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OpenCloudOS-Kernel/net/ipv4/netfilter
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Florian Westphal 895162b110 netfilter: ipv4: defrag: set local_df flag on defragmented skb 
else we may fail to forward skb even if original fragments do fit
outgoing link mtu:

1. remote sends 2k packets in two 1000 byte frags, DF set
2. we want to forward but only see '2k > mtu and DF set'
3. we then send icmp error saying that outgoing link is 1500

But original sender never sent a packet that would not fit
the outgoing link.

Setting local_df makes outgoing path test size vs.
IPCB(skb)->frag_max_size, so we will still send the correct
error in case the largest original size did not fit
outgoing link mtu.

Reported-by: Maxime Bizon <mbizon@freebox.fr>
Suggested-by: Maxime Bizon <mbizon@freebox.fr>
Fixes: 5f2d04f1f9 (ipv4: fix path MTU discovery with connection tracking)
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
 		2014-05-04 13:23:28 +02:00
..
Kconfig netfilter: nft_reject: split up reject module into IPv4 and IPv6 specifc parts 2014-02-06 09:44:10 +01:00
Makefile netfilter: nft_reject: split up reject module into IPv4 and IPv6 specifc parts 2014-02-06 09:44:10 +01:00
arp_tables.c netfilter: Can't fail and free after table replacement 2014-04-05 17:46:22 +02:00
arpt_mangle.c netfilter: arpt_mangle: fix return values of checkentry 2011-02-01 16:03:46 +01:00
arptable_filter.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
ip_tables.c netfilter: Can't fail and free after table replacement 2014-04-05 17:46:22 +02:00
ipt_CLUSTERIP.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2013-11-04 19:46:58 -05:00
ipt_ECN.c netfilter: xtables: substitute temporary defines by final name 2010-05-11 18:31:17 +02:00
ipt_MASQUERADE.c netfilter: nf_conntrack: don't send destroy events from iterator 2013-08-09 12:03:33 +02:00
ipt_REJECT.c netfilter: REJECT: separate reusable code 2013-12-30 15:04:41 +01:00
ipt_SYNPROXY.c netfilter: SYNPROXY target: restrict to INPUT/FORWARD 2013-12-11 11:30:25 +01:00
ipt_ULOG.c netfilter: ipt_ULOG: fix info leaks 2013-10-02 17:28:36 +02:00
ipt_ah.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
ipt_rpfilter.c ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif 2014-04-16 15:05:11 -04:00
iptable_filter.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
iptable_mangle.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
iptable_nat.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
iptable_raw.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
iptable_security.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
nf_conntrack_l3proto_ipv4.c netfilter: nf_conntrack: remove dead code 2014-01-03 23:41:37 +01:00
nf_conntrack_l3proto_ipv4_compat.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_proto_icmp.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_defrag_ipv4.c netfilter: ipv4: defrag: set local_df flag on defragmented skb 2014-05-04 13:23:28 +02:00
nf_nat_h323.c netfilter: nf_nat_h323: fix crash in nf_ct_unlink_expect_report() 2014-02-05 17:46:05 +01:00
nf_nat_l3proto_ipv4.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_pptp.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_nat_proto_gre.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_nat_proto_icmp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_snmp_basic.c netfilter: nf_nat_snmp_basic: fix duplicates in if/else branches 2014-02-14 11:37:36 +01:00
nf_tables_arp.c netfilter: nf_tables: rename nft_do_chain_pktinfo() to nft_do_chain() 2014-01-09 20:17:16 +01:00
nf_tables_ipv4.c netfilter: nf_tables: fix error path in the init functions 2014-01-09 23:25:48 +01:00
nft_chain_nat_ipv4.c netfilter: nf_tables: rename nft_do_chain_pktinfo() to nft_do_chain() 2014-01-09 20:17:16 +01:00
nft_chain_route_ipv4.c netfilter: nf_tables: rename nft_do_chain_pktinfo() to nft_do_chain() 2014-01-09 20:17:16 +01:00
nft_reject_ipv4.c netfilter: nf_tables: add reject module for NFPROTO_INET 2014-02-06 09:44:18 +01:00