In the Linux kernel, the following vulnerability has been resolved: drm/radeon: check bo_va->bo is non-NULL before using it The call to radeon_vm_clear_freed might clear bo_va->bo, so we have to check it before dereferencing it.
https://git.kernel.org/stable/c/f13c96e0e325a057c03f8a47734adb360e112efe
https://git.kernel.org/stable/c/a9100f17428cb733c4f6fbb132d98bed76318342
https://git.kernel.org/stable/c/a2b201f83971df03c8e81a480b2f2846ae8ce1a3
https://git.kernel.org/stable/c/8a500b3a5f0a58c6f99039091fbd715f64f2f8af
https://git.kernel.org/stable/c/6fb15dcbcf4f212930350eaee174bb60ed40a536