[PATCH 4.9 55/96] scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo()

From: Greg Kroah-Hartman
Date: Thu May 24 2018 - 04:56:36 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

[ Upstream commit a7043e9529f3c367cc4d82997e00be034cbe57ca ]

My static checker complains about an out of bounds read:

drivers/message/fusion/mptctl.c:2786 mptctl_hp_targetinfo()
error: buffer overflow 'hd->sel_timeout' 255 <= u32max.

It's true that we probably should have a bounds check here.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/message/fusion/mptctl.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -2698,6 +2698,8 @@ mptctl_hp_targetinfo(unsigned long arg)
__FILE__, __LINE__, iocnum);
return -ENODEV;
}
+ if (karg.hdr.id >= MPT_MAX_FC_DEVICES)
+ return -EINVAL;
dctlprintk(ioc, printk(MYIOC_s_DEBUG_FMT "mptctl_hp_targetinfo called.\n",
ioc->name));