On Wed, Jun 16, 2021 at 01:26:15PM -0700, Kees Cook wrote:

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally read across neighboring array fields.

Without a flexible array, this looks like an attempt to perform a
memcpy() read beyond the end of the packet->mad.data array:

drivers/infiniband/core/user_mad.c:
	memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR);

Switch from [0] to [] to use the appropriately handled type for trailing
bytes.

Signed-off-by: Kees Cook <redacted>
---
 include/uapi/rdma/ib_user_mad.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Applied to for-next, thanks

Jason