** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1968340
Title:
ip6gre driver does not hold device reference
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Committed
Bug description:
[Impact]
When creating ip6gre interfaces in network namespaces, device references are
not held, preventing further network namespaces from being created.
[Test case]
sudo modprobe ip6_gre
unshare -Urn true
unshare -Urn true
The second unshare won't work and there will be "unregister_netdevice:
waiting for ip6gre0 to become free. Usage count = -1" messages on
kernel log.
[Potential regression]
ip6gre users can observe regressions.
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