From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 11/30] ipvs: ensure that ICMP cannot be sent in reply to ICMP
Date: Tue, 22 Sep 2015 11:14:01 +0200 [thread overview]
Message-ID: <1442913260-3925-12-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1442913260-3925-1-git-send-email-pablo@netfilter.org>
From: Alex Gartrell <agartrell@fb.com>
Check the header for icmp before sending a PACKET_TOO_BIG
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
---
net/netfilter/ipvs/ip_vs_xmit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index af5e9d3..c5be055 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -224,7 +224,7 @@ static inline bool ensure_mtu_is_adequate(int skb_af, int rt_mode,
if (!skb->dev)
skb->dev = net->loopback_dev;
/* only send ICMP too big on first fragment */
- if (!ipvsh->fragoffs)
+ if (!ipvsh->fragoffs && !ip_vs_iph_icmp(ipvsh))
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
IP_VS_DBG(1, "frag needed for %pI6c\n",
&ipv6_hdr(skb)->saddr);
@@ -242,7 +242,8 @@ static inline bool ensure_mtu_is_adequate(int skb_af, int rt_mode,
return true;
if (unlikely(ip_hdr(skb)->frag_off & htons(IP_DF) &&
- skb->len > mtu && !skb_is_gso(skb))) {
+ skb->len > mtu && !skb_is_gso(skb) &&
+ !ip_vs_iph_icmp(ipvsh))) {
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
htonl(mtu));
IP_VS_DBG(1, "frag needed for %pI4\n",
--
1.7.10.4
next prev parent reply other threads:[~2015-09-22 9:14 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-22 9:13 [PATCH 00/30] Netfilter/IPVS updates for net-next Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 01/30] ipvs: replace ip_vs_fill_ip4hdr with ip_vs_fill_iph_skb_off Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 02/30] ipvs: Add hdr_flags to iphdr Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 03/30] ipvs: Handle inverse and icmp headers in ip_vs_leave Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 04/30] ipvs: pull out ip_vs_try_to_schedule function Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 05/30] ipvs: drop inverse argument to conn_{in,out}_get Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 06/30] ipvs: Make ip_vs_schedule aware of inverse iph'es Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 07/30] ipvs: add schedule_icmp sysctl Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 08/30] ipvs: Use outer header in ip_vs_bypass_xmit_v6 Pablo Neira Ayuso
2015-09-22 9:13 ` [PATCH 09/30] ipvs: sh: support scheduling icmp/inverse packets consistently Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 10/30] ipvs: attempt to schedule icmp packets Pablo Neira Ayuso
2015-09-22 9:14 ` Pablo Neira Ayuso [this message]
2015-09-22 9:14 ` [PATCH 12/30] ipvs: support scheduling inverse and icmp TCP packets Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 13/30] ipvs: support scheduling inverse and icmp UDP packets Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 14/30] ipvs: support scheduling inverse and icmp SCTP packets Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 15/30] ipvs: add sysctl to ignore tunneled packets Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 16/30] netfilter: ebtables: Simplify the arguments to ebt_do_table Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 17/30] inet netfilter: Remove hook from ip6t_do_table, arp_do_table, ipt_do_table Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 18/30] inet netfilter: Prefer state->hook to ops->hooknum Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 19/30] netfilter: nf_tables: kill nft_pktinfo.ops Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 20/30] netfilter: x_tables: Pass struct net in xt_action_param Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 21/30] netfilter: x_tables: Use par->net instead of computing from the passed net devices Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 22/30] netfilter: nf_tables: Pass struct net in nft_pktinfo Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 23/30] netfilter: nf_tables: Use pkt->net instead of computing net from the passed net_devices Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 24/30] netfilter: Pass net to nf_dup_ipv4 and nf_dup_ipv6 Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 25/30] act_connmark: Remember the struct net instead of guessing it Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 26/30] netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 27/30] ipvs: Read hooknum from state rather than ops->hooknum Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 28/30] netfilter: Pass priv instead of nf_hook_ops to netfilter hooks Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 29/30] netfilter: Pass net into nf_xfrm_me_harder Pablo Neira Ayuso
2015-09-22 9:14 ` [PATCH 30/30] netfilter: Use nf_ct_net instead of dev_net(out) in nf_nat_masquerade_ipv6 Pablo Neira Ayuso
2015-09-22 20:12 ` [PATCH 00/30] Netfilter/IPVS updates for net-next David Miller
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