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[BRIDGE-NF]: Fix bridge-nf ipv6 length check

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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>
This commit is contained in:
Bart De Schuymer 2005-12-19 14:00:08 -08:00 committed by David S. Miller
parent 6b80ebedbe
commit b03664869a
1 changed files with 7 additions and 10 deletions
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17
net/bridge/br_netfilter.c
View file

@ -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)