In csio_eh_lun_reset_handler(), there is an if statement on line 2072 to
check whether rn is NULL:
if (!rn)
When rn is NULL, it is used on line 2217:
CSIO_INC_STATS(rn, n_lun_rst_fail);
Thus, a possible null-pointer dereference may occur.
To fix this bug, csio_eh_lun_reset_handler() directly returns FAILED
when rn is NULL.
This bug is found by a static analysis tool STCheck written by us.
Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxxxx>
---
drivers/scsi/csiostor/csio_scsi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/csiostor/csio_scsi.c b/drivers/scsi/csiostor/csio_scsi.c
index 469d0bc9f5fe..c81d743d3544 100644
--- a/drivers/scsi/csiostor/csio_scsi.c
+++ b/drivers/scsi/csiostor/csio_scsi.c
@@ -2070,7 +2070,7 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd)
struct csio_scsi_level_data sld;
if (!rn)
- goto fail;
+ return FAILED;
csio_dbg(hw, "Request to reset LUN:%llu (ssni:0x%x tgtid:%d)\n",
cmnd->device->lun, rn->flowid, rn->scsi_id);
--
2.17.0
