Date:	Wed, 10 Jun 2009 20:35:36 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	netdev@...r.kernel.org
Subject: kernel dies if loopback device not intialized

This OOPS happens if system is booted up and loopback device
is not initialized. This means the loopback device is not yet in the
route table so when arp goes to send the error report, the route
lookup thinks it is a martian and then dies.

Granted this is a startup script problem, but kernel shouldn't die.

[   55.601158] IP: [<c028968c>] ip_handle_martian_source+0x75/0xb8
[   55.604044] Oops: 0000 [#1] SMP
[   55.604044] last sysfs file: /sys/kernel/uevent_seqnum
[   55.604044] Modules linked in: iptable_nat ip6table_filter
iptable_filter ip6table_raw ip6_tables xt_NOTRACK iptable_raw ip_tables
x_tables nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_h323
nf_conntrack_h323 nf_nat_sip nf_conntrack_sip nf_nat_proto_gre nf_nat_tftp
nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_tftp
nf_conntrack_ftp nf_conntrack ipv6 md_mod parport_pc parport psmouse
pcspkr serio_raw vmxnet container ac button i2c_piix4 i2c_core shpchp
pci_hotplug intel_agp agpgart evdev vfat fat ext2 battery squashfs loop
unionfs nls_utf8 isofs nls_base zlib_inflate ext3 jbd mbcache sd_mod sg
crc_t10dif sr_mod cdrom ata_piix pata_acpi floppy ata_generic mptspi
mptscsih mptbase scsi_transport_spi libata scsi_mod thermal processor fan
thermal_sys
[   55.604044]
[   55.604044] Pid: 0, comm: swapper Not tainted (2.6.29-1-586-vyatta #1)
VMware Virtual Platform
[   55.604044] EIP: 0060:[<c028968c>] EFLAGS: 00010293 CPU: 0
[   55.604044] EIP is at ip_handle_martian_source+0x75/0xb8
[   55.604044] EAX: 0000000e EBX: 00000000 ECX: c03e3d28 EDX: c03611e7
[   55.604044] ESI: ddc40000 EDI: fffffc00 EBP: 00000000 ESP: c03e3d28
[   55.604044]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[   55.604044] Process swapper (pid: 0, ti=c03e2000 task=c038533c
task.ti=c03e2000)
[   55.604044] Stack:
[   55.604044]  00000003 0100007f ffffffea c028c45b 1000000f 0100007f
00000000 00000003
[   55.604044]  00000246 0100007f de5e9180 00000004 dfa6c600 df24ea80
c03e3dcc c03e3d90
[   55.604044]  00000000 00000003 00000000 1000000f 0100007f 00000000
00000000 00000000
[   55.604044] Call Trace:
[   55.604044]  [<c028c45b>] ip_route_input+0xbf8/0xc20
[   55.604044]  [<c02ac0a9>] icmp_send+0x361/0x4c4
[   55.604044]  [<c0135a7e>] sched_clock_cpu+0x13f/0x14b
[   55.604044]  [<c011cf34>] update_rq_clock+0xe/0x1c
[   55.604044]  [<c0289174>] ipv4_link_failure+0x14/0x37
[   55.604044]  [<c02aa056>] arp_error_report+0x1c/0x24
[   55.604044]  [<c027a3ae>] neigh_timer_handler+0x1c4/0x282
[   55.604044]  [<c027a1ea>] neigh_timer_handler+0x0/0x282
[   55.604044]  [<c01298eb>] run_timer_softirq+0x139/0x191
[   55.604044]  [<c027a1ea>] neigh_timer_handler+0x0/0x282
[   55.604044]  [<c012680a>] __do_softirq+0x83/0x103
[   55.604044]  [<c01268bc>] do_softirq+0x32/0x36
[   55.604044]  [<c01269d7>] irq_exit+0x35/0x62
[   55.604044]  [<c010fbc4>] smp_apic_timer_interrupt+0x71/0x7b
[   55.604044]  [<c0103a48>] apic_timer_interrupt+0x28/0x30
[   55.604044]  [<c01085f0>] default_idle+0x2a/0x3d
[   55.604044]  [<c0102489>] cpu_idle+0x57/0x72
[   55.604044] Code: e8 a1 f1 04 00 83 c4 10 66 83 be d2 00 00 00 00 74 58
8b bf 98 00 00 00 85 ff 74 4e 68 e7 11 36 c0 31 db e8 7e f1 04 00 58 eb 29
<0f> b6 04 1f 50 68 c8 20 35 c0 e8 6c f1 04 00 0f b7 86 d2 00 00
[   55.604044] EIP: [<c028968c>] ip_handle_martian_source+0x75/0xb8 SS:ESP
0068:c03e3d28
[   55.604044] ---[ end trace bfa8f60b4b45cd60 ]---
[   55.604044] Kernel panic - not syncing: Fatal exception in interrupt
-- 
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