[PATCH 3/3] scsi: myrs: prevent negatives in disable_enclosure_messages_store()

[Dan Carpenter]

We only want the value to be zero or one.

It's not a big deal, but say we passed set value to INT_MIN, then
disable_enclosure_messages_show() would return that 12 bytes of "buf"
are initialized but actually only 3 are.  I think there are tools like
KASAN which will trigger an info leak warning when that happens.

Fixes: 77266186397c ("scsi: myrs: Add Mylex RAID controller (SCSI interface)")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
 drivers/scsi/myrs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c
index 07e5a3f54e31..55842ed54231 100644
--- a/drivers/scsi/myrs.c
+++ b/drivers/scsi/myrs.c
@@ -1501,7 +1501,7 @@ static ssize_t disable_enclosure_messages_store(struct 
device *dev,
        if (ret)
                return ret;
 
-       if (value > 2)
+       if (value < 0 || value > 2)
                return -EINVAL;
 
        cs->disable_enc_msg = value;
-- 
2.11.0