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netfilter: nf_ct_sip: handle non-linear skbs

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Handle non-linear skbs by linearizing them instead of silently failing.
Long term the helper should be fixed to either work with non-linear skbs
directly by using the string search API or work on a copy of the data.

Based on patch by Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Patrick McHardy 2010-05-14 21:18:17 +02:00
parent 736d58e3a2
commit a1d7c1b4b8
1 changed files with 4 additions and 8 deletions
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12
net/netfilter/nf_conntrack_sip.c
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@ -1393,10 +1393,8 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff,
nf_ct_refresh(ct, skb, sip_timeout * HZ);
if (skb_is_nonlinear(skb)) {
pr_debug("Copy of skbuff not supported yet.\n");
return NF_ACCEPT;
}
if (unlikely(skb_linearize(skb)))
return NF_DROP;
dptr = skb->data + dataoff;
datalen = skb->len - dataoff;
@ -1455,10 +1453,8 @@ static int sip_help_udp(struct sk_buff *skb, unsigned int protoff,
nf_ct_refresh(ct, skb, sip_timeout * HZ);
if (skb_is_nonlinear(skb)) {
pr_debug("Copy of skbuff not supported yet.\n");
return NF_ACCEPT;
}
if (unlikely(skb_linearize(skb)))
return NF_DROP;
dptr = skb->data + dataoff;
datalen = skb->len - dataoff;