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authorDenis V. Lunev <den@openvz.org>2008-04-03 13:33:00 -0700
committerDavid S. Miller <davem@davemloft.net>2008-04-03 13:33:00 -0700
commit84f59370c519449c70dcc813b050f5cbbf0098e7 (patch)
tree247917a098519394b08c52334d6eacc949f10848 /net/ipv6/anycast.c
parenteb867579311a9c1e998d6911af056772c400122a (diff)
downloadop-kernel-dev-84f59370c519449c70dcc813b050f5cbbf0098e7.zip
op-kernel-dev-84f59370c519449c70dcc813b050f5cbbf0098e7.tar.gz
[IPV6]: Fix refcounting for anycast dst entries.
Anycast DST entries allocated inside ipv6_dev_ac_inc are leaked when network device is stopped without removing IPv6 addresses from it. The bug has been observed in the reality on 2.6.18-rhel5 kernel. In the above case addrconf_ifdown marks all entries as obsolete and ip6_del_rt called from __ipv6_dev_ac_dec returns ENOENT. The referrence is not dropped. The fix is simple. DST entry should not keep referrence when stored in the FIB6 tree. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/anycast.c')
-rw-r--r--net/ipv6/anycast.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 9c7f83f..e5f56c9 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -334,9 +334,7 @@ int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
idev->ac_list = aca;
write_unlock_bh(&idev->lock);
- dst_hold(&rt->u.dst);
- if (ip6_ins_rt(rt))
- dst_release(&rt->u.dst);
+ ip6_ins_rt(rt);
addrconf_join_solict(dev, &aca->aca_addr);
@@ -378,10 +376,7 @@ int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr)
addrconf_leave_solict(idev, &aca->aca_addr);
dst_hold(&aca->aca_rt->u.dst);
- if (ip6_del_rt(aca->aca_rt))
- dst_free(&aca->aca_rt->u.dst);
- else
- dst_release(&aca->aca_rt->u.dst);
+ ip6_del_rt(aca->aca_rt);
aca_put(aca);
return 0;
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