drm/amd/display: Add null check for 'afb' in amdgpu_dm_plane_handle_cursor_update (v2)

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Linux Kernel Security Vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from improper handling of null pointer dereferences in the amdgpudmplanehandlecursorupdate function in the...