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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