In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: amdkfd_free_gtt_mem clear the correct pointer Pass pointer reference to amdgpu_bo_unref to clear the correct pointer, otherwise amdgpu_bo_unref clear the local variable, the original pointer not set to NULL, this could cause use-after-free bug.
https://git.kernel.org/stable/c/c86ad39140bbcb9dc75a10046c2221f657e8083b
https://git.kernel.org/stable/c/71f3240f82987f0f070ea5bed559033de7d4c0e1
https://git.kernel.org/stable/c/6c9289806591807e4e3be9a23df8ee2069180055
https://git.kernel.org/stable/c/30ceb873cc2e97348d9da2265b2d1ddf07f682e1