Hi, I have followed the steps from comment #27 and I was able to reproduce the issue with bionic kernel 4.15.0-44-generic. I applied the suggested fix (f19f5c49bbc3 x86/speculation/l1tf: Exempt zeroed PTEs from inversion) and confirmed that it fixes the issue.
An SRU request has been sent with the fix and it's on the way of being applied: https://lists.ubuntu.com/archives/kernel-team/2019-February/098327.html ** Changed in: linux (Ubuntu Bionic) Status: Confirmed => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799237 Title: mprotect fails on ext4 with dax To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1799237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
