CVE-2024-49876

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/xe: fix UAF around queue destruction<br /> <br /> We currently do stuff like queuing the final destruction step on a<br /> random system wq, which will outlive the driver instance. With bad<br /> timing we can teardown the driver with one or more work workqueue still<br /> being alive leading to various UAF splats. Add a fini step to ensure<br /> user queues are properly torn down. At this point GuC should already be<br /> nuked so queue itself should no longer be referenced from hw pov.<br /> <br /> v2 (Matt B)<br /> - Looks much safer to use a waitqueue and then just wait for the<br /> xa_array to become empty before triggering the drain.<br /> <br /> (cherry picked from commit 861108666cc0e999cffeab6aff17b662e68774e3)