CVE-2026-43237 drm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Refactor amdgpugemvaioctl for Handling Last Fence Update and Timeline Management v4 This commit simplifies the amdgpugemvaioctl function, key updates include: - Moved the logic for managing the last update fence...