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| author | David S. Miller <davem@davemloft.net> | 2019-10-05 13:37:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-10-05 13:37:23 -0700 |
| commit | 6f4c930e02355664d89c976eccea5d999a90de16 (patch) | |
| tree | bc08932fbf43b9560ba5bde3284674054e3b56eb /net/ipv6/ip6_input.c | |
| parent | 26e0105550862a137eba701e2f4e3eeb343759e9 (diff) | |
| parent | 2d00aee21a5d4966e086d98f9d710afb92fb14e8 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Diffstat (limited to 'net/ipv6/ip6_input.c')
| -rw-r--r-- | net/ipv6/ip6_input.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index d432d0011c16..3d71c7d6102c 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -223,6 +223,16 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev, if (ipv6_addr_is_multicast(&hdr->saddr)) goto err; + /* While RFC4291 is not explicit about v4mapped addresses + * in IPv6 headers, it seems clear linux dual-stack + * model can not deal properly with these. + * Security models could be fooled by ::ffff:127.0.0.1 for example. + * + * https://tools.ietf.org/html/draft-itojun-v6ops-v4mapped-harmful-02 + */ + if (ipv6_addr_v4mapped(&hdr->saddr)) + goto err; + skb->transport_header = skb->network_header + sizeof(*hdr); IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr); @@ -371,7 +381,7 @@ resubmit_final: /* Free reference early: we don't need it any more, and it may hold ip_conntrack module loaded indefinitely. */ - nf_reset(skb); + nf_reset_ct(skb); skb_postpull_rcsum(skb, skb_network_header(skb), skb_network_header_len(skb)); |