Linux Kernel Context Restoration Memory Leak Vulnerability in DRM XE ConfigFS

A memory leak vulnerability has been addressed in the Linux kernel's DRM XE ConfigFS component. The issue arises because the 'ctx_restore_mid_bb' memory, allocated in the 'wa_bb_store()' function, was not properly freed when the ConfigFS device was released. This oversight could lead to unnecessary memory consumption. The vulnerability has been fixed by ensuring that 'ctx_restore_mid_bb[0].cs' is freed as well, preventing the allocation from being lost when the ConfigFS device is removed.

Impact

The vulnerability could lead to a memory leak, where allocated memory is not properly released, potentially causing increased memory usage over time.