diff options
Diffstat (limited to 'net/ipv4/igmp.c')
| -rw-r--r-- | net/ipv4/igmp.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index c6247fc8406..c04607b4921 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -872,11 +872,18 @@ int igmp_rcv(struct sk_buff *skb) return 0; } - if (!pskb_may_pull(skb, sizeof(struct igmphdr)) || - (u16)csum_fold(skb_checksum(skb, 0, len, 0))) { - in_dev_put(in_dev); - kfree_skb(skb); - return 0; + if (!pskb_may_pull(skb, sizeof(struct igmphdr))) + goto drop; + + switch (skb->ip_summed) { + case CHECKSUM_HW: + if (!(u16)csum_fold(skb->csum)) + break; + /* fall through */ + case CHECKSUM_NONE: + skb->csum = 0; + if (__skb_checksum_complete(skb)) + goto drop; } ih = skb->h.igmph; @@ -906,6 +913,8 @@ int igmp_rcv(struct sk_buff *skb) default: NETDEBUG(KERN_DEBUG "New IGMP type=%d, why we do not know about it?\n", ih->type); } + +drop: in_dev_put(in_dev); kfree_skb(skb); return 0; |