** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: linux-lts-vivid (Ubuntu Trusty)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Trusty)
** Also affects: linux (Ubuntu Vivid)
Importance: Undecided
Status: New
** Also affects: linux-lts-vivid (Ubuntu Vivid)
Importance: Undecided
Status: New
** No longer affects: linux-lts-vivid (Ubuntu Vivid)
--
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/1475434
Title:
ipvlan module causes kernel crashes (backport fixes from upstream)
Status in linux package in Ubuntu:
Incomplete
Status in linux-lts-vivid package in Ubuntu:
Confirmed
Status in linux-lts-vivid source package in Trusty:
New
Status in linux source package in Vivid:
New
Bug description:
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
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