CVE-2024-36944

In the Linux kernel, the following vulnerability has been resolved: Reapply
“drm/qxl: simplify qxl_fence_wait” This reverts commit
07ed11afb68d94eadd4ffc082b97c2331307c5ea. Stephen Rostedt reports: “I went
to run my tests on my VMs and the tests hung on boot up. Unfortunately, the
most I ever got out was: [ 93.607888] Testing event system initcall: OK [
93.667730] Running tests on all trace events: [ 93.669757] Testing all
events: OK [ 95.631064] ------------[ cut here ]------------ Timed out
after 60 seconds” and further debugging points to a possible circular
locking dependency between the console_owner locking and the worker pool
locking. Reverting the commit allows Steve’s VM to boot to completion
again. [ This may obviously result in the “[TTM] Buffer eviction failed”
messages again, which was the reason for that original revert. But at this
point this seems preferable to a non-booting system… ]