From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kees Cook Subject: [PATCH] scsi: qedf: Avoid reading past end of buffer Date: Fri, 5 May 2017 15:42:55 -0700 Message-ID: <20170505224255.GA21521@beast> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: QLogic-Storage-Upstream@cavium.com, "James E.J. Bottomley" , "Martin K. Petersen" , linux-kernel@vger.kernel.org, Daniel Micay List-Id: linux-scsi@vger.kernel.org Using memcpy() from a string that is shorter than the length copied means the destination buffer is being filled with arbitrary data from the kernel rodata segment. Instead, use strncpy() which will fill the trailing bytes with zeros. This was found with the future CONFIG_FORTIFY_SOURCE feature. Cc: Daniel Micay Signed-off-by: Kees Cook --- drivers/scsi/qedf/qedf_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c index cceddd995a4b..a5c97342fd5d 100644 --- a/drivers/scsi/qedf/qedf_main.c +++ b/drivers/scsi/qedf/qedf_main.c @@ -2895,7 +2895,7 @@ static int __qedf_probe(struct pci_dev *pdev, int mode) slowpath_params.drv_minor = QEDF_DRIVER_MINOR_VER; slowpath_params.drv_rev = QEDF_DRIVER_REV_VER; slowpath_params.drv_eng = QEDF_DRIVER_ENG_VER; - memcpy(slowpath_params.name, "qedf", QED_DRV_VER_STR_SIZE); + strncpy(slowpath_params.name, "qedf", QED_DRV_VER_STR_SIZE); rc = qed_ops->common->slowpath_start(qedf->cdev, &slowpath_params); if (rc) { QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n"); -- 2.7.4 -- Kees Cook Pixel Security