touch-packages team mailing list archive

[Fabio Kung <1475434@xxxxxxxxxxxxxxxxxx>]

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
Touch seeded packages, which is subscribed to iproute2 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

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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