[06/15] qla2xxx: Fix incorrect region-size setting in optrom SYSFS routines.

Commit Message

Himanshu Madhani March 28, 2019, 5:10 p.m. UTC

From: Andrew Vasquez <[e-mail]>

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: [e-mail]
Signed-off-by: Andrew Vasquez <[e-mail]>
Signed-off-by: Himanshu Madhani <[e-mail]>
---
 drivers/scsi/qla2xxx/qla_attr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 8687090193dc..93058379d3c8 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -376,7 +376,7 @@  qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		}
 
 		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);
@@ -449,7 +449,7 @@  qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		}
 
 		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);