Harry Wentland

A dynamic memory safety error detector (KASAN) catches and generates error messages "BUG: KASAN: slab-out-of-bounds" as the writeback connector does not support certain features which are not initialized. The issue occurs in the drm/amd/display component when it attempts to write back data. To resolve this, the connector type is checked, and if it is DRM MODE CONNECTOR WRITEBACK, the operation is skipped.

The issue is related to a NULL pointer dereference in the Linux kernel's drm/amd/display module. Specifically, during the hibernate sequence, the source context might not have a clk mgr, which can lead to a NULL pointer dereference. This can cause a denial of service. The vulnerability is associated with the function dc resource state copy construct() in the drivers/gpu/drm/amd/display/dc/core/dc resource.c file of the AMD video driver.