From: Laura Abbott <labbott@redhat.com>
Date: Tue, 11 Sep 2018 12:22:25 -0700
Subject: scsi: ibmvscsis: Fix a stringop-overflow warning
Git-commit: d792d4c4fc866ae224b0b0ca2aabd87d23b4d6cc
Patch-mainline: v4.19-rc6
References: git-fixes
There's currently a warning about string overflow with strncat:
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c: In function 'ibmvscsis_probe':
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:3479:2: error: 'strncat' specified
bound 64 equals destination size [-Werror=stringop-overflow=]
strncat(vscsi->eye, vdev->name, MAX_EYE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Switch to a single snprintf instead of a strcpy + strcat to handle this
cleanly.
Signed-off-by: Laura Abbott <labbott@redhat.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index fac377320158..b3a029ad07cd 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -3474,8 +3474,7 @@ static int ibmvscsis_probe(struct vio_dev *vdev,
vscsi->dds.window[LOCAL].liobn,
vscsi->dds.window[REMOTE].liobn);
- strcpy(vscsi->eye, "VSCSI ");
- strncat(vscsi->eye, vdev->name, MAX_EYE);
+ snprintf(vscsi->eye, sizeof(vscsi->eye), "VSCSI %s", vdev->name);
vscsi->dds.unit_id = vdev->unit_address;
strncpy(vscsi->dds.partition_name, partition_name,