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| author | Denis V. Lunev <den@openvz.org> | 2008-04-03 13:33:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-03 13:33:00 -0700 |
| commit | 84f59370c519449c70dcc813b050f5cbbf0098e7 (patch) | |
| tree | 247917a098519394b08c52334d6eacc949f10848 /net/ipv6 | |
| parent | eb867579311a9c1e998d6911af056772c400122a (diff) | |
| download | op-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')
| -rw-r--r-- | net/ipv6/anycast.c | 9 |
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; |
