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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-06-20 21:42:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 11:37:18 +0300 |
| commit | 2417da3f4d6bc4fc6c77f613f0e2264090892aa5 (patch) | |
| tree | edc4ba9419c1685842e2c28b90e1bd5099ecfc6a /net/vmw_vsock | |
| parent | 5c2607d3e7cd8d1e4ee96fdc8d18d49a57f9500f (diff) | |
| download | linux-2417da3f4d6bc4fc6c77f613f0e2264090892aa5.tar.xz | |
ipv6: only call ip6_route_dev_notify() once for NETDEV_UNREGISTER
commit 76da0704507bbc51875013f6557877ab308cfd0a upstream.
In commit 242d3a49a2a1 ("ipv6: reorder ip6_route_dev_notifier after ipv6_dev_notf")
I assumed NETDEV_REGISTER and NETDEV_UNREGISTER are paired,
unfortunately, as reported by jeffy, netdev_wait_allrefs()
could rebroadcast NETDEV_UNREGISTER event until all refs are
gone.
We have to add an additional check to avoid this corner case.
For netdev_wait_allrefs() dev->reg_state is NETREG_UNREGISTERED,
for dev_change_net_namespace(), dev->reg_state is
NETREG_REGISTERED. So check for dev->reg_state != NETREG_UNREGISTERED.
Fixes: 242d3a49a2a1 ("ipv6: reorder ip6_route_dev_notifier after ipv6_dev_notf")
Reported-by: jeffy <jeffy.chen@rock-chips.com>
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/vmw_vsock')
0 files changed, 0 insertions, 0 deletions