In the Linux kernel, the following vulnerability has been resolved: drm/tegra: Fix NULL vs IS_ERR() check in probe() The iommu_paging_domain_alloc() function doesn't return NULL pointers, it returns error pointers. Update the check to match.
https://git.kernel.org/stable/c/a85df8c7b5ee2d3d4823befada42c5c41aff4cb0
https://git.kernel.org/stable/c/6d6c005855b97b8caf6039c1774745ee74c91fa6