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| author | Eric W. Biederman | 2008-12-30 03:21:48 +0100 |
|---|---|---|
| committer | David S. Miller | 2008-12-30 03:21:48 +0100 |
| commit | 8eb79863962bbf18ebf648335e329bfd468432fa (patch) | |
| tree | bd700ccdbed8aee9c36d9a20d139fe577cda766a /Documentation | |
| parent | net: make xfrm_statistics_seq_show use generic snmp_fold_field (diff) | |
| download | kernel-qcow2-linux-8eb79863962bbf18ebf648335e329bfd468432fa.tar.gz kernel-qcow2-linux-8eb79863962bbf18ebf648335e329bfd468432fa.tar.xz kernel-qcow2-linux-8eb79863962bbf18ebf648335e329bfd468432fa.zip | |
netns: foreach_netdev_safe is insufficient in default_device_exit
During network namespace teardown we either move or delete
all of the network devices associated with a network namespace.
In the case of veth devices deleting one will also delete it's
pair device. If both devices are in the same network namespace
then for_each_netdev_safe is insufficient as next may point
to the second veth device we have deleted.
To avoid problems I do what we do in __rtnl_kill_links and
restart the scan of the device list, after we have deleted
a device.
Currently dev_change_netnamespace does not appear to suffer from
this problem, but wireless devices are also paired and likely
should be moved between network namespaces together. So I have
errored on the side of caution and restart the scan of the network
devices in that case as well.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions