[PATCH][next] staging: gpib: fix unset padding field copy back to userspace

[Colin Ian King]

The introduction of a padding field in the gpib_board_info_ioctl is
showing up as initialized data on the stack frame being copyied back
to userspace in function board_info_ioctl. The simplest fix is to
initialize the entire struct to zero to ensure all unassigned padding
fields are zero'd before being copied back to userspace.

Fixes: b8394732ff0c ("staging: gpib: Add bit and byte padding to ioctl structs")
Signed-off-by: Colin Ian King <colin.i.king@xxxxxxxxx>
---
 drivers/staging/gpib/common/gpib_os.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/gpib/common/gpib_os.c b/drivers/staging/gpib/common/gpib_os.c
index a193d64db033..93ef5f6ce249 100644
--- a/drivers/staging/gpib/common/gpib_os.c
+++ b/drivers/staging/gpib/common/gpib_os.c
@@ -1774,7 +1774,7 @@ static int query_board_rsv_ioctl(struct gpib_board *board, unsigned long arg)
 
 static int board_info_ioctl(const struct gpib_board *board, unsigned long arg)
 {
-	struct gpib_board_info_ioctl info;
+	struct gpib_board_info_ioctl info = { };
 	int retval;
 
 	info.pad = board->pad;
-- 
2.50.0