diff options
| author | stephen hemminger <stephen@networkplumber.org> | 2013-07-13 17:18:18 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-07-17 19:51:19 (GMT) |
| commit | fe5c3561e6f0ac7c9546209f01351113c1b77ec8 (patch) | |
| tree | 0482e0c7d8cb06a053f4b16b3ba5bc301d89536f | |
| parent | f45708209dc445bac0844f6ce86e315a2ffe8a29 (diff) | |
| download | linux-fe5c3561e6f0ac7c9546209f01351113c1b77ec8.tar.xz | |
vxlan: add necessary locking on device removal
The socket management is now done in workqueue (outside of RTNL)
and protected by vn->sock_lock. There were two possible bugs, first
the vxlan device was removed from the VNI hash table per socket without
holding lock. And there was a race when device is created and the workqueue
could run after deletion.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/vxlan.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 0ba1e7e..a5ba8dd 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -1767,9 +1767,15 @@ static int vxlan_newlink(struct net *net, struct net_device *dev, static void vxlan_dellink(struct net_device *dev, struct list_head *head) { + struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); struct vxlan_dev *vxlan = netdev_priv(dev); + flush_workqueue(vxlan_wq); + + spin_lock(&vn->sock_lock); hlist_del_rcu(&vxlan->hlist); + spin_unlock(&vn->sock_lock); + list_del(&vxlan->next); unregister_netdevice_queue(dev, head); } |