An issue was discovered in include/asm-generic/tlb.h in the Linux kernel before 5.19. Because of a race condition (unmap_mapping_range versus munmap), a device driver can free a page while it still has stale TLB entries. This only occurs in situations with VM_PFNMAP VMAs.
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 2130158]
This was fixed for Fedora with the 5.19 kernel rebases.