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[Xen-users] DomU does not start because the loopback interface could not

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Subject: [Xen-users] DomU does not start because the loopback interface could not be setup.
From: Andreas Madritsch <andreas.madritsch@xxxxxxxxx>
Date: Tue, 04 Nov 2008 14:28:54 +0100
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DomU does not start because the loopback interface could not be setup.
Could someone help me please. Following you will find the DomU's
configuration and console output.

memory = 512
name = "iscsi"
localtime = 1
vif = [ 'mac=00:16:3e:f5:e9:2b, bridge=xenbr0' ]
kernel = "/boot/vmlinuz-xen"
ramdisk = "/boot/my-initrd-xen"
root = "/dev/hda"
disk = [ 'phy:/dev/iscsi,hda,w' ]

idpcam1:/home/amadrits # xm create iscsi -c
Using config file "/etc/xen/vm/iscsi".
Started domain iscsi
Linux version (geeko@buildhost) (gcc version 4.1.2
20061115 (prerelease) (SUSE Linux)) #1 SMP Mon Jul 7 23:46:38 CEST 2008
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000020800000 (usable)
0MB HIGHMEM available.
520MB LOWMEM available.
ACPI in unprivileged domain disabled
Allocating PCI resources starting at 30000000 (gap: 20800000:df800000)
Xen reported: 2211.326 MHz processor.
Built 1 zonelists.  Total pages: 133120
Kernel command line:  root=/dev/hda
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 16384 bytes)
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Software IO TLB disabled
vmalloc area: e1000000-fb7fe000, maxmem 33ffe000
Memory: 507392k/532480k available (2252k kernel code, 16500k reserved,
1057k data, 196k init, 0k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 5530.25 BogoMIPS
Security Framework v1.0.0 initialized
Mount-cache hash table entries: 512
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 512K (64 bytes/line)
Compat vDSO mapped to fbffd000.
Checking 'hlt' instruction... OK.
SMP alternatives: switching to UP code
Freeing SMP alternatives: 16k freed
checking if image is initramfs... it is
Freeing initrd memory: 6480k freed
Brought up 1 CPUs
Grant table initialized
NET: Registered protocol family 16
Brought up 1 CPUs
PCI: setting up Xen PCI frontend stub
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
xen_mem: Initialising balloon driver.
Setting mem allocation to 524288 kiB
PCI: System does not support PCI
PCI: System does not support PCI
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
audit: initializing netlink socket (disabled)
audit(1225807455.927:1): initialized
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
rtc: IRQ 8 is not free.
Floppy drive(s): fd0 is unknown type 15 (usb?), fd1 is unknown type 15
Failed to obtain physical IRQ 6
floppy0: no floppy controllers found
RAMDISK driver initialized: 16 RAM disks of 64000K size 1024 blocksize
Xen virtual console successfully installed as tty1
Event-channel device installed.
netfront: Initialising virtual ethernet driver.
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
NET: Registered protocol family 1
Using IPI No-Shortcut mode
Time: xen clocksource has been installed.
netfront: device eth0 has flipping receive path.
XENBUS: Device with no driver: device/vbd/768
Freeing unused kernel memory: 196k freed
Boot logging started on /dev/tty1(/dev/console) at Tue Nov  4 14:04:19 2008
Creating device nodes with udev
netfront: Initialising virtual ethernet driver.
kobject_add failed for vif with -EEXIST, don't try to register things
with the same name in the same directory.
 [<c020daca>] kobject_add+0x11a/0x1a0
 [<c020dc71>] kobject_register+0x21/0x50
 [<c0275b4d>] bus_add_driver+0x7d/0x140
 [<c028852b>] xenbus_register_driver_common+0x2b/0x40
 [<c0288580>] xenbus_register_frontend+0x20/0x40
 [<c013b7db>] sys_init_module+0x15b/0x1c40
 [<c0104f73>] syscall_call+0x7/0xb
Loading xennet
Loading xenblk
Registering block device major 3
blkfront: hda: barriers enabled
 hda: unknown partition table
ata_id[570]: main: HDIO_GET_IDENTITY failed for '/dev/.tmp-3-0'
Loading jbd
Loading mbcache
Loading ext3
Waiting for device /dev/hda to appear:  ok
fsck 1.39 (29-May-2006)
[/bin/fsck.ext3 (1) -- /] fsck.ext3 -a -C0 /dev/hda
/dev/hda: recovering journal
/dev/hda: Superblock last mount time is in the future.  FIXED.
/dev/hda has gone 49710 days without being checked, check forced.
/dev/hda: 57272/524288 files (0.1% non-contiguous), 410679/1048576 blocks
fsck succeeded. Mounting root device read-write.
Mounting root /dev/hda
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
INIT: version 2.86 booting
System Boot Control: Running /etc/init.d/boot
Mounting procfs at /proc                                             done
Mounting sysfs at /sys                                               done
Mounting debugfs at /sys/kernel/debug                                done
Initializing /dev                                                    done
Mounting devpts at /dev/pts                                          done
Boot logging started on /dev/tty1(/dev/console (deleted)) at Tue Nov  4
15:04:54 2008
Starting udevd ata_id[664]: main: HDIO_GET_IDENTITY failed for
Activating swap-devices in /etc/fstab...                             done
EXT3 FS on hda, internal journal
Loading required kernel modules                                      done
Activating device mapper...
device-mapper: ioctl: 4.7.0-ioctl (2006-06-24) initialised:
Starting MD Raid                                                     done
Waiting for udev to settle...
Scanning for LVM volume groups...
  Reading all physical volumes.  This may take a while...
  No volume groups found
  No volume groups found
Activating LVM volume groups...
  No volume groups found
Checking file systems...
fsck 1.39 (29-May-2006)                                              done
Mounting local file systems...
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
debugfs on /sys/kernel/debug type debugfs (rw)
udev on /dev type tmpfs (rw)
loop: loaded (max 8 devices)
devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
nothing was mounted                                                  done
Creating /var/log/boot.msg                                           done
Setting current sysctl status from /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.conf.all.rp_filter = 1
Enabling syn flood protection                                        done
Disabling IP forwarding                                              done
Setting up hostname 'idvmam1'                                        done
Setting up loopback interface     lo
BUG: unable to handle kernel NULL pointer dereference at virtual address
 printing eip:
*pde = ma 00000000 pa fffff000
Oops: 0000 [#1]
last sysfs file: /class/net/lo/address
Modules linked in: loop dm_mod ext3 mbcache jbd xenblk
CPU:    0
EIP:    0061:[<00000000>]    Not tainted VLI
EFLAGS: 00010286   ( #1)
EIP is at _stext+0x3fefe000/0x60
eax: e1025760   ebx: e1025760   ecx: c0464700   edx: 00000001
esi: 00000000   edi: c0464700   ebp: 00000001   esp: c1799e20
ds: 007b   es: 007b   ss: 0069
Process ip (pid: 1169, ti=c1798000 task=c086d6b0 task.ti=c1798000)
Stack: c012c3b5 c03fd0d8 c0464700 00000001 00000001 c012c795 c0464700
       c0925080 c02fc835 00000001 c0169c3c 00000001 00000001 c03f0a90
       c02fcf17 00000000 00000000 00000000 00000000 00000000 c0dac6c0
Call Trace:
 [<c012c3b5>] notifier_call_chain+0x25/0x30
 [<c012c795>] blocking_notifier_call_chain+0x25/0x40
 [<c02fc835>] inet_insert_ifa+0xa5/0x130
 [<c0169c3c>] kmem_cache_zalloc+0x8c/0xb0
 [<c02fcf17>] inetdev_event+0x2e7/0x300
 [<c02c064c>] rtmsg_ifinfo+0xac/0xe0
 [<c012c3b5>] notifier_call_chain+0x25/0x30
 [<c02b906a>] dev_open+0x6a/0x70
 [<c02b7445>] dev_change_flags+0x55/0x120
 [<c02fda02>] devinet_ioctl+0x502/0x700
 [<c02b8bbb>] dev_ifsioc+0xeb/0x360
 [<c02121e4>] copy_to_user+0x34/0x70
 [<c02aca85>] sock_ioctl+0x115/0x220
 [<c02ac970>] sock_ioctl+0x0/0x220
 [<c018064b>] do_ioctl+0x2b/0x90
 [<c018070c>] vfs_ioctl+0x5c/0x2b0
 [<c01809d2>] sys_ioctl+0x72/0x90
 [<c0104f73>] syscall_call+0x7/0xb
Code:  Bad EIP value.
EIP: [<00000000>] _stext+0x3fefe000/0x60 SS:ESP 0069:c1799e20
 /sbin/ifup: line 1060:  1169 Segmentation fault      ip link set up dev
Cannot enable interface lo.

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