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bridge: use br_port_get_rtnl within rtnl lock

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current br_port_get_rcu is problematic in bridging path
(NULL deref). Change these calls in netlink path first.

Signed-off-by: Hong Zhiguo <zhiguohong@tencent.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hong Zhiguo
2013-09-14 22:42:27 +08:00
committed by David S. Miller
parent 3274f68752
commit 1fb1754a8c
2 changed files with 3 additions and 3 deletions
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net/bridge/br_netlink.c
+2 -2
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@@ -207,7 +207,7 @@ int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
struct net_device *dev, u32 filter_mask)
{
int err = 0;
struct net_bridge_port *port = br_port_get_rcu(dev);
struct net_bridge_port *port = br_port_get_rtnl(dev);
/* not a bridge port and */
if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
@@ -451,7 +451,7 @@ static size_t br_get_link_af_size(const struct net_device *dev)
struct net_port_vlans *pv;
if (br_port_exists(dev))
pv = nbp_get_vlan_info(br_port_get_rcu(dev));
pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
else if (dev->priv_flags & IFF_EBRIDGE)
pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
else