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netfilter: flowtable: refresh timeout after dst and writable checks

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Refresh the timeout (and retry hardware offload) once the skbuff dst
is confirmed to be current and after the skbuff is made writable.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso
2021-03-17 15:56:40 +01:00
parent e5075c0bad
commit 1b9cd7690a
1 changed files with 4 additions and 4 deletions
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8
net/netfilter/nf_flow_table_ip.c
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@@ -246,8 +246,6 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
if (nf_flow_state_check(flow, iph->protocol, skb, thoff))
return NF_ACCEPT;
flow_offload_refresh(flow_table, flow);
if (!dst_check(&rt->dst, 0)) {
flow_offload_teardown(flow);
return NF_ACCEPT;
@@ -256,6 +254,8 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
if (skb_try_make_writable(skb, thoff + hdrsize))
return NF_DROP;
flow_offload_refresh(flow_table, flow);
iph = ip_hdr(skb);
nf_flow_nat_ip(flow, skb, thoff, dir, iph);
@@ -466,8 +466,6 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
sizeof(*ip6h)))
return NF_ACCEPT;
flow_offload_refresh(flow_table, flow);
if (!dst_check(&rt->dst, 0)) {
flow_offload_teardown(flow);
return NF_ACCEPT;
@@ -476,6 +474,8 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
if (skb_try_make_writable(skb, sizeof(*ip6h) + hdrsize))
return NF_DROP;
flow_offload_refresh(flow_table, flow);
ip6h = ipv6_hdr(skb);
nf_flow_nat_ipv6(flow, skb, dir, ip6h);