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Wed, 4 Aug 2021 12:38:09 +0000 Date: Wed, 4 Aug 2021 15:37:42 +0300 From: Dan Carpenter To: "Gustavo A. R. Silva" Cc: Sakari Ailus , "Gustavo A. R. Silva" , linux-kernel@vger.kernel.org, Yong Zhi , Bingbu Cao , Tianshu Qiu , Mauro Carvalho Chehab , Greg Kroah-Hartman , linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-hardening@vger.kernel.org Subject: Re: [PATCH v2 1/2] media: staging/intel-ipu3: css: Fix wrong size comparison Message-ID: <20210804123742.GH1931@kadam> References: <184d96f95d6261b1a91704eb68adbd0a2e1c2cc2.1627646101.git.gustavoars@kernel.org> <20210802060546.GL3@paasikivi.fi.intel.com> <3c9ac43d-09ca-e5d5-83a8-7b6d23928763@embeddedor.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3c9ac43d-09ca-e5d5-83a8-7b6d23928763@embeddedor.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-ClientProxiedBy: JNAP275CA0041.ZAFP275.PROD.OUTLOOK.COM (2603:1086:0:4e::16) To MWHPR1001MB2365.namprd10.prod.outlook.com (2603:10b6:301:2d::28) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from kadam (102.222.70.252) by JNAP275CA0041.ZAFP275.PROD.OUTLOOK.COM (2603:1086:0:4e::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4373.18 via Frontend Transport; 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Sakari is right that it should be < sizeof(). <= doesn't work at all ever. If you wanted a higher limit then the next limit woule be: if (css->fw->size < struct_size(css->fwp, binary_header, 1)) regards, dan carpenter