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authorKonstantin Khlebnikov <khlebnikov@yandex-team.ru>2015-07-14 16:35:55 +0300
committerDavid S. Miller <davem@davemloft.net>2015-07-15 21:33:40 -0700
commit23a5a49c83dd8a7201a42e96d24238bde3547c11 (patch)
treeeeface61303e1c46b5472d1aeab3b148f19736b9 /drivers/net/ipvlan
parent0fba37a3af03a7e74bf9e75473729adb98da49c3 (diff)
downloadlinux-23a5a49c83dd8a7201a42e96d24238bde3547c11.tar.bz2
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>
Diffstat (limited to 'drivers/net/ipvlan')
-rw-r--r--drivers/net/ipvlan/ipvlan_main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index e995bc501ee6..20b58bdecf75 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -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;