Linux Kernel drm/sti Error Pointer Dereference Vulnerability

A vulnerability in the Linux kernel's Direct Rendering Manager (DRM) subsystem, specifically within the STI (Société de Transport de l'Île) driver, has been addressed. The issue involved a potential dereference of error pointers, which could lead to unintended behavior. The vulnerability arose because the return value of the 'drm_atomic_get_crtc_state()' function was not properly checked, allowing for the possibility of using an erroneous 'crtc_state' pointer in the event of a failure.

Impact

The vulnerability could lead to a null pointer dereference, potentially causing a system crash or other unintended behavior.