Mattermost-desktop ubuntu 24.04 FATAL:credentials.cc(127)] Check failed: . : Permission denied

Troubleshooting
1

Summary
mattermost-desktop 5.8.1 amd64 on ubuntu 24.04 won’t start with error message:
[225482:0712/133433.825721:FATAL:credentials.cc(127)] Check failed: . : Permission denied (13) Trace/breakpoint trap (core dumped)

Steps to reproduce
install mattermost-desktop from https://deb.packages.mattermost.com on ubuntu 24.04

Expected behavior
mattermost app starts

Observed behavior
error:
[225482:0712/133433.825721:FATAL:credentials.cc(127)] Check failed: . : Permission denied (13) Trace/breakpoint trap (core dumped)

Reasons: missing apparmor profile
Cf. https://ubuntu.com/blog/ubuntu-23-10-restricted-unprivileged-user-namespaces
Solution:
Create /etc/apparmor.d/mattermost-desktop :

abi <abi/4.0>,

include <tunables/global>

/opt/Mattermost/mattermost-desktop flags=(default_allow) {
  userns,

Site-specific additions and overrides. See local/README for details.
  include if exists <local/opt.Mattermost.mattermost-desktop>
}

And then do service apparmor reload.
It would be good to include this profile directly in the .deb

1 Like