Linux Kernel Universal Plane Initialization Vulnerability Leading to Resource Leak

A vulnerability in the Linux kernel's handling of universal planes in the Direct Rendering Manager (DRM) can lead to a resource leak. The issue arises in the __drm_universal_plane_init() function, where a range check for the format_count parameter is currently positioned after the resource allocation. This oversight can cause the format_types array to be leaked and fail to properly unregister the mode object, resulting in a leak of the modeset identifier. By moving the range check to the beginning of the function, the vulnerability can be mitigated before allocating resources.

Impact

The vulnerability causes a resource leak by failing to properly unregister mode objects, which can lead to unintended consequences in resource management and object lifecycle handling within the graphics subsystem.