diff options
| author | Bart De Schuymer <bdschuym@pandora.be> | 2005-12-19 14:00:08 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-12-19 14:00:08 -0800 |
| commit | b03664869aa6f84c3c98a06ac9d6905b195909bc (patch) | |
| tree | 222958ab671d7a0493f530bfe3243c119f7c01fe | |
| parent | 6b80ebedbee87c5b2213fc3635bf0bd7450bce30 (diff) | |
[BRIDGE-NF]: Fix bridge-nf ipv6 length check
A typo caused some bridged IPv6 packets to get dropped randomly,
as reported by Sebastien Chaumontet. The patch below fixes this
(using skb->nh.raw instead of raw) and also makes the jumbo packet
length checking up-to-date with the code in
net/ipv6/exthdrs.c::ipv6_hop_jumbo.
Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/bridge/br_netfilter.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index d8e36b77512..43a0b35dfe6 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -295,7 +295,7 @@ static int check_hbh_len(struct sk_buff *skb) len -= 2; while (len > 0) { - int optlen = raw[off+1]+2; + int optlen = skb->nh.raw[off+1]+2; switch (skb->nh.raw[off]) { case IPV6_TLV_PAD0: @@ -308,18 +308,15 @@ static int check_hbh_len(struct sk_buff *skb) case IPV6_TLV_JUMBO: if (skb->nh.raw[off+1] != 4 || (off&3) != 2) goto bad; - pkt_len = ntohl(*(u32*)(skb->nh.raw+off+2)); - + if (pkt_len <= IPV6_MAXPLEN || + skb->nh.ipv6h->payload_len) + goto bad; if (pkt_len > skb->len - sizeof(struct ipv6hdr)) goto bad; - if (pkt_len + sizeof(struct ipv6hdr) < skb->len) { - if (__pskb_trim(skb, - pkt_len + sizeof(struct ipv6hdr))) - goto bad; - if (skb->ip_summed == CHECKSUM_HW) - skb->ip_summed = CHECKSUM_NONE; - } + if (pskb_trim_rcsum(skb, + pkt_len+sizeof(struct ipv6hdr))) + goto bad; break; default: if (optlen > len) |