CVE-2023-54043

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommufd: Do not add the same hwpt to the ioas-&gt;hwpt_list twice<br /> <br /> The hwpt is added to the hwpt_list only during its creation, it is never<br /> added again. This hunk is some missed leftover from rework. Adding it<br /> twice will corrupt the linked list in some cases.<br /> <br /> It effects HWPT specific attachment, which is something the test suite<br /> cannot cover until we can create a legitimate struct device with a<br /> non-system iommu "driver" (ie we need the bus removed from the iommu code)