I can confirm that the debdiff from #2 fixes the issue. Thank you. I will upload a bugfixed package to my LTS PPA https://launchpad.net/~r0lf/+archive/ubuntu/stable
** Description changed: [IMPACT] umount.davfs consistently segfault in focal. This leads to a number of medium severity issues. - inability to unmount (this might have security implications) - inability to remount - autofs fails to unmount - reports of higher load in multi-user environments - computer "hangs" on shutdown waiting for successful umount completion [TEST CASE] No need for a specific test case, simply mount a resource via davfs2.mount. Calling umount.davfs2 on that mount in focal will result in a segfault every time. Exit code 255 and failure is recorded in syslog. The mount stays mounted. To verify the fix from #2 which is the backport of the fix from upstream, simply recompile davfs2 and try the procedure once more to see if the problem has been solved. [REGRESSION POTENTIAL] I will leave this mostly to others to evaluate. Currently, umount.davfs2 is completely dysfunctional so it's hard to imagine a regression for a binary that isn't doing anything except segfaulting. [OTHER INFO] groovy and later versions have already been fixed via a new upstream release. Upstream discussion of the a and m mixup can be found at the - links below. - + links below. Duplicate bug 1859293 also has some very good background. [ORIGINAL REPORT] I am getting segfaults everytime I want to unmount my webdav online- space (segfault error 4). Hardware failure is impossible as I see - because error already reported on project page (and fixed). Error should be fixed in davfs 1.5.6 (Maybe easiest to bump to version 1.5.6 on ubuntu repos ?) :) See (line 4-6): http://cvs.savannah.nongnu.org/viewvc/davfs2/davfs2/ChangeLog?revision=1.156&view=markup&pathrev=MAIN See 2: https://savannah.nongnu.org/bugs/?func=detailitem&item_id=56286#options EDIT: Using Ubuntu 20.04 x64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883025 Title: [focal SRU] davfs2 unable to unmount: segfault error 4 in libc.so To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/davfs2/+bug/1883025/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
