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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Nicolas Dichtel, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1525324

** Package changed: linux-lts-trusty (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1525324

Title:
  kernel/bonding: wrong netlink messages when deleting a bonding
  interface

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Here is the bug:

  root@ubuntu1404:~# modprobe bonding
  root@ubuntu1404:~# modprobe dummy
  root@ubuntu1404:~# ip link set dummy0 master bond0
  root@ubuntu1404:~# ip monitor link&
  [1] 1065
  root@ubuntu1404:~# ip link del bond0
  Deleted 6: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group default 
      link/ether c2:46:53:08:ee:50 brd ff:ff:ff:ff:ff:ff
  7: dummy0: <BROADCAST,NOARP,SLAVE,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
      link/ether c2:46:53:08:ee:50 brd ff:ff:ff:ff:ff:ff
  7: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
      link/ether c2:46:53:08:ee:50 brd ff:ff:ff:ff:ff:ff
  6: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group default 
      link/ether e6:49:16:3b:17:fe brd ff:ff:ff:ff:ff:ff
  6: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group default 
  root@ubuntu1404:~#     link/ether e6:49:16:3b:17:fe brd ff:ff:ff:ff:ff:ff
  7: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noqueue state DOWN group default 
      link/ether c2:46:53:08:ee:50 brd ff:ff:ff:ff:ff:ff
  7: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noqueue state DOWN group default 
      link/ether c2:46:53:08:ee:50 brd ff:ff:ff:ff:ff:ff
  ^C
  root@ubuntu1404:~# uname -a
  Linux ubuntu1404 3.13.0-71-generic #114-Ubuntu SMP Tue Dec 1 02:34:22 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
  root@ubuntu1404:~#

  A netlink message advertise that bond0 is deleted and after that two
  netlink messages are sent telling that bond0 exists again.

  This bug has been fixed by these upstream commits:
  56bfa7ee7c88 unregister_netdevice : move RTM_DELLINK to until after ndo_uninit
  http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=56bfa7ee7c88
  395eea6ccf2b rtnetlink: delay RTM_DELLINK notification until after ndo_uninit()
  http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=395eea6ccf2b

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