drm/vkms: Fix use after free and double free on init error

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The vulnerability of the DRM/amdgpu/vkms components of the Linux operating system, related to pointer dereferencing errors, allows a hacker to trigger a service failure.

The vulnerability of the DRM/amdgpu/vkms components of the Linux operating system is related to pointer arithmetic errors. Exploiting this vulnerability can allow an attacker to cause a service failure...