From: Martin Wilck <mwilck@suse.com>
Date: Mon, 27 Nov 2017 22:47:34 +0000 (+0100)
Subject: scsi: scsi_devinfo: handle non-terminated strings
X-Git-Tag: v4.14.187~77
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=263968a2d77a14507a82e63b70dd385e2bc03cd8;p=users%2Fdwmw2%2Flinux.git

scsi: scsi_devinfo: handle non-terminated strings

commit ba69ead9e9e9bb3cec5faf03526c36764ac8942a upstream.

devinfo->vendor and devinfo->model aren't necessarily
zero-terminated.

Fixes: b8018b973c7c "scsi_devinfo: fixup string compare"
Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index 9654898f3e512..6748e82c6352f 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -449,7 +449,8 @@ static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 			/*
 			 * vendor strings must be an exact match
 			 */
-			if (vmax != strlen(devinfo->vendor) ||
+			if (vmax != strnlen(devinfo->vendor,
+					    sizeof(devinfo->vendor)) ||
 			    memcmp(devinfo->vendor, vskip, vmax))
 				continue;
 
@@ -457,7 +458,7 @@ static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor,
 			 * @model specifies the full string, and
 			 * must be larger or equal to devinfo->model
 			 */
-			mlen = strlen(devinfo->model);
+			mlen = strnlen(devinfo->model, sizeof(devinfo->model));
 			if (mmax < mlen || memcmp(devinfo->model, mskip, mlen))
 				continue;
 			return devinfo;