In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check in resourcelogpipetopologyupdate [WHY] When switching from "Extend" to "Second Display Only" we sometimes call resourcegetotgmasterforstream on a stream for the eDP, which is disconnected. This leads to a null pointer dereference. [HOW] Added a null check in dcresource.c/resourcelogpipetopologyupdate.