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authorDavid S. Miller <davem@davemloft.net>2011-01-04 11:57:25 -0800
committerDavid S. Miller <davem@davemloft.net>2011-01-04 11:57:25 -0800
commitdbbe68bb12b34f3e450da7a73c20e6fa1f85d63a (patch)
tree10f8363cbf5e428c0cb5614959e37b67a7e0cfa2 /net/bridge/br_multicast.c
parent7b26e5ebd8b27b0126a84ae7f9a42aa8293d6c48 (diff)
parent9fc3bbb4a752f108cf096d96640f3b548bbbce6c (diff)
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.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index f03e2e98cd4..f701a21acb3 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