UBUNTU-CVE-2022-49827

In the Linux kernel, the following vulnerability has been resolved: drm: Fix potential null-ptr-deref in drmvblankdestroyworker drmvblankinit call drmmaddactionorreset with drmvblankinitrelease as action. If drmmaddaction failed, will directly call drmvblankinitrelease with the vblank whose worke...