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| author | David S. Miller <davem@davemloft.net> | 2011-01-04 22:57:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-04 22:57:25 +0300 |
| commit | dbbe68bb12b34f3e450da7a73c20e6fa1f85d63a (patch) | |
| tree | 10f8363cbf5e428c0cb5614959e37b67a7e0cfa2 /net/bridge/br_multicast.c | |
| parent | 7b26e5ebd8b27b0126a84ae7f9a42aa8293d6c48 (diff) | |
| parent | 9fc3bbb4a752f108cf096d96640f3b548bbbce6c (diff) | |
| download | linux-dbbe68bb12b34f3e450da7a73c20e6fa1f85d63a.tar.xz | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'net/bridge/br_multicast.c')
| -rw-r--r-- | net/bridge/br_multicast.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index f03e2e98cd44..f701a21acb34 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1451,7 +1451,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, struct net_bridge_port *port, struct sk_buff *skb) { - struct sk_buff *skb2 = skb; + struct sk_buff *skb2; struct ipv6hdr *ip6h; struct icmp6hdr *icmp6h; u8 nexthdr; @@ -1490,15 +1490,15 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, if (!skb2) return -ENOMEM; + err = -EINVAL; + if (!pskb_may_pull(skb2, offset + sizeof(struct icmp6hdr))) + goto out; + len -= offset - skb_network_offset(skb2); __skb_pull(skb2, offset); skb_reset_transport_header(skb2); - err = -EINVAL; - if (!pskb_may_pull(skb2, sizeof(*icmp6h))) - goto out; - icmp6h = icmp6_hdr(skb2); switch (icmp6h->icmp6_type) { @@ -1537,7 +1537,12 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, switch (icmp6h->icmp6_type) { case ICMPV6_MGM_REPORT: { - struct mld_msg *mld = (struct mld_msg *)icmp6h; + struct mld_msg *mld; + if (!pskb_may_pull(skb2, sizeof(*mld))) { + err = -EINVAL; + goto out; + } + mld = (struct mld_msg *)skb_transport_header(skb2); BR_INPUT_SKB_CB(skb2)->mrouters_only = 1; err = br_ip6_multicast_add_group(br, port, &mld->mld_mca); break; @@ -1550,15 +1555,18 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, break; case ICMPV6_MGM_REDUCTION: { - struct mld_msg *mld = (struct mld_msg *)icmp6h; + struct mld_msg *mld; + if (!pskb_may_pull(skb2, sizeof(*mld))) { + err = -EINVAL; + goto out; + } + mld = (struct mld_msg *)skb_transport_header(skb2); br_ip6_multicast_leave_group(br, port, &mld->mld_mca); } } out: - __skb_push(skb2, offset); - if (skb2 != skb) - kfree_skb(skb2); + kfree_skb(skb2); return err; } #endif |