[PATCH 6.16 079/627] staging: gpib: fix unset padding field copy back to userspace
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2025-08-12 18:30:36
Also in:
linux-patches
Subsystem:
staging subsystem, the rest · Maintainers:
Greg Kroah-Hartman, Linus Torvalds
6.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Colin Ian King <redacted>
[ Upstream commit a739d3b13bff0dfa1aec679d08c7062131a2a425 ]
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.
Signed-off-by: Colin Ian King <redacted>
Fixes: 9dde4559e939 ("staging: gpib: Add GPIB common core driver")
Signed-off-by: Dan Carpenter <redacted>
Link: https://lore.kernel.org/r/20250623220958.280424-1-colin.i.king@gmail.com (local)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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;
--
2.39.5