Eric Dumazet e688a60480 net: introduce DST_NOPEER dst flag ... Chris Boot reported crashes occurring in ipv6_select_ident(). [ 461.457562] RIP: 0010:[<ffffffff812dde61>] [<ffffffff812dde61>] ipv6_select_ident+0x31/0xa7 [ 461.578229] Call Trace: [ 461.580742] <IRQ> [ 461.582870] [<ffffffff812efa7f>] ? udp6_ufo_fragment+0x124/0x1a2 [ 461.589054] [<ffffffff812dbfe0>] ? ipv6_gso_segment+0xc0/0x155 [ 461.595140] [<ffffffff812700c6>] ? skb_gso_segment+0x208/0x28b [ 461.601198] [<ffffffffa03f236b>] ? ipv6_confirm+0x146/0x15e [nf_conntrack_ipv6] [ 461.608786] [<ffffffff81291c4d>] ? nf_iterate+0x41/0x77 [ 461.614227] [<ffffffff81271d64>] ? dev_hard_start_xmit+0x357/0x543 [ 461.620659] [<ffffffff81291cf6>] ? nf_hook_slow+0x73/0x111 [ 461.626440] [<ffffffffa0379745>] ? br_parse_ip_options+0x19a/0x19a [bridge] [ 461.633581] [<ffffffff812722ff>] ? dev_queue_xmit+0x3af/0x459 [ 461.639577] [<ffffffffa03747d2>] ? br_dev_queue_push_xmit+0x72/0x76 [bridge] [ 461.646887] [<ffffffffa03791e3>] ? br_nf_post_routing+0x17d/0x18f [bridge] [ 461.653997] [<ffffffff81291c4d>] ? nf_iterate+0x41/0x77 [ 461.659473] [<ffffffffa0374760>] ? br_flood+0xfa/0xfa [bridge] [ 461.665485] [<ffffffff81291cf6>] ? nf_hook_slow+0x73/0x111 [ 461.671234] [<ffffffffa0374760>] ? br_flood+0xfa/0xfa [bridge] [ 461.677299] [<ffffffffa0379215>] ? nf_bridge_update_protocol+0x20/0x20 [bridge] [ 461.684891] [<ffffffffa03bb0e5>] ? nf_ct_zone+0xa/0x17 [nf_conntrack] [ 461.691520] [<ffffffffa0374760>] ? br_flood+0xfa/0xfa [bridge] [ 461.697572] [<ffffffffa0374812>] ? NF_HOOK.constprop.8+0x3c/0x56 [bridge] [ 461.704616] [<ffffffffa0379031>] ? nf_bridge_push_encap_header+0x1c/0x26 [bridge] [ 461.712329] [<ffffffffa037929f>] ? br_nf_forward_finish+0x8a/0x95 [bridge] [ 461.719490] [<ffffffffa037900a>] ? nf_bridge_pull_encap_header+0x1c/0x27 [bridge] [ 461.727223] [<ffffffffa0379974>] ? br_nf_forward_ip+0x1c0/0x1d4 [bridge] [ 461.734292] [<ffffffff81291c4d>] ? nf_iterate+0x41/0x77 [ 461.739758] [<ffffffffa03748cc>] ? __br_deliver+0xa0/0xa0 [bridge] [ 461.746203] [<ffffffff81291cf6>] ? nf_hook_slow+0x73/0x111 [ 461.751950] [<ffffffffa03748cc>] ? __br_deliver+0xa0/0xa0 [bridge] [ 461.758378] [<ffffffffa037533a>] ? NF_HOOK.constprop.4+0x56/0x56 [bridge] This is caused by bridge netfilter special dst_entry (fake_rtable), a special shared entry, where attaching an inetpeer makes no sense. Problem is present since commit 87c48fa3b4 (ipv6: make fragment identifications less predictable) Introduce DST_NOPEER dst flag and make sure ipv6_select_ident() and __ip_select_ident() fallback to the 'no peer attached' handling. Reported-by: Chris Boot <bootc@bootc.net> Tested-by: Chris Boot <bootc@bootc.net> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-12-22 22:34:56 -05:00
..
netfilter	netfilter: Remove NOTRACK/RAW dependency on NETFILTER_ADVANCED.	2011-11-23 16:07:00 -05:00
af_inet.c	ipv4: compat_ioctl is local to af_inet.c, make it static	2011-10-19 19:24:39 -04:00
ah4.c	ah: Don't return NET_XMIT_DROP on input.	2011-11-12 18:13:32 -05:00
arp.c	neigh: Pass neighbour entry to output ops.	2011-07-17 23:11:17 -07:00
cipso_ipv4.c	cipso: remove an unneeded NULL check in cipso_v4_doi_add()	2011-10-11 18:43:53 -04:00
datagram.c	ipv4: Lock socket and use cork flow in ip4_datagram_connect().	2011-05-08 13:48:57 -07:00
devinet.c	ipv4: flush route cache after change accept_local	2011-12-01 21:46:12 -05:00
esp4.c	inet: constify ip headers and in6_addr	2011-04-22 11:04:14 -07:00
fib_frontend.c	rtnetlink: Compute and store minimum ifinfo dump size	2011-06-09 20:38:07 -07:00
fib_lookup.h	ipv4: Fix nexthop caching wrt. scoping.	2011-03-24 18:06:47 -07:00
fib_rules.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
fib_semantics.c	ipv4: Fix fib_info->fib_metrics leak	2011-09-16 17:42:26 -04:00
fib_trie.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
gre.c	rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER	2011-08-02 04:29:23 -07:00
icmp.c	net: more accurate skb truesize	2011-10-13 16:05:07 -04:00
igmp.c	ipv4 : igmp : fix error handle in ip_mc_add_src()	2011-11-23 17:31:39 -05:00
inet_connection_sock.c	seqlock: Get rid of SEQLOCK_UNLOCKED	2011-05-24 15:22:17 +02:00
inet_diag.c	net-netlink: fix diag to export IPv4 tos for dual-stack IPv6 sockets	2011-11-22 16:03:10 -05:00
inet_fragment.c
inet_hashtables.c	net: Compute protocol sequence numbers and fragment IDs using MD5.	2011-08-06 18:33:19 -07:00
inet_lro.c	net: add skb frag size accessors	2011-10-19 03:10:46 -04:00
inet_timewait_sock.c	net: Fix files explicitly needing to include module.h	2011-10-31 19:30:28 -04:00
inetpeer.c	net: Compute protocol sequence numbers and fragment IDs using MD5.	2011-08-06 18:33:19 -07:00
ip_forward.c	ipv4: Save nexthop address of LSRR/SSRR option to IPCB.	2011-11-23 19:19:32 -05:00
ip_fragment.c	net: add skb frag size accessors	2011-10-19 03:10:46 -04:00
ip_gre.c	ip_gre: dont increase dev->needed_headroom on a live device	2011-10-20 16:20:30 -04:00
ip_input.c	ip: introduce ip_is_fragment helper inline function	2011-06-21 20:33:34 -07:00
ip_options.c	ipv4: Save nexthop address of LSRR/SSRR option to IPCB.	2011-11-23 19:19:32 -05:00
ip_output.c	ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT	2011-10-24 03:06:21 -04:00
ip_sockglue.c	net: use INET_ECN_MASK instead of hardcoded 3	2011-10-22 00:07:47 -04:00
ipcomp.c	inet: constify ip headers and in6_addr	2011-04-22 11:04:14 -07:00
ipconfig.c	net: have ipconfig not wait if no dev is available	2011-12-20 14:09:15 -05:00
ipip.c	ipip, sit: copy parms.name after register_netdevice	2011-12-12 18:50:51 -05:00
ipmr.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
Kconfig
Makefile	net: ipv4: add IPPROTO_ICMP socket kind	2011-05-13 16:08:13 -04:00
netfilter.c	netfilter: possible unaligned packet header in ip_route_me_harder	2011-11-21 18:46:18 +01:00
ping.c	ping: dont increment ICMP_MIB_INERRORS	2011-11-18 14:38:59 -05:00
proc.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
protocol.c
raw.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
route.c	net: introduce DST_NOPEER dst flag	2011-12-22 22:34:56 -05:00
syncookies.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
sysctl_net_ipv4.c	inetpeer: remove unused list	2011-06-08 17:05:30 -07:00
tcp_bic.c
tcp_cong.c
tcp_cubic.c	tcp_cubic: limit delayed_ack ratio to prevent divide error	2011-05-08 15:51:57 -07:00
tcp_diag.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c	tcp: add const qualifiers where possible	2011-10-21 05:22:42 -04:00
tcp_ipv4.c	tcp: clear xmit timers in tcp_v4_syn_recv_sock()	2011-11-16 16:57:45 -05:00
tcp_lp.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
tcp_minisocks.c	ipv6: tcp: fix TCLASS value in ACK messages sent from TIME_WAIT	2011-10-27 00:44:35 -04:00
tcp_output.c	tcp: Fix comments for Nagle algorithm	2011-11-08 14:02:47 -05:00
tcp_probe.c
tcp_scalable.c
tcp_timer.c	TCP: remove TCP_DEBUG	2011-10-24 17:36:08 -04:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
tcp.c	TCP: remove TCP_DEBUG	2011-10-24 17:36:08 -04:00
tunnel4.c
udp_impl.h
udp.c	Revert "udp: remove redundant variable"	2011-12-01 14:12:55 -05:00
udplite.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
xfrm4_input.c
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c	xfrm4: Don't call icmp_send on local error	2011-07-01 17:33:19 -07:00
xfrm4_policy.c	ipv4: fix ipsec forward performance regression	2011-10-24 03:01:22 -04:00
xfrm4_state.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
xfrm4_tunnel.c