CVE-2026-53280 iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done()

In the Linux kernel, the following vulnerability has been resolved: iommu: Fix NULL group-domain dereference in pcidevresetiommudone Local sashiko review pointed it out that group-domain could be NULL when a default domain fails to allocate during the first probe, which can crash at...