diff mbox series

[5.4,124/155] netfilter: flowtable: reload ip{v6}h in nf_flow_tuple_ip{v6}

Message ID 20200331085432.265404774@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman March 31, 2020, 8:59 a.m. UTC 
From: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>

commit 41e9ec5a54f95eee1a57c8d26ab70e0492548c1b upstream.

Since pskb_may_pull may change skb->data, so we need to reload ip{v6}h at
the right place.

Fixes: a908fdec3dda ("netfilter: nf_flow_table: move ipv6 offload hook code to nf_flow_table")
Fixes: 7d2086871762 ("netfilter: nf_flow_table: move ipv4 offload hook code to nf_flow_table")
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/netfilter/nf_flow_table_ip.c |    2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -189,6 +189,7 @@  static int nf_flow_tuple_ip(struct sk_bu
 	if (!pskb_may_pull(skb, thoff + sizeof(*ports)))
 		return -1;
 
+	iph = ip_hdr(skb);
 	ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
 
 	tuple->src_v4.s_addr	= iph->saddr;
@@ -449,6 +450,7 @@  static int nf_flow_tuple_ipv6(struct sk_
 	if (!pskb_may_pull(skb, thoff + sizeof(*ports)))
 		return -1;
 
+	ip6h = ipv6_hdr(skb);
 	ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
 
 	tuple->src_v6		= ip6h->saddr;