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Tue, 31 Jul 2018 11:35:55 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:49308 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732169AbeGaPfy (ORCPT ); Tue, 31 Jul 2018 11:35:54 -0400 Received: from 1.general.cking.uk.vpn ([10.172.193.212]) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1fkV7W-0002Qz-PC; Tue, 31 Jul 2018 13:55:26 +0000 Subject: Re: [PATCH][media-next] media: i2c: mt9v111: fix off-by-one array bounds check To: jacopo mondi Cc: Mauro Carvalho Chehab , linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org References: <20180731133343.22337-1-colin.king@canonical.com> <20180731135341.GD370@w540> From: Colin Ian King Openpgp: preference=signencrypt Autocrypt: addr=colin.king@canonical.com; prefer-encrypt=mutual; keydata= xsFNBE6TJCgBEACo6nMNvy06zNKj5tiwDsXXS+LhT+LwtEsy9EnraKYXAf2xwazcICSjX06e fanlyhB0figzQO0n/tP7BcfMVNG7n1+DC71mSyRK1ZERcG1523ajvdZOxbBCTvTitYOy3bjs +LXKqeVMhK3mRvdTjjmVpWnWqJ1LL+Hn12ysDVVfkbtuIm2NoaSEC8Ae8LSSyCMecd22d9Pn LR4UeFgrWEkQsqROq6ZDJT9pBLGe1ZS0pVGhkRyBP9GP65oPev39SmfAx9R92SYJygCy0pPv BMWKvEZS/7bpetPNx6l2xu9UvwoeEbpzUvH26PHO3DDAv0ynJugPCoxlGPVf3zcfGQxy3oty dNTWkP6Wh3Q85m+AlifgKZudjZLrO6c+fAw/jFu1UMjNuyhgShtFU7NvEzL3RqzFf9O1qM2m uj83IeFQ1FZ65QAiCdTa3npz1vHc7N4uEQBUxyXgXfCI+A5yDnjHwzU0Y3RYS52TA3nfa08y LGPLTf5wyAREkFYou20vh5vRvPASoXx6auVf1MuxokDShVhxLpryBnlKCobs4voxN54BUO7m zuERXN8kadsxGFzItAyfKYzEiJrpUB1yhm78AecDyiPlMjl99xXk0zs9lcKriaByVUv/NsyJ FQj/kmdxox3XHi9K29kopFszm1tFiDwCFr/xumbZcMY17Yi2bQARAQABzSJDb2xpbiBLaW5n IDxjb2xpbi5raW5nQHVidW50dS5jb20+wsF3BBMBCAAhBQJPCrjvAhsDBQsJCAcDBRUKCQgL BRYCAwEAAh4BAheAAAoJEGjCh9/GqAImjVsP/iA8hDQy7LlMYepND9tKJD2haNLmsBC+yuxX BybYprtSjwvMbx6CtmtiJ4nGfdBzbZv3xOJPr/n6wxrdfGHEFn0W8Au97Xvk087P7alCwBXz y1Hk1aTlhLOGunOLv6SWRYRUAHvWEoVlxPSo2UNJ6D01d9tc7IJU08MlAl+u048S6625G5SG tfOJpFyGqaWGazMpkYdbJuY9acNAQAl1GzZPDCyLrxaBJypqmp3W+rb7m9arNRMlygevFU6e UGrR7QiVuumTGebGF9D63H9LD0E/1EhOA4QWHq1/u7CXLr9qo1YyAUtYAICs0wyRbI6wWPyi 5IyOTiWCVP3qSxV4JR8qq8JhGEwxS5fEB76r+XGxcL7qqiQmVx3bkjlT6FnnanPcD7RsMOAg NcpeftVsqignFPA3XHaDeew4t99ef+wKwiiyU7jqduvSt8amLVip5dxN1TYKqWPauIHL3E2A KIKuqsZ9ftUJ3NXClAfI3EHPMYbok6b04nZSWmBttKHr8YkVF5b4jrabMLlVoCg+DGYffyDS YDwy9FPvJWkt6nffUXciearieSlHEt3f12CPp6OOR8yFZWlISYKdD9PDzXP9kJYTEWnr7dD3 feEZK+J9N5wpCU7HvfrA5HCOMJgf8Dcfscrj9H2Qp8vbErMP7jZ6OYapCOV5MZS6W57wlG2k zsFNBE6TJCgBEADF+hz+c0qF0R58DwiM8M/PopzFu5ietBpl0jUzglaKhMZKKW7lAr4pzeE4 PgJ4ZwQd0dSkx63hRqM963Fe35iXrreglpwZxgbbGluRJpoeoGWzuUpXE6Ze0A2nICFLk79a YHsFRwnKyol9M0AyZHCvBXi1HAdj17iXerCYN/ZILD5SO0dDiQl570/1Rp3d1z0l16DuCnK+ X3I7GT8Z9B3WAr6KCRiP0Grvopjxwkj4Z191mP/auf1qpWPXEAPLVAvu5oM7dlTIxX7dYa6f wlcm1uobZvmtXeDEuHJ3TkbFgRHrZwuh50GMLguG1QjhIPXlzE7/PBQszh5zGxPj8cR81txs 6K/0GGRnIrPhCIlOoTU8L+BenxZF31uutdScHw1EAgB6AsRdwdd8a9AR+XdhHGzQel8kGyBp 4MA7508ih0L9+MBPuCrSsccjwV9+mfsTszrbZosIhVpBaeHNrUMphwFe9HbGUwQeS6tOr+py bOtNUHeiJ5aU3Npo3eZkWVGePP2O4vr8rjVQ1xZMIWA18xUaLTvVSarV7/IqjLb0uMTz6Ng7 SceqjsgxO4J35pPOCG8gy85Tmd5NKe46K1xGsNG2zzfXQ6cNkofUyQFGVbLCtdfQyWV7+dgU nOnPhrTKpFfJ5lnWpLpze0LfyW03CpWx9x4yMlwcvIFw2hLaOQARAQABwsFfBBgBCAAJBQJO kyQoAhsMAAoJEGjCh9/GqAImeJYP/jdppMeb7AZnLGVXd8rN7CLBtfMOkXCWaOUhjMRAY7dV IMiF1iPZc6SgiiMSsdG7JJhMjMuLTxA0kX2Z6P0+6dZlO4bDOKMIv4nNGhgSj9NuSKJPRiyi XKKD/wNnPXVFdBZsoHnEXGyAFGnidu4KLUJIiSm4tHJdoMk0ZaJSmwt0dtytuC1IWH8eIaVo /Ah6FxCaznRzvGNFx+9Ofcc7+aMZ15dkg9XagOuiDZ1/r6VuEw9ovnkDT4H5BAsysxo/qykX 4XQ2RQSY/P3td9WNLeXLvt1aJNRcwcIEKgZ5AO3YQbEJt1dEfCU7TAKiRpsjnC/iQiQHGt2I vNci8oZmM3EQEi7yZqD07A6dpGTnRq9OQ7fGhj0SS99yZvooH3fBIHA2LRuvhfDAgTrpbU0w LvkAIo0T2b9SoRCV8FEpHvR2b86NbTU5WN4eqZQbAbnxC7tJp6kLx2Zn2uQMvfXRfnS9R1ja etvpk3h7F+r/RAAh+EvgsPUNaiRJRRLvf9bxTQZhmNrw79eIFNsRIktniLyomJf2+WPOUECz h1lfLqe9yiuUKv+m5uAalXdayhiPbp/JHs1EDRgSq3tiirOsKrh/KMpwz/22qGMRBjFwYBhf 6ozgujmPlO5DVFtzfwOydzNlXTky7t4VU8yTGXZTJprIO+Gs72Q1e+XVIoKl3MIx Message-ID: Date: Tue, 31 Jul 2018 14:55:25 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180731135341.GD370@w540> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="LZ1qMDqUuxCCXYuIsl94ncFyuaq2aEgbe" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --LZ1qMDqUuxCCXYuIsl94ncFyuaq2aEgbe Content-Type: multipart/mixed; boundary="xJWLQlqaIbhqGrEllJgQyVPkM8z6YSdnR"; protected-headers="v1" From: Colin Ian King To: jacopo mondi Cc: Mauro Carvalho Chehab , linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Message-ID: Subject: Re: [PATCH][media-next] media: i2c: mt9v111: fix off-by-one array bounds check References: <20180731133343.22337-1-colin.king@canonical.com> <20180731135341.GD370@w540> In-Reply-To: <20180731135341.GD370@w540> --xJWLQlqaIbhqGrEllJgQyVPkM8z6YSdnR Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 31/07/18 14:53, jacopo mondi wrote: > Hi Colin, > thanks for the patch. >=20 > On Tue, Jul 31, 2018 at 02:33:43PM +0100, Colin King wrote: >> From: Colin Ian King >> >> The check of fse->index is off-by-one and should be using >=3D rather >> than > to check the maximum allowed array index. Fix this. >> >> Detected by CoverityScan, CID#172122 ("Out-of-bounds read") >> >> Fixes: aab7ed1c3927 ("media: i2c: Add driver for Aptina MT9V111") >> Signed-off-by: Colin Ian King >=20 > Acked-by: Jacopo Mondi >=20 > Thanks > j >=20 Just to note, I also got a build warning on this driver, so that's something that should be fixed up too. drivers/media/i2c/mt9v111.c:887:15: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized] unsigned int idx; --xJWLQlqaIbhqGrEllJgQyVPkM8z6YSdnR-- --LZ1qMDqUuxCCXYuIsl94ncFyuaq2aEgbe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEcGLapPABucZhZwDPaMKH38aoAiYFAltgak0ACgkQaMKH38ao AiakZA//R+e/bYVFB1kP+CDC3nVxffaAMDLFejUiGZfn5xkpyVLkp5cnIas1g4En Yzxe8IRm9tS3iByFeQA/jZPgg3uyJjAB6qei9sKPx0RWzw/7uFTjycDs8DXpxoY5 ZExZtWd7/Afx+IoXy1O2r6HFKkmOQ1l2uYSYV3wBh9O43rQra9tJna4w5E2dFZmr DaFUtbD4eynrTXzMC7ct8uaP6ijGDOKPztnLNRSqDRRl9yOmSKcaOzARtluhicn3 stBTjqtqIRhbtejMhNyNjAvmHf+PXCZ7CTS8Vt4vCwBWc0ikeUeNu7he7xP5mA4V fSSaAZRaLMtk5l2nzJCqeZEOg1ROJ1GmTvYQx/AKn3R+eS3PVxUTqLVmZLUtATNQ V+6jhA4Av6Von1bXaLgqBbW4tZ5PMEFGQI+vsRTh9n2jGuadYsQgRVobnWvfCqAE yXDxwes6ILwfEzzEf+VnpEuFQSTDD5Rmdh8pPKc6FhVMXzU1uc2cU09YRZzv0RLJ Pq4ARPLgkljGilDp266+61I1oDx3uG3HpOuCX4MtjUnsBAYljT4tM9588ioc8B3E O5qjrZrHhe4Ebumcbb6ZnE+NwkJNLL4QNMSA2lpNNjlTgYhr880gzC4rke1cAq+E pkfrhWbxRaDwY+rQd4xwmzzvZhzxrsbmt0WIfDqp7kYe0Iiu/tw= =qqSn -----END PGP SIGNATURE----- --LZ1qMDqUuxCCXYuIsl94ncFyuaq2aEgbe--