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ip6_gre: only increase err_count for some certain type icmpv6 in ip6gre_err

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[ Upstream commit f8d20b46ce ]

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: c12b395a46 ("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>
This commit is contained in:
Xin Long
2017-10-26 19:23:27 +08:00
committed by Greg Kroah-Hartman
parent 93b12f202a
commit 5c8a0850ba
1 changed files with 7 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
net/ipv6/ip6_gre.c
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@@ -409,13 +409,16 @@ 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)
@@ -431,13 +434,13 @@ 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;
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))