On Mon, 22 Apr 2024 09:33:11 -0400 Peter Xu <peterx@xxxxxxxxxx> wrote: > Userfaultfd unregister includes a step to remove wr-protect bits from all > the relevant pgtable entries, but that only covered an explicit > UFFDIO_UNREGISTER ioctl, not a close() on the userfaultfd itself. Cover > that too. We should include a description of the userspace-visible effects of the bug, please. Always. I see it triggers a WARN, but so what - why ca't we simply delete the WARN statement if that's the only effect? Presumably there are other consequences - what are they? Also, a WARN-triggering bug should be fixed in -stable kernels so we'll need a FIXES:, please?
