diff options
| author | Sabrina Dubroca <sd@queasysnail.net> | 2015-02-04 15:25:09 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-05 00:33:10 -0800 |
| commit | d1e158e2d7a0a91110b206653f0e02376e809150 (patch) | |
| tree | efc05a10d97f7a793025ed11c5aceb620a149b16 | |
| parent | f31ec95fa19e07a8beebcc0297284f23aa57967e (diff) | |
| download | linux-d1e158e2d7a0a91110b206653f0e02376e809150.tar.bz2 | |
ip6_gre: fix endianness errors in ip6gre_err
info is in network byte order, change it back to host byte order
before use. In particular, the current code sets the MTU of the tunnel
to a wrong (too big) value.
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/ip6_gre.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 13cda4c6313b..01ccc28a686f 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -417,7 +417,7 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, if (code == ICMPV6_HDR_FIELD) teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data); - if (teli && teli == info - 2) { + if (teli && teli == be32_to_cpu(info) - 2) { tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli]; if (tel->encap_limit == 0) { net_warn_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n", @@ -429,7 +429,7 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, } break; case ICMPV6_PKT_TOOBIG: - mtu = info - offset; + mtu = be32_to_cpu(info) - offset; if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; t->dev->mtu = mtu; |