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ipvlan: ignore addresses from ipv6 autoconfiguration 

Inet6addr notifier is atomic and runs in bh context without RTNL when
ipv6 receives router advertisement packet and performs autoconfiguration.

Proper fix still in discussion. Let's at least plug the bug.
v1: http://lkml.kernel.org/r/20150514135618.14062.1969.stgit@buzz
v2: http://lkml.kernel.org/r/20150703125840.24121.91556.stgit@buzz

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Konstantin Khlebnikov 2015-07-14 16:35:55 +03:00 committed by David S. Miller
parent 0fba37a3af
commit 23a5a49c83
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ipvlan/ipvlan_main.c
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@ -655,6 +655,10 @@ static int ipvlan_addr6_event(struct notifier_block *unused,
struct net_device *dev = (struct net_device *)if6->idev->dev;
struct ipvl_dev *ipvlan = netdev_priv(dev);
/* FIXME IPv6 autoconf calls us from bh without RTNL */
if (in_softirq())
return NOTIFY_DONE;
if (!netif_is_ipvlan(dev))
return NOTIFY_DONE;