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SFS:(10009020)(136003)(396003)(39850400004)(376002)(346002)(366004)(199004)(189003)(25786009)(7736002)(36756003)(316002)(55236004)(6506007)(386003)(305945005)(102836004)(68736007)(6512007)(8936002)(97736004)(50226002)(53936002)(6436002)(6486002)(52116002)(76176011)(8676002)(3846002)(2906002)(105586002)(99286004)(81156014)(81166006)(4326008)(6116002)(486006)(476003)(66066001)(2616005)(86362001)(106356001)(14454004)(186003)(478600001)(54906003)(26005)(110136005)(71190400001)(71200400001)(11346002)(446003)(5660300002)(256004)(14444005); DIR:OUT; SFP:1101; SCL:1; SRVR:MN2PR18MB2672; H:MN2PR18MB2877.namprd18.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: marvell.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: TH3PS/uYyh2Omn7cQ7ZycB2/WMXLvU/JyWW3fl/AStMoPn6QqG6I8p//3iWU/OZUqi4YNp87GTK4OoYkXl4U3klesA0yT04ucmc8c6fYB2/7nubVGL+URrgAiIfRtiKjTn3QvcuO7eL+tgtCVayEFYQPzwmf1H4lI8VZr4xGSmnH6A0SmGtZ/z1ZABZFxBytpAsE7ff9Ol8rh9qtLe8qwPb05e0CESWydk2TZDBlx1DkAzBYPd6zPaFxOR+pri2AlgfkNosjqCOWMoxuPYJA7S5i6MXV7Y6smXCtJbRYYCVt0BmnISt1l8uLPLzBNF8niNeCVVfEpj2opfXxSu7AOzD+zIaUUbpmiaXEyxMFGARsP7FEYUV/DL1feGfK11AwCo+xa9d3/eJldG2PtSOrnhe9nVocSkLVzyS6dAnT/O0= MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 348e956b-e921-404c-3a24-08d6a5e63312 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Mar 2019 05:55:44.0679 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR18MB2672 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-11_05:, , signatures=0 Subject: [dpdk-dev] [PATCH v2] lib/cryptodev: fix driver name comparison X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The string compare to the length of driver name might give false positives when there are drivers with similar names (one being the subset of another). Following is such a naming which could result in false positive. 1. crypto_driver 2. crypto_driver1 When strncmp with len = strlen("crypto_driver") is done, it could give a false positive when compared against "crypto_driver1". For such cases, 'strlen + 1' is done, so that the NULL termination also would be considered for the comparison. Fixes: d11b0f30df88 ("cryptodev: introduce API and framework for crypto devices") Signed-off-by: Ankur Dwivedi Signed-off-by: Anoob Joseph Acked-by: Fiona Trahe Acked-by: Akhil Goyal --- v2: * Using strlen + 1, instead of RTE_CRYPTODEV_NAME_MAX_LEN for the comparison. * Strcmp would not cause this issue. Touching only the places which would result in the issue. lib/librte_cryptodev/rte_cryptodev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/librte_cryptodev/rte_cryptodev.c b/lib/librte_cryptodev/rte_cryptodev.c index 7009735..871d7dd 100644 --- a/lib/librte_cryptodev/rte_cryptodev.c +++ b/lib/librte_cryptodev/rte_cryptodev.c @@ -586,7 +586,7 @@ rte_cryptodev_devices_get(const char *driver_name, uint8_t *devices, cmp = strncmp(devs[i].device->driver->name, driver_name, - strlen(driver_name)); + strlen(driver_name) + 1); if (cmp == 0) devices[count++] = devs[i].data->dev_id; @@ -1691,7 +1691,7 @@ rte_cryptodev_driver_id_get(const char *name) TAILQ_FOREACH(driver, &cryptodev_driver_list, next) { driver_name = driver->driver->name; - if (strncmp(driver_name, name, strlen(driver_name)) == 0) + if (strncmp(driver_name, name, strlen(driver_name) + 1) == 0) return driver->id; } return -1;