[Crash]: Ubuntu 24.04 LTS - Core dump exit-code 133

[floviolleau]

Before you file a crash report

• I have checked the issue tracker and have not found an issue that matches the one I'm filing.
• This issue doesn't reproduce on web browsers (such as in Chrome). If it does, issue reports go to the Mattermost Server repository.
• I have read the contribution guidelines.

Mattermost Desktop Version

5.8.0

Operating System

Ubuntu Linux 24.04 LTS x64

Mattermost Server Version

9.7.2

What type of crash did you experience?

System crash (The application quit unexpectedly with no warning, or the operating system reported a crash)

Crash report details

Core dump at startup.

Same issue with tar.gz installation and from depots

I deleted ~/.config/Mattermost folder before trying

Log Output

>$ ./mattermost-desktop
[121301:0603/160936.923555:FATAL:credentials.cc(127)] Check failed: . : Permission denied (13)
[1]    121301 trace trap (core dumped)  ./mattermost-desktop

Additional Information

No response

[devinbinnie]

@floviolleau Is this consistently reproducible? Are you running as root or as a regular user?
Can you try the latest nightly build from here: https://community.mattermost.com/core/channels/desktop-builds

[floviolleau]

Hi,

I reproduce it all the time.

No root usage

I don't have account on mattermost community so I cannot download.

I think it is an issue with electron

[floviolleau]

Hi,

I found the workaround. The issue is for ALL Electron apps.

As a workaround for now, we must do sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0

Here for more information:
electron/electron#41066

[devinbinnie]

Good find! Closing this issue for now, will re-open if there's anything needed from our end.

[floviolleau]

Hi,

Sorry to add a new comment but you need to reopen the issue.

As mentioned in the issue linked with electron repository, this issue is caused by apparmor's default policy, which lacks a specific profile in the /etc/apparmor.d/ directory.

Mattermost installation need to add a profile in /etc/apparmor.d/ directory.

Here is an exemple from Matrix Element app:

# This profile allows everything and only exists to give the
# application a name instead of having the label "unconfined"

abi <abi/4.0>,
include <tunables/global>

profile element-desktop /opt/Element/element-desktop flags=(unconfined) {
  userns,

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

[devinbinnie]

Thanks for the insight, created a ticket here: https://mattermost.atlassian.net/browse/MM-59486

[devinbinnie]

Going to open this as HW as we probably won't get to work on this internally anytime soon. If anyone is open to making changes to get this working (perhaps writing a script to drop the profile where it needs to be) I can help guide/merge the changes :)