Public bug reported: Kernel version 3.19, currently being used as the vivid LTS kernel, includes support for ipvlan. But at its current state it is unusable as simply removing an interface with an ip address attached will cause a kernel crash. The fix is already upstream:
https://github.com/torvalds/linux/commit/27705f7085ce2e124fac4c280ce824962cc90bb6 Reproducing this is easy (requires a recent version of iproute2, with support for ipvlan, such as the one in debian/experimental): ip netns add ns0 ip link add link eth0 ipvl0 type ipvlan mode L3 ip link set dev ipvl0 netns ns0 ip netns exec ns0 bash ip link set dev ipvl0 up ip -4 addr add 192.168.0.10/24 dev ipvl0 ip link del dev ipvl0 The last line will cause a kernel crash, with a calltrace that looks like this: https://gist.github.com/fabiokung/b360cb2f3bdf2fb36c8b Can we get the fixes backported to the 3.19 LTS kernel from vivid? Ideally we would like to have the whole patchset backported: https://github.com/torvalds/linux/commit/d91e9015c78af1dc1f8ac4fdcf6118dbc2401668 and https://github.com/torvalds/linux/commit/8172ba51e257fdd353010cd7caaa37c8bc9eb44a ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Description changed: - Kernel version 3.19, currently in the vivid LTS kernel, includes support - for ipvlan. But at its current state it is almost unusable as simply - removing an interface with an ip address attached will cause a kernel - crash. The fix is already upstream: + Kernel version 3.19, currently being used an the vivid LTS kernel, + includes support for ipvlan. But at its current state it is unusable as + simply removing an interface with an ip address attached will cause a + kernel crash. The fix is already upstream: https://github.com/torvalds/linux/commit/27705f7085ce2e124fac4c280ce824962cc90bb6 Reproducing this is easy (requires a recent version of iproute2, with support for ipvlan, such as the one in debian/experimental): ip netns add ns0 ip link add link eth0 ipvl0 type ipvlan mode L3 ip link set dev ipvl0 netns ns0 ip netns exec ns0 bash ip link set dev ipvl0 up ip -4 addr add 192.168.0.10/24 dev ipvl0 ip link del dev ipvl0 The last line will cause a kernel crash, with a calltrace that looks like this: https://gist.github.com/fabiokung/b360cb2f3bdf2fb36c8b Can we get the fixes backported to the 3.19 LTS kernel from vivid? Ideally we would like to have the whole patchset backported: https://github.com/torvalds/linux/commit/d91e9015c78af1dc1f8ac4fdcf6118dbc2401668 and https://github.com/torvalds/linux/commit/8172ba51e257fdd353010cd7caaa37c8bc9eb44a -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to iproute2 in Ubuntu. https://bugs.launchpad.net/bugs/1475434 Title: ipvlan module causes kernel crashes (backport fixes from upstream) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1475434/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
