deadlock on namespace removal

Bug #1664679 reported by Christian Brauner
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
AppArmor
New
Undecided
Unassigned

Bug Description

Hi guys,

We've recently quite often hit a bug in AppArmor on namespace removal. It seems that in multi-threaded situations (e.g. creating, starting, and deleting a lot of containers in parallel) AppArmor gets stuck on namespace removal. I'm giving two links to two stacktraces after the issue has occurred:

Stacktrace 1:

https://paste.ubuntu.com/23996580/

Stacktrace 2:

https://paste.ubuntu.com/23968200/

Thanks for you help!
Christian

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