netfilter: ipset: Skip really non-first fragments for IPv6 when getting port/protocol

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/netfilter/ipset/ip_set_getport.c b/net/netfilter/ipset/ip_set_getport.c
index 6fdf88ae2353..dac156f819ac 100644
--- a/net/netfilter/ipset/ip_set_getport.c
+++ b/net/netfilter/ipset/ip_set_getport.c
@@ -116,12 +116,12 @@ ip_set_get_ip6_port(const struct sk_buff *skb, bool src,
 {
         int protoff;
         u8 nexthdr;
-        __be16 frag_off;
+        __be16 frag_off = 0;
 
         nexthdr = ipv6_hdr(skb)->nexthdr;
         protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr,
                                    &frag_off);
-        if (protoff < 0)
+        if (protoff < 0 || (frag_off & htons(~0x7)) != 0)
                 return false;
 
         return get_port(skb, nexthdr, protoff, src, port, proto);