With that said... perhaps if you can reproduce this easily you could
reproduce with:
systemd.log_level=debug systemd.log_target=syslog systemd.dump_core=true
added to your kernel cmdline, and provide me related debug text.
And also, updating your systemd to latest in Focal:
245.4-4ubuntu3.2
and providing me the core dump from the user session abort() generated
by:
"Assertion 'set_remove(iterator->links, link) == link' failed at
src/shared/userdb.c:314, function userdb_on_query_reply(). Aborting.
Aborted (core dumped)"
That would help me out trying to identify the issue.
** Changed in: autofs (Ubuntu Focal)
Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned)
** Changed in: autofs (Ubuntu)
Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned)
** Also affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Changed in: autofs (Ubuntu Focal)
Status: New => Triaged
** Changed in: systemd (Ubuntu)
Status: New => Triaged
** Changed in: systemd (Ubuntu Focal)
Status: New => Triaged
** Changed in: autofs (Ubuntu Focal)
Importance: Medium => Undecided
** Changed in: autofs (Ubuntu)
Importance: Medium => Undecided
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https://bugs.launchpad.net/bugs/1880193
Title:
autofs: Assertion 'set_remove(iterator->links, link) == link' failed
at src/shared/userdb.c:314, function userdb_on_query_reply().
Aborting.
Status in autofs package in Ubuntu:
Triaged
Status in systemd package in Ubuntu:
Triaged
Status in autofs source package in Focal:
Triaged
Status in systemd source package in Focal:
Triaged
Bug description:
autofs has a periodic error on mounting shares in Ubuntu 20.04 (it happens
about 1 time out of 5):
"Assertion 'set_remove(iterator->links, link) == link' failed at
src/shared/userdb.c:314, function userdb_on_query_reply(). Aborting.
Aborted (core dumped)"
`autofs.service` restart (or `automount` app restart) fixes this
issue. However if some of home dirs (like `Desktop` or `Documents`)
are mounted by `autofs`, user can't login into Ubuntu Desktop
Environment (PC freezes on login with black screen). Since this error
can prevent user log in, it might be considered as critical bug.
It happens both in `autofs` systemd service and by direct execution of
`automount` app (`automount -f -d` command).
May be it's an underlying error in `systemd` library (I found the
line, mentioned in error, in its source codes).
This issue has place in Ubuntu 20.04 (it works correctly in Ubuntu
18.04):
> lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04
Packages versions:
> apt-cache policy autofs systemd
autofs:
Installed: 5.1.6-2
Candidate: 5.1.6-2
Version table:
*** 5.1.6-2 500
500 http://ru.archive.ubuntu.com/ubuntu focal/main amd64 Packages
100 /var/lib/dpkg/status
systemd:
Installed: 245.4-4ubuntu3
Candidate: 245.4-4ubuntu3
Version table:
*** 245.4-4ubuntu3 500
500 http://ru.archive.ubuntu.com/ubuntu focal/main amd64 Packages
100 /var/lib/dpkg/status
Steps to reproduce:
1. Ubuntu 20.04 clean install
2. `apt install realmd sssd sssd-tools libnss-sss libpam-sss adcli
samba-common-bin`
3. `realm join DOMAIN.NAME`
4. Enable makehomedir by command: `pam-auth-update`
5. `apt install cifs-utils`
6. `apt install autofs`
7. Add next line inside [domain/DOMAIN.EXT] section into /etc/sssd/sssd.conf:
`krb5_ccname_template = FILE:%d/krb5cc_%U`
8. Reboot
9. Login as domain user and try to open directory, mounted by `autofs` (in my
configuration shares are provided by AD).
10. `autofs.service` stops with the error above about 1 time out of 5 (not
always).
Found workaround:
Add `Restart=always` into `[Service]` section in
`/lib/systemd/system/autofs.service` file (in other words configure
auto-restart on failures for autofs service).
Attachments:
1. Full log of `automount -f -d` command.
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