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scsi: scsi_devinfo: handle non-terminated strings

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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>
This commit is contained in:
Martin Wilck 2017-11-27 23:47:34 +01:00 committed by Sasha Levin
parent b17fd5fbdd
commit ec0bdc2824
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/scsi_devinfo.c
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@ -451,7 +451,8 @@ 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;
@ -459,7 +460,7 @@ 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;