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 unnecessary OOM logging messages	2011-11-01 09:19:49 +01:00
Kconfig	net: bridge builtin vs. ipv6 modular	2011-03-10 13:45:57 -08:00
Makefile	bridge: Add core IGMP snooping support	2010-02-28 00:48:45 -08:00
br.c	bridge: allow creating bridge devices with netlink	2011-04-04 17:22:28 -07:00
br_device.c	Merge branch 'master' of github.com:davem330/net	2011-10-07 13:38:43 -04:00
br_fdb.c	bridge: allow updating existing fdb entries	2011-10-03 12:17:33 -04:00
br_forward.c	net: bridge: check the length of skb after nf_bridge_maybe_copy_header()	2011-01-06 11:33:05 -08:00
br_if.c	Merge branch 'master' of ra.kernel.org:/pub/scm/linux/kernel/git/davem/net	2011-10-24 18:18:09 -04:00
br_input.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
br_ioctl.c	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-04-11 13:44:25 -07:00
br_multicast.c	bridge: correct IPv6 checksum after pull	2011-11-16 17:32:43 -05:00
br_netfilter.c	net: introduce DST_NOPEER dst flag	2011-12-22 22:34:56 -05:00
br_netlink.c	bridge: master device stuck in no-carrier state forever when in user-stp mode	2011-12-01 14:05:17 -05:00
br_notify.c	Bridge: Always send NETDEV_CHANGEADDR up on br MAC change.	2011-08-09 21:44:44 -07:00
br_private.h	Merge branch 'master' of ra.kernel.org:/pub/scm/linux/kernel/git/davem/net	2011-10-24 18:18:09 -04:00
br_private_stp.h	bridge: minor cleanups	2011-07-22 17:01:13 -07:00
br_stp.c	bridge: master device stuck in no-carrier state forever when in user-stp mode	2011-12-01 14:05:17 -05:00
br_stp_bpdu.c	bridge: minor cleanups	2011-07-22 17:01:13 -07:00
br_stp_if.c	net: fix implicit kmod.h usage in bridge/br_stp_if.c	2011-10-31 19:30:30 -04:00
br_stp_timer.c	bridge: add notification over netlink when STP changes state	2011-07-22 17:01:12 -07:00
br_sysfs_br.c	bridge: allow forwarding some link local frames	2011-10-06 15:27:56 -04:00
br_sysfs_if.c	bridge: range check STP parameters	2011-04-04 17:22:29 -07:00