scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo()

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@oracle.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index 8d12017b9893..4470630dd545 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -2687,6 +2687,8 @@ 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));