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net: fix two lockdep splats 

Commit e67f88dd12 (net: dont hold rtnl mutex during netlink dump
callbacks) switched rtnl protection to RCU, but we forgot to adjust two
rcu_dereference() lockdep annotations :

inet_get_link_af_size() or inet_fill_link_af() might be called with
rcu_read_lock or rtnl held, so use rcu_dereference_rtnl()
instead of rtnl_dereference()

Reported-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-05-09 20:55:03 -07:00 committed by David S. Miller
parent 8f01cb0827
commit 1fc19aff84
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/devinet.c
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@ -1369,7 +1369,7 @@ errout:
static size_t inet_get_link_af_size(const struct net_device *dev)
{
struct in_device *in_dev = __in_dev_get_rtnl(dev);
struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr);
if (!in_dev)
return 0;
@ -1379,7 +1379,7 @@ static size_t inet_get_link_af_size(const struct net_device *dev)
static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
{
struct in_device *in_dev = __in_dev_get_rtnl(dev);
struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr);
struct nlattr *nla;
int i;