In the Linux kernel, the following vulnerability has been resolved: drm/admgpu: fix dereferencing null pointer context When user space sets an invalid ta type, the pointer context will be empty. So it need to check the pointer context before using it
https://git.kernel.org/stable/c/641dac64178ccdb9e45c92b67120316896294d05
https://git.kernel.org/stable/c/4fd52f7c2c11d330571c6bde06e5ea508ec25c9d
https://git.kernel.org/stable/c/030ffd4d43b433bc6671d9ec34fc12c59220b95d