nody-greeter --help outputs "segmentation fault (core dumped)"

[lgor360]

I decided to check this package for errors. I ran node-greeter --help, but got this error message. I went to the logs and saw...

kernel: audit: type=1400 audit(1732117727.597:180): apparmor="AUDIT" operation="userns_create" class="namespace" info="Userns create - transitioning profile" profile="unconfined" pid=12214 comm="nody-greeter" requested="userns_create" target="unprivileged_userns"

why. does --help have to be started from root?.. AND WHY --help COMMAND USER NAMES!?

[JezerM]

Lol, that shouldn't happen at all. There is no need to run nody-greeter as root, so this probably mean that the build process must have failed, probably the electron compilation with node-gtk.

Could you provide your build logs? (npm run build and share the output).

[lgor360]

Lol, that shouldn't happen at all. There is no need to run nody-greeter as root, so this probably mean that the build process must have failed, probably the electron compilation with node-gtk.

Could you provide your build logs? (npm run build and share the output).

okay
it just shows a message like "building models..... 0" for 5 minutes and then abruptly SUCCESS!
If all logs are needed, please advise whether to run only npm run rebuild or something else.

[JezerM]

A screenshot or the full log would be helpful.

[lgor360]

A screenshot or the full log would be helpful.

just npm run build?

[JezerM]

Yes. You could also try to remove the build/unpacked and build/nody-asar directories before npm run build.

[lgor360]

Yes. You could also try to remove the build/unpacked and build/nody-asar directories before npm run build.

logs.txt

here. please do not delete this issue :)

[JezerM]

Everything seems alright... Try to run npx electron . --help inside the nody-greeter repo. It should show something like this:

[JezerM]

If it doesn't work, then try to rebuild with npm run rebuild to rebuild electron with node-gtk. Afterwards, run npx electron . --help to check if it works.

[lgor360]

Everything seems alright... Try to run npx electron . --help inside the nody-greeter repo. It should show something like this:

wait... you mean... go to the folder with the cloned repository and run this command?... ok....

[JezerM]

Yes

[lgor360]

Yes

/home/USERNAME/nody-greeter/node_modules/electron/dist/electron exited with signal SIGSEGV

logs:
kernel: audit: type=1400 audit(1732174095.111:201): apparmor="AUDIT" operation="userns_create" class="namespace" info="Userns create - transitioning profile" profile="unconfined" pid=4273 comm="electron" requested="userns_create" target="unprivileged_userns"

I did some research online about SIGSEGV and it looks like it's the same segmentation fault... noooooooooooooooooooooo :[

[JezerM]

Hi, sorry for the late response, I've been busy...

So, I just looked for this issue and it seems it's an issue with recent versions of apparmor in Ubuntu 24.04+, where unknown namespaces like com.github.jezerm.nody-greeter are prohibited to be executed.

Here's an open issue on Electron's GitHub: electron/electron#41066

Currently, you can execute the following command to disable AppArmor unprivileged user namespaces restriction:

sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0

From my side, I'll try to add an AppArmor profile for nody-greeter (when I have the time to do so). Meanwhile, this issue will remain open.