drm/panthor: validate group queue count

A panthor group can have at most MAX_CS_PER_CSG panthor queues.

Fixes: 4bdca11 ("drm/panthor: Add the driver frontend block")
Signed-off-by: Chia-I Wu <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]> # v1
Reviewed-by: Steven Price <[email protected]>
Signed-off-by: Steven Price <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: olvaffe

drivers/gpu/drm/panthor/panthor_drv.c

@@ -1094,7 +1094,7 @@ static int panthor_ioctl_group_create(struct drm_device *ddev, void *data,
 	struct drm_panthor_queue_create *queue_args;
 	int ret;
 
-	if (!args->queues.count)
+	if (!args->queues.count || args->queues.count > MAX_CS_PER_CSG)
 		return -EINVAL;
 
 	ret = PANTHOR_UOBJ_GET_ARRAY(queue_args, &args->queues);