[NETFILTER]: nf_conntrack_ipv6: fix incorrect classification of IPv6 fragments as...

The individual fragments of a packet reassembled by conntrack have the
conntrack reference from the reassembled packet attached, but nfctinfo
is not copied. This leaves it initialized to 0, which unfortunately is
the value of IP_CT_ESTABLISHED.

The result is that all IPv6 fragments are tracked as ESTABLISHED,
allowing them to bypass a usual ruleset which accepts ESTABLISHED
packets early.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index 6f19c4a495607bf3be1bfabb374a43cda011eb7a..d1102455668d43db1ba803253df51bc92b583235 100644 (file)
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -257,6 +257,7 @@ static unsigned int ipv6_conntrack_in(unsigned int hooknum,
                }
                nf_conntrack_get(reasm->nfct);
                (*pskb)->nfct = reasm->nfct;
+               (*pskb)->nfctinfo = reasm->nfctinfo;
                return NF_ACCEPT;
        }