Kodi crashing

[mrpg]

BPO	46461
Nosy	@ericvsmith, @ajoino, @mrpg

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-01-21.17:40:00.731>
labels = ['3.9', 'type-crash']
title = 'Kodi crashing'
updated_at = <Date 2022-03-06.10:22:14.446>
user = 'https://github.com/mrpg'

bugs.python.org fields:

activity = <Date 2022-03-06.10:22:14.446>
actor = 'ajoino'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2022-01-21.17:40:00.731>
creator = 'mrpg'
dependencies = []
files = []
hgrepos = []
issue_num = 46461
keywords = []
message_count = 7.0
messages = ['411164', '411169', '411170', '411485', '414610', '414611', '414612']
nosy_count = 3.0
nosy_names = ['eric.smith', 'ajoino', 'mrpg']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue46461'
versions = ['Python 3.9']

[mrpg]

Dear Sir/Madam,

I was adviced to submitt an issue here, as the kodi team suggests its a problem with python.

i get this error in my syslog :

Jan 21 18:19:09 mediapc kernel: [ 14.478095] LanguageInvoker[1228]: segfault at 0 ip 00007fe50f704f45 sp 00007fe48d7f84e8 error 4 in libc-2.33.so[7fe50f5ab000+16b000]

Link to thread on Kodi forum :

https://forum.kodi.tv/showthread.php?tid=363499

Best Regards
Patric

[mrpg]

EDIT, just upgraded to ubuntu 21.10 and now use python 3.10.0 , same issue.

[ericvsmith]

Without a way to reproduce this, we won't be able to help you.

Ideally you would provide a python script, which we could run, which shows the problem. It would be best if there were no third party packages involved, but if there are, you should provide instructions on how to set up a virtual environment that includes whatever software you need.

[mrpg]

Hi,
Its reproducible, but not very fast or easy :

1 Install Ubuntu 21.04 or 21.10

2 Install kodi 19 from ppa : https://launchpad.net/~team-xbmc/+archive/ubuntu/ppa

3 install aeon nox silvo, and customized the skin and kodi settings

4 install plugins youtube,svtplay,retrospect,formula1,DR TV,iplayer www,netflix,Discovery plus, pvr simple client

[mrpg]

any update on this?
can i do something more to help?

BR
Patric

[ericvsmith]

I don’t have Ubuntu to test on. Plus the steps to reproduce are too much for the average volunteer to work through. I don’t think we’ll be able to help.

[ajoino]

From Kodi GH issues, they suspect is related to the work on subinterpreters xbmc/xbmc#19961 (comment):

"The bulk of this issue is due to how python and it's modules handle sub interpreters.
There are several open python bpos and have been many prs to cpython to handle sub interpreters better, but it's still very much a work in progress.

All C modules are/were being updated to what they call multi phase init, which essentially moves away from static init of members. Sub interpreters can modify these static members which can cause other sub interpreter states to crash horribly.

For the user with the SSL crash running python 3.9, if you go to 3.10, the SSL module was converted to multiphase init, and shouldn't crash in the same manner for that particular module. However not all modules are converted still, so there are still failure points on other modules.

This is a cpython issue, and there's not much we can do but wait for it to be resolved in cpython"

[comrade-meowski]

I don’t have Ubuntu to test on. Plus the steps to reproduce are too much for the average volunteer to work through. I don’t think we’ll be able to help.

I'm keen to chip in on this - I have tens of Kodi systems effected by this and they are all effectively unusable at this point.

We'll have to meet halfway on the reproducer I'm afraid, the issue is complex enough that a simple python script is not going to be enough to surface it as inconvenient as that may be for all of us. The good news is that the setup above is by no means necessary to trigger the faults so if any dev that's going to work on this can let me know the environment in which they'd prefer to test I will work on a much more reasonable reproducer.

In essence you need any Linux (Windows is not effected in my limited testing on that platform) host + Kodi 19.x + an addon. My specific use case is Linux (multiple architectures and distributions) + Kodi 19.x + the youtube and jellyfin addons. However both the youtube and jellyfin addons require a not-inconsiderable amount of pre-use configuration which I agree makes them not ideal candidates for triaging this. The "good" news here is that I'm pretty sure almost any addon or perhaps a combination of any two addons is sufficient to trigger the fault - I have spotted one candidate addon that aggressively autorefreshes it's state and seems capable of causing the fault on an otherwise vanilla Kodi install by itself with no user interaction required.

Please supply a preferred test environment for your purposes and I will provide as simple a reproducer as I can find.

[JelleZijlstra]

Is it possible to get a gdb traceback for the segfault? That should make it a lot easier to find the cause. On a quick look I didn't see any tracebacks here or in the linked Kodi forums thread.

[comrade-meowski]

That's a good point - I'll get started on it. Arch Linux x64 ok?