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ipvlan: protect against concurrent link removal 

Adding and removing to the 'ipvlans' list is already done using _rcu list
operations.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Benc 2015-03-28 19:13:23 +01:00 committed by David S. Miller
parent 27705f7085
commit 2afa650ce2
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ipvlan/ipvlan_core.c
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@ -193,7 +193,8 @@ static void ipvlan_multicast_frame(struct ipvl_port *port, struct sk_buff *skb,
if (skb->protocol == htons(ETH_P_PAUSE))
return;
list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
rcu_read_lock();
list_for_each_entry_rcu(ipvlan, &port->ipvlans, pnode) {
if (local && (ipvlan == in_dev))
continue;
@ -220,6 +221,7 @@ static void ipvlan_multicast_frame(struct ipvl_port *port, struct sk_buff *skb,
mcast_acct:
ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true);
}
rcu_read_unlock();
/* Locally generated? ...Forward a copy to the main-device as
* well. On the RX side we'll ignore it (wont give it to any