diff options
| author | Xin Long <lucien.xin@gmail.com> | 2017-10-26 19:23:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-18 11:22:23 +0100 |
| commit | 6d428bc40a426d0802ba09aab9e4091ccf26200e (patch) | |
| tree | 443792b4b840eb71f0f3f49ba2b3d9f19f0842e2 | |
| parent | df0eebcea8e5af01fa4366a49179e1d72f6b8117 (diff) | |
ip6_gre: only increase err_count for some certain type icmpv6 in ip6gre_err
[ Upstream commit f8d20b46ce55cf40afb30dcef6d9288f7ef46d9b ]
The similar fix in patch 'ipip: only increase err_count for some
certain type icmp in ipip_err' is needed for ip6gre_err.
In Jianlin's case, udp netperf broke even when receiving a TooBig
icmpv6 packet.
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/ip6_gre.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 41c10486cf7e..d083d3c25475 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -408,13 +408,16 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, case ICMPV6_DEST_UNREACH: net_dbg_ratelimited("%s: Path to destination invalid or inactive!\n", t->parms.name); - break; + if (code != ICMPV6_PORT_UNREACH) + break; + return; case ICMPV6_TIME_EXCEED: if (code == ICMPV6_EXC_HOPLIMIT) { net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n", t->parms.name); + break; } - break; + return; case ICMPV6_PARAMPROB: teli = 0; if (code == ICMPV6_HDR_FIELD) @@ -430,7 +433,7 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, net_dbg_ratelimited("%s: Recipient unable to parse tunneled packet!\n", t->parms.name); } - break; + return; case ICMPV6_PKT_TOOBIG: mtu = be32_to_cpu(info) - offset - t->tun_hlen; if (t->dev->type == ARPHRD_ETHER) @@ -438,7 +441,7 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; t->dev->mtu = mtu; - break; + return; } if (time_before(jiffies, t->err_time + IP6TUNNEL_ERR_TIMEO)) |