diff options
| author | David S. Miller | 2015-06-08 20:06:56 -0700 |
|---|---|---|
| committer | David S. Miller | 2015-06-08 20:06:56 -0700 |
| commit | 941742f49762ba4c908510f036b09a46c1b14513 (patch) | |
| tree | aafb7a72c2072f98889406668003234bed56df02 /net/ipv4 | |
| parent | ac7ba51c215db5739eb640f2f26025ced8668285 (diff) | |
| parent | 5879ae5fd052a63d5ac0684320cb7df3e83da7de (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/udp.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 1c92ea67baef..83aa604f9273 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -90,6 +90,7 @@ #include <linux/socket.h> #include <linux/sockios.h> #include <linux/igmp.h> +#include <linux/inetdevice.h> #include <linux/in.h> #include <linux/errno.h> #include <linux/timer.h> @@ -1960,6 +1961,7 @@ void udp_v4_early_demux(struct sk_buff *skb) struct sock *sk; struct dst_entry *dst; int dif = skb->dev->ifindex; + int ours; /* validate the packet */ if (!pskb_may_pull(skb, skb_transport_offset(skb) + sizeof(struct udphdr))) @@ -1969,14 +1971,24 @@ void udp_v4_early_demux(struct sk_buff *skb) uh = udp_hdr(skb); if (skb->pkt_type == PACKET_BROADCAST || - skb->pkt_type == PACKET_MULTICAST) + skb->pkt_type == PACKET_MULTICAST) { + struct in_device *in_dev = __in_dev_get_rcu(skb->dev); + + if (!in_dev) + return; + + ours = ip_check_mc_rcu(in_dev, iph->daddr, iph->saddr, + iph->protocol); + if (!ours) + return; sk = __udp4_lib_mcast_demux_lookup(net, uh->dest, iph->daddr, uh->source, iph->saddr, dif); - else if (skb->pkt_type == PACKET_HOST) + } else if (skb->pkt_type == PACKET_HOST) { sk = __udp4_lib_demux_lookup(net, uh->dest, iph->daddr, uh->source, iph->saddr, dif); - else + } else { return; + } if (!sk) return; |