[lts94] Backport missing commit to fix userfaultfd kselftest hang#622

bmastbergen wants to merge 1 commit intociqlts9_4ctrliq/kernel-src-tree:ciqlts9_4from

bmastbergen_ciqlts9_4/userfaultfd_selftest_fixctrliq/kernel-src-tree:bmastbergen_ciqlts9_4/userfaultfd_selftest_fixCopy head branch name to clipboard