staging: dgnc: off by one in dgnc_mgmt_ioctl()
"dgnc_NumBoards" is the number of initialized elements in the
dgnc_Board[] array so the comparison should be ">=" instead of ">" so we
don't read invalid data. We can remove the special handling of the
empty array now that we've fixed this bug.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/dgnc/dgnc_mgmt.c b/drivers/staging/dgnc/dgnc_mgmt.c
index 5544a8e7..b89bd59 100644
--- a/drivers/staging/dgnc/dgnc_mgmt.c
+++ b/drivers/staging/dgnc/dgnc_mgmt.c
@@ -153,8 +153,7 @@
if (copy_from_user(&brd, uarg, sizeof(int)))
return -EFAULT;
- if ((brd < 0) || (brd > dgnc_NumBoards) ||
- (dgnc_NumBoards == 0))
+ if (brd < 0 || brd >= dgnc_NumBoards)
return -ENODEV;
memset(&di, 0, sizeof(di));