Hello everyone,I found that macro `CALLPTR` in drivers/media/v4l2-core/videobuf-core.c can evaluate to NULL yet all its usages (__videobuf_copy_to_user, __videobuf_copy_stream) are never NULL checked. I doubt but am not completely sure that use cases of the CALLPTR macro can accept NULL pointers. Please let me know if it makes sense or not.
Best, Shaobo
