[PATCH 4.14 36/42] scsi: qla2xxx: Fix incorrect region-size setting in optrom SYSFS routines

[Greg Kroah-Hartman]

From: Andrew Vasquez <andrewv@xxxxxxxxxxx>

commit 5cbdae10bf11f96e30b4d14de7b08c8b490e903c upstream.

Commit e6f77540c067 ("scsi: qla2xxx: Fix an integer overflow in sysfs
code") incorrectly set 'optrom_region_size' to 'start+size', which can
overflow option-rom boundaries when 'start' is non-zero.  Continue setting
optrom_region_size to the proper adjusted value of 'size'.

Fixes: e6f77540c067 ("scsi: qla2xxx: Fix an integer overflow in sysfs code")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Andrew Vasquez <andrewv@xxxxxxxxxxx>
Signed-off-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/scsi/qla2xxx/qla_attr.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -345,7 +345,7 @@ qla2x00_sysfs_write_optrom_ctl(struct fi
 		}
 
 		ha->optrom_region_start = start;
-		ha->optrom_region_size = start + size;
+		ha->optrom_region_size = size;
 
 		ha->optrom_state = QLA_SREADING;
 		ha->optrom_buffer = vmalloc(ha->optrom_region_size);
@@ -418,7 +418,7 @@ qla2x00_sysfs_write_optrom_ctl(struct fi
 		}
 
 		ha->optrom_region_start = start;
-		ha->optrom_region_size = start + size;
+		ha->optrom_region_size = size;
 
 		ha->optrom_state = QLA_SWRITING;
 		ha->optrom_buffer = vmalloc(ha->optrom_region_size);