KhLgxl8mtdXQx2qcTvKELQ23n3vUShR+Cd4h+bTvr Lgv/dcjqICTi+JhfWRdfEiTgqNU555p8pBxNJmxbHX+/kWP6eYQ4IDS5pLEZe2gMvR3Q4dssPhK fLVu/Cd0X+zliIIe0apUCBl X-Gm-Gg: AR+sD11rVSUsW5N+2R1cf3eSs4h2cg/1YVT2ACwntYAfTg9UWTXwP8SWjGPmPBQqAI8 CqxobQMODaWjLGFzzQbMUZZuCyfBN2672zVXV8ZhSTRBgui5lvQH1ocRyzSWjFaI6+YjlRaXk7+ +F90Rm5ioQuXUfHvhG5WoBikKEBS7hEceLoeSXHL3Wk70exBjNJBncYMFEe+0qLHbWgobebp/ww S9E9/9s29M6tfIb5ikoo6AnF1glcIqiVQ9MuwSvBoy1KRzxN9GxWSo1OVCLPzPkxghMnckZS7Bq QM0WmCamfGxhX4ONHe2e98/+usgYCQj3DxzBshVgGUsam4WUL8+ViJyKw8PVAsTZL4h3h59nk6A +EPWFG3aapI+C+iFhPK75Xs2gcj5BJwgzhc+MAoCCYjLCf2LlnqUptk4oG49IEtCKWrPbzH1A+E jQJj95vV2H//Xh+dGWMChCEWnPW7DvjloKgpZ4UvXIdm8= X-Received: by 2002:a17:90b:524a:b0:380:540:d499 with SMTP id 98e67ed59e1d1-3966d1ba7bbmr22471561a91.6.1787785639942; Wed, 26 Aug 2026 16:07:19 -0700 (PDT) Received: from smtp-us-east1-p01-i01-si01.dlp.protect.broadcom.com (address-144-49-247-121.dlp.protect.broadcom.com. [144.49.247.121]) by smtp-relay.gmail.com with ESMTPS id 98e67ed59e1d1-39670936531sm524556a91.1.2026.08.26.16.07.19 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Aug 2026 16:07:19 -0700 (PDT) X-Relaying-Domain: broadcom.com X-CFilter-Loop: Reflected Received: by mail-pj1-f70.google.com with SMTP id 98e67ed59e1d1-38e25e4b41cso2836494a91.0 for ; Wed, 26 Aug 2026 16:07:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1787785638; x=1788390438; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=w+Ksm9mowr5e76oy9bv/8McEmzTkr4pMHatHJvGkvcI=; b=QYQf0Nnp5eGKf+gRS5jK9yRXQMVh5KP3nIBm/RwBMR95ycu2+bcr+yQ4hifcK0IN7Y s+XQuphPodkqfogInUYh8gY9vcI9zbXVXt54DSv3BwuOwtThwgFr6KLbI/Rw0tFjKUfQ qDn1v/BsmHiocTzcoGHl14l6Gnye8EESSmc0c= X-Forwarded-Encrypted: i=1; AHgh+RqnvhM4GFY8GLv2A5rjFELe1IJeyQv6un3Ydhcr8o1CAN6lFvYndRRmA/3CGmBI0vQnFOo/EK3nhKlZU6U=@vger.kernel.org X-Received: by 2002:a17:90a:dfd0:b0:38f:bbc:6a0f with SMTP id 98e67ed59e1d1-3966d144247mr22371183a91.1.1787785638357; Wed, 26 Aug 2026 16:07:18 -0700 (PDT) X-Received: by 2002:a17:90a:dfd0:b0:38f:bbc:6a0f with SMTP id 98e67ed59e1d1-3966d144247mr22371084a91.1.1787785637871; Wed, 26 Aug 2026 16:07:17 -0700 (PDT) Received: from [10.67.48.245] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3283d769d81sm12061409eec.13.2026.08.26.16.07.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 Aug 2026 16:07:17 -0700 (PDT) Message-ID: <3e5ec697-8f8b-426d-ac11-4c851aa5204a@broadcom.com> Date: Wed, 26 Aug 2026 16:07:16 -0700 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 2/2] memory: brcmstb_dpfe: Bounds check DCPU-supplied MSG_ARG_COUNT To: Danesh Petigara , mmayer@broadcom.com, krzk@kernel.org Cc: bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Justin Chen , stable@vger.kernel.org References: <20260826201500.3000125-1-danesh.petigara@broadcom.com> <20260826201500.3000125-3-danesh.petigara@broadcom.com> Content-Language: en-US, fr-FR From: Florian Fainelli Autocrypt: addr=florian.fainelli@broadcom.com; keydata= xsBNBFPAG8ABCAC3EO02urEwipgbUNJ1r6oI2Vr/+uE389lSEShN2PmL3MVnzhViSAtrYxeT M0Txqn1tOWoIc4QUl6Ggqf5KP6FoRkCrgMMTnUAINsINYXK+3OLe7HjP10h2jDRX4Ajs4Ghs JrZOBru6rH0YrgAhr6O5gG7NE1jhly+EsOa2MpwOiXO4DE/YKZGuVe6Bh87WqmILs9KvnNrQ PcycQnYKTVpqE95d4M824M5cuRB6D1GrYovCsjA9uxo22kPdOoQRAu5gBBn3AdtALFyQj9DQ KQuc39/i/Kt6XLZ/RsBc6qLs+p+JnEuPJngTSfWvzGjpx0nkwCMi4yBb+xk7Hki4kEslABEB AAHNMEZsb3JpYW4gRmFpbmVsbGkgPGZsb3JpYW4uZmFpbmVsbGlAYnJvYWRjb20uY29tPsLB IQQQAQgAywUCZWl41AUJI+Jo+hcKAAG/SMv+fS3xUQWa0NryPuoRGjsA3SAUAAAAAAAWAAFr ZXktdXNhZ2UtbWFza0BwZ3AuY29tjDAUgAAAAAAgAAdwcmVmZXJyZWQtZW1haWwtZW5jb2Rp bmdAcGdwLmNvbXBncG1pbWUICwkIBwMCAQoFF4AAAAAZGGxkYXA6Ly9rZXlzLmJyb2FkY29t Lm5ldAUbAwAAAAMWAgEFHgEAAAAEFQgJChYhBNXZKpfnkVze1+R8aIExtcQpvGagAAoJEIEx tcQpvGagWPEH/2l0DNr9QkTwJUxOoP9wgHfmVhqc0ZlDsBFv91I3BbhGKI5UATbipKNqG13Z TsBrJHcrnCqnTRS+8n9/myOF0ng2A4YT0EJnayzHugXm+hrkO5O9UEPJ8a+0553VqyoFhHqA zjxj8fUu1px5cbb4R9G4UAySqyeLLeqnYLCKb4+GklGSBGsLMYvLmIDNYlkhMdnnzsSUAS61 WJYW6jjnzMwuKJ0ZHv7xZvSHyhIsFRiYiEs44kiYjbUUMcXor/uLEuTIazGrE3MahuGdjpT2 IOjoMiTsbMc0yfhHp6G/2E769oDXMVxCCbMVpA+LUtVIQEA+8Zr6mX0Yk4nDS7OiBlvOwE0E U8AbwQEIAKxr71oqe+0+MYCc7WafWEcpQHFUwvYLcdBoOnmJPxDwDRpvU5LhqSPvk/yJdh9k 4xUDQu3rm1qIW2I9Puk5n/Jz/lZsqGw8T13DKyu8eMcvaA/irm9lX9El27DPHy/0qsxmxVmU pu9y9S+BmaMb2CM9IuyxMWEl9ruWFS2jAWh/R8CrdnL6+zLk60R7XGzmSJqF09vYNlJ6Bdbs MWDXkYWWP5Ub1ZJGNJQ4qT7g8IN0qXxzLQsmz6tbgLMEHYBGx80bBF8AkdThd6SLhreCN7Uh IR/5NXGqotAZao2xlDpJLuOMQtoH9WVNuuxQQZHVd8if+yp6yRJ5DAmIUt5CCPcAEQEAAcLB gQQYAQIBKwUCU8AbwgUbDAAAAMBdIAQZAQgABgUCU8AbwQAKCRCTYAaomC8PVQ0VCACWk3n+ obFABEp5Rg6Qvspi9kWXcwCcfZV41OIYWhXMoc57ssjCand5noZi8bKg0bxw4qsg+9cNgZ3P N/DFWcNKcAT3Z2/4fTnJqdJS//YcEhlr8uGs+ZWFcqAPbteFCM4dGDRruo69IrHfyyQGx16s CcFlrN8vD066RKevFepb/ml7eYEdN5SRALyEdQMKeCSf3mectdoECEqdF/MWpfWIYQ1hEfdm C2Kztm+h3Nkt9ZQLqc3wsPJZmbD9T0c9Rphfypgw/SfTf2/CHoYVkKqwUIzI59itl5Lze+R5 wDByhWHx2Ud2R7SudmT9XK1e0x7W7a5z11Q6vrzuED5nQvkhAAoJEIExtcQpvGagugcIAJd5 EYe6KM6Y6RvI6TvHp+QgbU5dxvjqSiSvam0Ms3QrLidCtantcGT2Wz/2PlbZqkoJxMQc40rb fXa4xQSvJYj0GWpadrDJUvUu3LEsunDCxdWrmbmwGRKqZraV2oG7YEddmDqOe0Xm/NxeSobc MIlnaE6V0U8f5zNHB7Y46yJjjYT/Ds1TJo3pvwevDWPvv6rdBeV07D9s43frUS6xYd1uFxHC 7dZYWJjZmyUf5evr1W1gCgwLXG0PEi9n3qmz1lelQ8lSocmvxBKtMbX/OKhAfuP/iIwnTsww 95A2SaPiQZA51NywV8OFgsN0ITl2PlZ4Tp9hHERDe6nQCsNI/Us= In-Reply-To: <20260826201500.3000125-3-danesh.petigara@broadcom.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e On 8/26/26 13:14, Danesh Petigara wrote: > From: Justin Chen > > A compromised or buggy DCPU coprocessor can make any user who reads > world-readable /sys/devices/.../dpfe_info|dpfe_dram trigger a kernel > stack out-of-bounds read of arbitrary extent. This bounds checks > chksum_idx against MSG_FIELD_MAX after reading the response from DCPU > message RAM. > > Fixes: 5d06f53d9509 ("memory: brcmstb: dpfe: Compute checksum at __send_command() time") > Cc: stable@vger.kernel.org > Signed-off-by: Justin Chen > Assisted-by: Gemini:gemini-3.1-pro-preview cursor > Signed-off-by: Danesh Petigara Reviewed-by: Florian Fainelli -- Florian