diff options
Diffstat (limited to 'net/ipv4/ip_input.c')
| -rw-r--r-- | net/ipv4/ip_input.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index d52c9da644cf..d274078b1665 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -146,7 +146,7 @@ #include <linux/netlink.h> /* - * Process Router Attention IP option + * Process Router Attention IP option (RFC 2113) */ int ip_call_ra_chain(struct sk_buff *skb) { @@ -155,8 +155,7 @@ int ip_call_ra_chain(struct sk_buff *skb) struct sock *last = NULL; struct net_device *dev = skb->dev; - read_lock(&ip_ra_lock); - for (ra = ip_ra_chain; ra; ra = ra->next) { + for (ra = rcu_dereference(ip_ra_chain); ra; ra = rcu_dereference(ra->next)) { struct sock *sk = ra->sk; /* If socket is bound to an interface, only report @@ -167,10 +166,8 @@ int ip_call_ra_chain(struct sk_buff *skb) sk->sk_bound_dev_if == dev->ifindex) && net_eq(sock_net(sk), dev_net(dev))) { if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) { - if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN)) { - read_unlock(&ip_ra_lock); + if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN)) return 1; - } } if (last) { struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); @@ -183,10 +180,8 @@ int ip_call_ra_chain(struct sk_buff *skb) if (last) { raw_rcv(last, skb); - read_unlock(&ip_ra_lock); return 1; } - read_unlock(&ip_ra_lock); return 0; } |