diff options
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/br_netfilter_ipv6.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/bridge/br_netfilter_ipv6.c b/net/bridge/br_netfilter_ipv6.c index 6b07f30675bb..afd1c718b683 100644 --- a/net/bridge/br_netfilter_ipv6.c +++ b/net/bridge/br_netfilter_ipv6.c @@ -45,14 +45,18 @@ */ static int br_nf_check_hbh_len(struct sk_buff *skb) { - unsigned char *raw = (u8 *)(ipv6_hdr(skb) + 1); + int len, off = sizeof(struct ipv6hdr); + unsigned char *nh; u32 pkt_len; - const unsigned char *nh = skb_network_header(skb); - int off = raw - nh; - int len = (raw[1] + 1) << 3; - if ((raw + len) - skb->data > skb_headlen(skb)) + if (!pskb_may_pull(skb, off + 8)) goto bad; + nh = (unsigned char *)(ipv6_hdr(skb) + 1); + len = (nh[1] + 1) << 3; + + if (!pskb_may_pull(skb, off + len)) + goto bad; + nh = skb_network_header(skb); off += 2; len -= 2; |