linux-kernel - [PATCH] scsi: ibmvscsis: Fix a stringop-overflow warning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180910223723.25357-1-labbott@redhat.com>
Date:   Mon, 10 Sep 2018 15:37:23 -0700
From:   Laura Abbott <labbott@...hat.com>
To:     "Bryant G. Ly" <bryantly@...ux.vnet.ibm.com>,
        Michael Cyr <mikecyr@...ux.vnet.ibm.com>
Cc:     Laura Abbott <labbott@...hat.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Prarit Bhargava <prarit@...hat.com>
Subject: [PATCH] scsi: ibmvscsis: Fix a stringop-overflow warning

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 using strlcat which correctly accounts for lengths that
are equal to the destination buffer.

Signed-off-by: Laura Abbott <labbott@...hat.com>
---
 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index fac377320158..53d344d8dc43 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -3475,7 +3475,7 @@ static int ibmvscsis_probe(struct vio_dev *vdev,
 		vscsi->dds.window[REMOTE].liobn);
 
 	strcpy(vscsi->eye, "VSCSI ");
-	strncat(vscsi->eye, vdev->name, MAX_EYE);
+	strlcat(vscsi->eye, vdev->name, MAX_EYE);
 
 	vscsi->dds.unit_id = vdev->unit_address;
 	strncpy(vscsi->dds.partition_name, partition_name,
-- 
2.17.1