[Crash]: Ubuntu 24.04 LTS - Core dump exit-code 133 about desktop HOT 7 OPEN

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

from desktop.

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

from desktop.

@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

from desktop.

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

from desktop.

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

from desktop.

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>
}

from desktop.

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 :)

from desktop.