CVE-2025-38216

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommu/vt-d: Restore context entry setup order for aliased devices<br /> <br /> Commit 2031c469f816 ("iommu/vt-d: Add support for static identity domain")<br /> changed the context entry setup during domain attachment from a<br /> set-and-check policy to a clear-and-reset approach. This inadvertently<br /> introduced a regression affecting PCI aliased devices behind PCIe-to-PCI<br /> bridges.<br /> <br /> Specifically, keyboard and touchpad stopped working on several Apple<br /> Macbooks with below messages:<br /> <br /> kernel: platform pxa2xx-spi.3: Adding to iommu group 20<br /> kernel: input: Apple SPI Keyboard as<br /> /devices/pci0000:00/0000:00:1e.3/pxa2xx-spi.3/spi_master/spi2/spi-APP000D:00/input/input0<br /> kernel: DMAR: DRHD: handling fault status reg 3<br /> kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr<br /> 0xffffa000 [fault reason 0x06] PTE Read access is not set<br /> kernel: DMAR: DRHD: handling fault status reg 3<br /> kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr<br /> 0xffffa000 [fault reason 0x06] PTE Read access is not set<br /> kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00<br /> kernel: DMAR: DRHD: handling fault status reg 3<br /> kernel: DMAR: [DMA Read NO_PASID] Request device [00:1e.3] fault addr<br /> 0xffffa000 [fault reason 0x06] PTE Read access is not set<br /> kernel: DMAR: DRHD: handling fault status reg 3<br /> kernel: applespi spi-APP000D:00: Error writing to device: 01 0e 00 00<br /> <br /> Fix this by restoring the previous context setup order.