Public bug reported: [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. ** Affects: linux (Ubuntu) Importance: Undecided Status: Fix Released ** Affects: linux (Ubuntu Bionic) Importance: Medium Assignee: Thadeu Lima de Souza Cascardo (cascardo) Status: In Progress ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Bionic) Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo) ** Changed in: linux (Ubuntu Bionic) Status: New => In Progress ** Changed in: linux (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: In Progress 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1968340/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp