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Old 12-15-2008, 08:32 AM
Taisuke Yamada
 
Default Bug#508773: linux-image-2.6.26-1-openvz-amd64: Oops in simfs module when accessing device over aufs

Package: linux-image-2.6.26-1-openvz-amd64
Version: 2.6.26-11
Severity: normal

I found script below to always lock up my system with oops from
simfs module (OpenVZ).

#!/bin/sh
mkdir dir.ro dir.rw dir
mount -t aufs -o br:dir.rw:dir.ro=ro none dir
# removing simfs will prevent system from crashing
#modprobe -r simfs
mknod dir/anydev c 100 100

I'm reporting this for linux-image-2.6.26-1-openvz-amd64 package
because it is simfs module (OpenVZ component) that's oopsing, and
rmmod'ing simfs stops this from happening. However, this could be
related to aufs (aufs-modules-2.6.26-1-openvz-amd64 package).

Following is a session log took over serial console.

# mkdir dir.ro dir.rw dir
# mount -t aufs -o br:dir.rw:dir.ro=ro none dir
# mknod dir/anydev c 100 100
[ 152.961748] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[ 152.964024] IP: [<ffffffffa02f8269>] :simfs:sim_systemcall+0x9b/0x272
[ 152.964024] PGD 1e81d067 PUD 1d993067 PMD 0
[ 152.964024] Oops: 0000 [1] SMP
[ 152.964024] CPU: 0
[ 152.964024] Modules linked in: simfs aufs exportfs vzethdev vznetdev vzrst vzcpt tun vzdquota vzmon vzdev xt_tcpudp xt_length ipt_ttl xt_tcpmss xt_TCPMSS iptable_mangle iptable_filter xt_multiport xt_limit xt_dscp ipt_REJECT ip_tables x_tables ipv6 bridge ext2 mbcache loop parport_pc parport snd_pcm snd_timer snd soundcore snd_page_alloc pcspkr psmouse serio_raw i2c_i801 i2c_core iTCO_wdt container button evdev xfs raid1 md_mod sd_mod ata_generic ide_pci_generic ahci libata scsi_mod dock jmicron ide_core ehci_hcd uhci_hcd e1000e thermal processor fanthermal_sys [last unloaded: simfs]
[ 152.964024] Pid: 2581, comm: mknod Not tainted 2.6.26-1-openvz-amd64 #1 036test001
[ 152.964024] RIP: 0010:[<ffffffffa02f8269>] [<ffffffffa02f8269>] :simfs:sim_systemcall+0x9b/0x272
[ 152.964024] RSP: 0018:ffff81001e937a28 EFLAGS: 00010246
[ 152.964024] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
[ 152.964024] RDX: 0000000000000064 RSI: ffff81001f4ab800 RDI: ffff81001e937bb8
[ 152.964024] RBP: ffff81001e937bb8 R08: ffff81001cd8c340 R09: ffff81001cd7b5b8
[ 152.964024] R10: ffff81001f4ab908 R11: 0000000000000001 R12: ffff81001e937b58
[ 152.964024] R13: 0000000000000000 R14: ffff81001cd8a290 R15: ffff81001cd8c340
[ 152.964024] FS: 00007f4e96a45770(0000) GS:ffffffff80534000(0000) knlGS:0000000000000000
[ 152.964024] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 152.964024] CR2: 0000000000000028 CR3: 000000001e93a000 CR4: 00000000000006e0
[ 152.964024] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 152.964024] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 152.964024] Process mknod (pid: 2581, veid=0, threadinfo ffff81001e936000, task ffff81001f8cd7d0)
[ 152.964024] Stack: ffff81001cd7fd88 ffffffff8031199f 0000000000000002 ffff81001cd7fcc0
[ 152.964024] 0000000000000202 ffffffffa0135c5b ffff81001e937b48 0000000000000008
[ 152.964024] ffff81001dd681c0 ffffffffa01591cb 0000000100000000 ffff81001e937bb8
[ 152.964024] Call Trace:
[ 152.964024] [<ffffffff8031199f>] ? __up_read+0x13/0x8a
[ 152.964024] [<ffffffffa0135c5b>] ? :xfs:xfs_iunlock+0x31/0x7c
[ 152.964024] [<ffffffffa01591cb>] ? :xfs:xfs_read+0x1ec/0x21a
[ 152.964024] [<ffffffff802a0ac2>] ? do_sync_read+0x0/0x10c
[ 152.964024] [<ffffffff802a0b8b>] ? do_sync_read+0xc9/0x10c
[ 152.964024] [<ffffffff802417f8>] ? virtinfo_notifier_call+0x5b/0xa9
[ 152.964024] [<ffffffff802a3f1e>] ? vfs_getattr+0x35/0x74
[ 152.964024] [<ffffffffa0320c47>] ? :aufs:au_h_rdev+0x8b/0xec
[ 152.964024] [<ffffffff802b32f3>] ? inode_init_once+0x10/0xeb
[ 152.964024] [<ffffffffa031b418>] ? :aufs:au_new_inode+0x192/0x432
[ 152.964024] [<ffffffff802b1577>] ? d_instantiate+0x52/0x5d
[ 152.964024] [<ffffffffa031c6f3>] ? :aufs:epilog+0x5f/0x150
[ 152.964024] [<ffffffff802a886d>] ? vfs_mknod+0x11d/0x157
[ 152.964024] [<ffffffffa031cb35>] ? :aufs:add_simple+0x15e/0x2d8
[ 152.964024] [<ffffffffa031c457>] ? :aufs:aufs_permission+0x2b2/0x30e
[ 152.964024] [<ffffffff8031199f>] ? __up_read+0x13/0x8a
[ 152.964024] [<ffffffffa031cd41>] ? :aufs:aufs_mknod+0x2a/0x2f
[ 152.964024] [<ffffffff802a8838>] ? vfs_mknod+0xe8/0x157
[ 152.964024] [<ffffffff802ab06e>] ? sys_mknodat+0x190/0x1f4
[ 152.964024] [<ffffffff80311a37>] ? __up_write+0x21/0x10e
[ 152.964024] [<ffffffff8031199f>] ? __up_read+0x13/0x8a
[ 152.964024] [<ffffffff80423a39>] ? error_exit+0x0/0x60
[ 152.964024] [<ffffffff8020bffa>] ? system_call_after_swapgs+0x8a/0x8f
[ 152.964024]
[ 152.964024]
[ 152.964024] Code: ff c8 48 d3 e8 89 c0 48 0f af d0 48 89 55 60 48 8b 46 18 48 89 45 58 eb 12 48 89 ea 4c 89 ef ff d0 85 c0 89 c3 0f 85 b3 01 00 00 <49> 8b 45 28 31 db 48 81 78 38 20 8d 2f a0 0f 85 9f 01 00 00 8b
[ 152.964024] RIP [<ffffffffa02f8269>] :simfs:sim_systemcall+0x9b/0x272
[ 152.964024] RSP <ffff81001e937a28>
[ 152.964024] CR2: 0000000000000028
[ 153.342780] ---[ end trace d79ece63cdce3674 ]---
Message from syslogd@newpc at Dec 15 17:20:33 ...
kernel:[ 152.964024] Oops: 0000 [1] SMP
Message from syslogd@newpc at Dec 15 17:20:33 ...
kernel:[ 152.964024] Code: ff c8 48 d3 e8 89 c0 48 0f af d0 48 89 55 60 48 8b 46 18 48 89 45 58 eb 12 48 89 ea 4c 89 ef ff d0 85 c0 89 c3 0f 85 b3 01 00 00 <49> 8b 45 28 31 db 48 81 78 38 20 8d 2f a0 0f 85 9f 01 00 00 8b
Message from syslogd@newpc at Dec 15 17:20:33 ...
kernel:[ 152.964024] CR2: 0000000000000028
Killed
#

This is a blocker for me as I couldn't wrap chroot/debootstrap
environment with aufs to clone chroot tree quickly.

Regards,
Taisuke Yamada

-- Package-specific info:
** Version:
Linux version 2.6.26-1-openvz-amd64 (Debian 2.6.26-11) (waldi@debian.org) (gcc version 4.1.3 20080623 (prerelease) (Debian 4.1.2-23)) #1 SMP Wed Nov 26 19:23:13 UTC 2008

** Command line:
root=/dev/md1 ro console=tty0 console=ttyS0,115200

** Not tainted

** Kernel log:
[ 4.860104] scsi5 : ahci
[ 4.862839] ata1: SATA max UDMA/133 abar m2048@0xdc321000 port 0xdc321100 irq 1275
[ 4.869971] ata2: SATA max UDMA/133 abar m2048@0xdc321000 port 0xdc321180 irq 1275
[ 4.877765] ata3: SATA max UDMA/133 abar m2048@0xdc321000 port 0xdc321200 irq 1275
[ 4.885449] ata4: SATA max UDMA/133 abar m2048@0xdc321000 port 0xdc321280 irq 1275
[ 4.893130] ata5: SATA max UDMA/133 abar m2048@0xdc321000 port 0xdc321300 irq 1275
[ 4.900806] ata6: SATA max UDMA/133 abar m2048@0xdc321000 port 0xdc321380 irq 1275
[ 5.392036] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 5.418324] ata1.00: ATA-8: ST31000333AS, SD15, max UDMA/133
[ 5.432609] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 5.467482] ata1.00: configured for UDMA/133
[ 5.968036] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 6.004023] ata2.00: ATA-8: ST31000333AS, SD15, max UDMA/133
[ 6.009795] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 6.047421] ata2.00: configured for UDMA/133
[ 6.380036] ata3: SATA link down (SStatus 0 SControl 300)
[ 6.704036] ata4: SATA link down (SStatus 0 SControl 300)
[ 7.028035] ata5: SATA link down (SStatus 0 SControl 300)
[ 7.352036] ata6: SATA link down (SStatus 0 SControl 300)
[ 7.357653] scsi 0:0:0:0: Direct-Access ATA ST31000333AS SD15 PQ: 0 ANSI: 5
[ 7.367558] scsi 1:0:0:0: Direct-Access ATA ST31000333AS SD15 PQ: 0 ANSI: 5
[ 7.380006] JMB: IDE controller (0x197b:0x2368 rev 0x00) at PCI slot 0000:0d:00.0
[ 7.387727] ACPI: PCI Interrupt 0000:0d:00.0[A] -> GSI 16 (level, low) -> IRQ 16
[ 7.395307] JMB: 100% native mode on irq 16
[ 7.399575] ide0: BM-DMA at 0x2000-0x2007
[ 7.404009] ide1: BM-DMA at 0x2008-0x200f
[ 7.408448] Probing IDE interface ide0...
[ 7.972085] Probing IDE interface ide1...
[ 8.540091] ide0 at 0x2020-0x2027,0x2016 on irq 16
[ 8.545078] ide1 at 0x2018-0x201f,0x2012 on irq 16
[ 8.577547] Driver 'sd' needs updating - please use bus_type methods
[ 8.588005] sd 0:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB)
[ 8.600207] sd 0:0:0:0: [sda] Write Protect is off
[ 8.605090] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 8.605145] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 8.616096] sd 0:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB)
[ 8.624459] sd 0:0:0:0: [sda] Write Protect is off
[ 8.628747] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 8.628803] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 8.637986] sda: sda1 sda2
[ 8.646291] sd 0:0:0:0: [sda] Attached SCSI disk
[ 8.651082] sd 1:0:0:0: [sdb] 1953525168 512-byte hardware sectors (1000205 MB)
[ 8.658552] sd 1:0:0:0: [sdb] Write Protect is off
[ 8.663425] sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 8.663458] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 8.676005] sd 1:0:0:0: [sdb] 1953525168 512-byte hardware sectors (1000205 MB)
[ 8.684201] sd 1:0:0:0: [sdb] Write Protect is off
[ 8.688416] sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 8.688473] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 8.697649] sdb: sdb1 sdb2
[ 8.705472] sd 1:0:0:0: [sdb] Attached SCSI disk
[ 8.891070] md: raid1 personality registered for level 1
[ 8.907045] md: md0 stopped.
[ 8.940094] md: bind<sdb1>
[ 8.943181] md: bind<sda1>
[ 8.956006] raid1: raid set md0 active with 2 out of 3 mirrors
[ 8.967547] md: md1 stopped.
[ 9.014449] md: bind<sdb2>
[ 9.019027] md: bind<sda2>
[ 9.032006] raid1: raid set md1 active with 2 out of 3 mirrors
[ 9.126784] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
[ 9.137818] SGI XFS Quota Management subsystem
[ 9.143817] Filesystem "md1": Disabling barriers, not supported by the underlying device
[ 9.154691] XFS mounting filesystem md1
[ 9.320032] Ending clean XFS mount for filesystem: md1
[ 10.988271] udevd version 125 started
[ 11.931834] input: Power Button (FF) as /class/input/input2
[ 11.987643] ACPI: Power Button (FF) [PWRF]
[ 11.991918] input: Power Button (CM) as /class/input/input3
[ 12.082177] ACPI: Power Button (CM) [PWRB]
[ 12.650482] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.03 (30-Apr-2008)
[ 12.657453] iTCO_wdt: Found a ICH9R TCO device (Version=2, TCOBASE=0x1060)
[ 12.665408] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[ 12.757592] i801_smbus 0000:00:1f.3: enabling device (0141 -> 0143)
[ 12.763965] ACPI: PCI Interrupt 0000:00:1f.3[b] -> GSI 17 (level, low) -> IRQ 17
[ 12.897194] input: PC Speaker as /class/input/input4
[ 13.120694] Error: Driver 'pcspkr' is already registered, aborting...
[ 13.172129] pnp: the driver 'parport_pc' has been registered
[ 13.172149] parport_pc 00:0c: reported by Plug and Play ACPI
[ 13.177943] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
[ 13.276096] parport_pc 00:0c: driver attached
[ 15.131082] Filesystem "md1": Disabling barriers, not supported by the underlying device
[ 16.074725] loop: module loaded
[ 16.721691] Adding 1048568k swap on /var/swap/000.bin. Priority:-1 extents:1 across:1048568k
[ 17.713631] Bridge firewalling registered
[ 17.724008] br0: Dropping NETIF_F_UFO since no NETIF_F_HW_CSUM feature.
[ 17.741199] device eth0 entered promiscuous mode
[ 18.629133] NET: Registered protocol family 10
[ 18.634593] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 20.564952] eth0: Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[ 20.571915] br0: port 1(eth0) entering learning state
[ 20.579676] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 29.264034] br0: no IPv6 routers present
[ 31.208030] eth0: no IPv6 routers present
[ 35.576029] br0: topology change detected, propagating
[ 35.580025] br0: port 1(eth0) entering forwarding state
[ 36.238789] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 36.857596] tun: Universal TUN/TAP device driver, 1.6
[ 36.862734] tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
[ 63.288668] aufs 20080714

** Loaded modules:
Module Size Used by
aufs 139724 0
exportfs 8832 1 aufs
vzethdev 14592 0
vznetdev 24456 0
vzrst 122920 0
vzcpt 106424 0
tun 15492 2 vzrst,vzcpt
vzdquota 42868 0 [permanent]
vzmon 31248 4 vzethdev,vznetdev,vzrst,vzcpt
vzdev 7568 4 vzethdev,vznetdev,vzdquota,vzmon
xt_tcpudp 7680 0
xt_length 6400 0
ipt_ttl 6144 0
xt_tcpmss 6656 0
xt_TCPMSS 8576 0
iptable_mangle 8704 0
iptable_filter 8320 0
xt_multiport 7424 0
xt_limit 7172 0
xt_dscp 7168 0
ipt_REJECT 7552 0
ip_tables 21776 2 iptable_mangle,iptable_filter
x_tables 25736 10 xt_tcpudp,xt_length,ipt_ttl,xt_tcpmss,xt_TCPMSS,xt _multiport,xt_limit,xt_dscp,ipt_REJECT,ip_tables
ipv6 296256 13 vzrst,vzcpt,vzmon
bridge 54952 0
ext2 66448 1
mbcache 12804 1 ext2
loop 19340 0
parport_pc 31016 0
parport 41776 1 parport_pc
snd_pcm 81800 0
snd_timer 25744 1 snd_pcm
snd 63688 2 snd_pcm,snd_timer
soundcore 12064 1 snd
snd_page_alloc 13072 1 snd_pcm
psmouse 42268 0
pcspkr 7040 0
serio_raw 9988 0
i2c_i801 13596 0
i2c_core 27936 1 i2c_i801
iTCO_wdt 15696 0
container 8320 0
button 11680 0
evdev 14208 0
xfs 475304 1
raid1 24192 2
md_mod 79908 3 raid1
sd_mod 29376 6
ata_generic 10116 0
ide_pci_generic 9220 0 [permanent]
ahci 32520 4
libata 165472 2 ata_generic,ahci
scsi_mod 160888 2 sd_mod,libata
dock 14112 1 libata
jmicron 6912 0 [permanent]
ide_core 128156 2 ide_pci_generic,jmicron
ehci_hcd 36108 0
uhci_hcd 25760 0
e1000e 99620 0
thermal 22688 0
processor 42304 1 thermal
fan 9352 0
thermal_sys 17728 3 thermal,processor,fan

** PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation 3200/3210 Chipset DRAM Controller [8086:29f0] (rev 01)
Subsystem: Giga-byte Technology Device [1458:29f0]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
Latency: 0
Capabilities: <access denied>

00:01.0 PCI bridge [0604]: Intel Corporation 3200/3210 Chipset Host-Primary PCI Express Bridge [8086:29f1] (rev 01) (prog-if 00 [Normal decode])
Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity+ SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport-driver
Kernel modules: shpchp

00:19.0 Ethernet controller [0200]: Intel Corporation 82566DM-2 Gigabit Network Connection [8086:10bd] (rev 02)
Subsystem: Giga-byte Technology Device [1458:3000]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 1274
Region 0: Memory at dc100000 (32-bit, non-prefetchable) [size=128K]
Region 1: Memory at dc320000 (32-bit, non-prefetchable) [size=4K]
Region 2: I/O ports at 1820 [size=32]
Capabilities: <access denied>
Kernel driver in use: e1000e
Kernel modules: e1000e

00:1a.0 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology Device [1458:2937]
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 20
Region 4: I/O ports at 1840 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:1a.1 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology Device [1458:2938]
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin B routed to IRQ 21
Region 4: I/O ports at 1860 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:1a.2 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 [8086:2939] (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology Device [1458:2939]
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin C routed to IRQ 22
Region 4: I/O ports at 1880 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:1a.7 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 02) (prog-if 20 [EHCI])
Subsystem: Giga-byte Technology Device [1458:39f0]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin C routed to IRQ 22
Region 0: Memory at dc321800 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
Kernel modules: ehci-hcd

00:1c.0 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 02) (prog-if 00 [Normal decode])
Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=05, subordinate=05, sec-latency=0
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
BridgeCtl: Parity+ SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport-driver
Kernel modules: shpchp

00:1c.4 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 [8086:2948] (rev 02) (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=0d, subordinate=0d, sec-latency=0
I/O behind bridge: 00002000-00002fff
Prefetchable memory behind bridge: 0000000030000000-00000000300fffff
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport-driver
Kernel modules: shpchp

00:1c.5 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 [8086:294a] (rev 02) (prog-if 00 [Normal decode])
Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Bus: primary=00, secondary=0f, subordinate=0f, sec-latency=0
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
BridgeCtl: Parity+ SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport-driver
Kernel modules: shpchp

00:1d.0 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology Device [1458:2934]
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 19
Region 4: I/O ports at 18a0 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:1d.1 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology Device [1458:2935]
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin B routed to IRQ 20
Region 4: I/O ports at 18c0 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:1d.2 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology Device [1458:2936]
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin C routed to IRQ 21
Region 4: I/O ports at 18e0 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
Kernel modules: uhci-hcd

00:1d.7 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 02) (prog-if 20 [EHCI])
Subsystem: Giga-byte Technology Device [1458:39f0]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 19
Region 0: Memory at dc321c00 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
Kernel modules: ehci-hcd

00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev 92) (prog-if 01 [Subtractive decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Bus: primary=00, secondary=11, subordinate=11, sec-latency=32
I/O behind bridge: 00003000-00003fff
Memory behind bridge: dc000000-dc0fffff
Prefetchable memory behind bridge: 00000000d8000000-00000000dbffffff
Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
BridgeCtl: Parity+ SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>

00:1f.0 ISA bridge [0601]: Intel Corporation 82801IR (ICH9R) LPC Interface Controller [8086:2916] (rev 02)
Subsystem: Giga-byte Technology Device [1458:2910]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Capabilities: <access denied>
Kernel modules: iTCO_wdt

00:1f.2 SATA controller [0106]: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA AHCI Controller [8086:2922] (rev 02) (prog-if 01 [AHCI 1.0])
Subsystem: Giga-byte Technology Device [1458:2920]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin B routed to IRQ 1275
Region 0: I/O ports at 1c70 [size=8]
Region 1: I/O ports at 1c64 [size=4]
Region 2: I/O ports at 1c68 [size=8]
Region 3: I/O ports at 1c60 [size=4]
Region 4: I/O ports at 1c00 [size=32]
Region 5: Memory at dc321000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci

00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 02)
Subsystem: Giga-byte Technology Device [1458:2930]
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin B routed to IRQ 17
Region 0: Memory at dc322000 (64-bit, non-prefetchable) [size=256]
Region 4: I/O ports at 1c20 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c-i801

0d:00.0 IDE interface [0101]: JMicron Technologies, Inc. JMB368 IDE controller [197b:2368] (prog-if 85 [Master SecO PriO])
Subsystem: Giga-byte Technology Device [1458:b000]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: I/O ports at 2020 [size=8]
Region 1: I/O ports at 2014 [size=4]
Region 2: I/O ports at 2018 [size=8]
Region 3: I/O ports at 2010 [size=4]
Region 4: I/O ports at 2000 [size=16]
[virtual] Expansion ROM at 30000000 [disabled] [size=64K]
Capabilities: <access denied>
Kernel driver in use: JMicron IDE
Kernel modules: ata_generic, jmicron, ide-pci-generic

11:03.0 VGA compatible controller [0300]: XGI Technology Inc. (eXtreme Graphics Innovation) Volari Z7 [18ca:0020] (prog-if 00 [VGA controller])
Subsystem: Giga-byte Technology Device [1458:0020]
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
BIST result: 00
Region 0: Memory at d8000000 (32-bit, prefetchable) [size=64M]
Region 1: Memory at dc000000 (32-bit, non-prefetchable) [size=256K]
Region 2: I/O ports at 3000 [size=128]
Capabilities: <access denied>
Kernel modules: sisfb



-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-1-openvz-amd64 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash

Versions of packages linux-image-2.6.26-1-openvz-amd64 depends on:
ii debconf [debconf-2.0] 1.5.24 Debian configuration management sy
ii initramfs-tools [linux-initra 0.92j tools for generating an initramfs
ii module-init-tools 3.4-1 tools for managing Linux kernel mo
ii vzctl 3.0.22-14 server virtualization solution - c

linux-image-2.6.26-1-openvz-amd64 recommends no packages.

Versions of packages linux-image-2.6.26-1-openvz-amd64 suggests:
ii grub 0.97-47 GRand Unified Bootloader (Legacy v
pn linux-doc-2.6.26 <none> (no description available)

-- debconf information:
shared/kernel-image/really-run-bootloader: true
linux-image-2.6.26-1-openvz-amd64/preinst/overwriting-modules-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/postinst/old-system-map-link-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/postinst/bootloader-test-error-2.6.26-1-openvz-amd64:
linux-image-2.6.26-1-openvz-amd64/preinst/abort-install-2.6.26-1-openvz-amd64:
linux-image-2.6.26-1-openvz-amd64/prerm/removing-running-kernel-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/preinst/bootloader-initrd-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/postinst/bootloader-error-2.6.26-1-openvz-amd64:
linux-image-2.6.26-1-openvz-amd64/postinst/depmod-error-2.6.26-1-openvz-amd64: false
linux-image-2.6.26-1-openvz-amd64/postinst/depmod-error-initrd-2.6.26-1-openvz-amd64: false
linux-image-2.6.26-1-openvz-amd64/preinst/lilo-initrd-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/prerm/would-invalidate-boot-loader-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/preinst/failed-to-move-modules-2.6.26-1-openvz-amd64:
linux-image-2.6.26-1-openvz-amd64/postinst/kimage-is-a-directory:
linux-image-2.6.26-1-openvz-amd64/preinst/abort-overwrite-2.6.26-1-openvz-amd64:
linux-image-2.6.26-1-openvz-amd64/postinst/old-dir-initrd-link-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/postinst/old-initrd-link-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/preinst/initrd-2.6.26-1-openvz-amd64:
linux-image-2.6.26-1-openvz-amd64/preinst/elilo-initrd-2.6.26-1-openvz-amd64: true
linux-image-2.6.26-1-openvz-amd64/preinst/lilo-has-ramdisk:
linux-image-2.6.26-1-openvz-amd64/postinst/create-kimage-link-2.6.26-1-openvz-amd64: true



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Old 12-15-2008, 09:03 AM
Konstantin Khlebnikov
 
Default Bug#508773: linux-image-2.6.26-1-openvz-amd64: Oops in simfs module when accessing device over aufs

we have the same bug with aufs and simfs in our bugzilla:
http://bugzilla.openvz.org/show_bug.cgi?id=1054

can you try patch attached there?

Taisuke Yamada wrote:

Package: linux-image-2.6.26-1-openvz-amd64
Version: 2.6.26-11
Severity: normal

I found script below to always lock up my system with oops from
simfs module (OpenVZ).

#!/bin/sh
mkdir dir.ro dir.rw dir
mount -t aufs -o br:dir.rw:dir.ro=ro none dir
# removing simfs will prevent system from crashing
#modprobe -r simfs
mknod dir/anydev c 100 100

I'm reporting this for linux-image-2.6.26-1-openvz-amd64 package
because it is simfs module (OpenVZ component) that's oopsing, and
rmmod'ing simfs stops this from happening. However, this could be
related to aufs (aufs-modules-2.6.26-1-openvz-amd64 package).

Following is a session log took over serial console.

# mkdir dir.ro dir.rw dir
# mount -t aufs -o br:dir.rw:dir.ro=ro none dir
# mknod dir/anydev c 100 100
[ 152.961748] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[ 152.964024] IP: [<ffffffffa02f8269>] :simfs:sim_systemcall+0x9b/0x272
[ 152.964024] PGD 1e81d067 PUD 1d993067 PMD 0
[ 152.964024] Oops: 0000 [1] SMP
[ 152.964024] CPU: 0
[ 152.964024] Modules linked in: simfs aufs exportfs vzethdev vznetdev vzrst vzcpt tun vzdquota vzmon vzdev xt_tcpudp xt_length ipt_ttl xt_tcpmss xt_TCPMSS iptable_mangle iptable_filter xt_multiport xt_limit xt_dscp ipt_REJECT ip_tables x_tables ipv6 bridge ext2 mbcache loop parport_pc parport snd_pcm snd_timer snd soundcore snd_page_alloc pcspkr psmouse serio_raw i2c_i801 i2c_core iTCO_wdt container button evdev xfs raid1 md_mod sd_mod ata_generic ide_pci_generic ahci libata scsi_mod dock jmicron ide_core ehci_hcd uhci_hcd e1000e thermal processor fanthermal_sys [last unloaded: simfs]
[ 152.964024] Pid: 2581, comm: mknod Not tainted 2.6.26-1-openvz-amd64 #1 036test001
[ 152.964024] RIP: 0010:[<ffffffffa02f8269>] [<ffffffffa02f8269>] :simfs:sim_systemcall+0x9b/0x272
[ 152.964024] RSP: 0018:ffff81001e937a28 EFLAGS: 00010246
[ 152.964024] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
[ 152.964024] RDX: 0000000000000064 RSI: ffff81001f4ab800 RDI: ffff81001e937bb8
[ 152.964024] RBP: ffff81001e937bb8 R08: ffff81001cd8c340 R09: ffff81001cd7b5b8
[ 152.964024] R10: ffff81001f4ab908 R11: 0000000000000001 R12: ffff81001e937b58
[ 152.964024] R13: 0000000000000000 R14: ffff81001cd8a290 R15: ffff81001cd8c340
[ 152.964024] FS: 00007f4e96a45770(0000) GS:ffffffff80534000(0000) knlGS:0000000000000000
[ 152.964024] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 152.964024] CR2: 0000000000000028 CR3: 000000001e93a000 CR4: 00000000000006e0
[ 152.964024] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 152.964024] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 152.964024] Process mknod (pid: 2581, veid=0, threadinfo ffff81001e936000, task ffff81001f8cd7d0)
[ 152.964024] Stack: ffff81001cd7fd88 ffffffff8031199f 0000000000000002 ffff81001cd7fcc0
[ 152.964024] 0000000000000202 ffffffffa0135c5b ffff81001e937b48 0000000000000008
[ 152.964024] ffff81001dd681c0 ffffffffa01591cb 0000000100000000 ffff81001e937bb8
[ 152.964024] Call Trace:
[ 152.964024] [<ffffffff8031199f>] ? __up_read+0x13/0x8a
[ 152.964024] [<ffffffffa0135c5b>] ? :xfs:xfs_iunlock+0x31/0x7c
[ 152.964024] [<ffffffffa01591cb>] ? :xfs:xfs_read+0x1ec/0x21a
[ 152.964024] [<ffffffff802a0ac2>] ? do_sync_read+0x0/0x10c
[ 152.964024] [<ffffffff802a0b8b>] ? do_sync_read+0xc9/0x10c
[ 152.964024] [<ffffffff802417f8>] ? virtinfo_notifier_call+0x5b/0xa9
[ 152.964024] [<ffffffff802a3f1e>] ? vfs_getattr+0x35/0x74
[ 152.964024] [<ffffffffa0320c47>] ? :aufs:au_h_rdev+0x8b/0xec
[ 152.964024] [<ffffffff802b32f3>] ? inode_init_once+0x10/0xeb
[ 152.964024] [<ffffffffa031b418>] ? :aufs:au_new_inode+0x192/0x432
[ 152.964024] [<ffffffff802b1577>] ? d_instantiate+0x52/0x5d
[ 152.964024] [<ffffffffa031c6f3>] ? :aufs:epilog+0x5f/0x150
[ 152.964024] [<ffffffff802a886d>] ? vfs_mknod+0x11d/0x157
[ 152.964024] [<ffffffffa031cb35>] ? :aufs:add_simple+0x15e/0x2d8
[ 152.964024] [<ffffffffa031c457>] ? :aufs:aufs_permission+0x2b2/0x30e
[ 152.964024] [<ffffffff8031199f>] ? __up_read+0x13/0x8a
[ 152.964024] [<ffffffffa031cd41>] ? :aufs:aufs_mknod+0x2a/0x2f
[ 152.964024] [<ffffffff802a8838>] ? vfs_mknod+0xe8/0x157
[ 152.964024] [<ffffffff802ab06e>] ? sys_mknodat+0x190/0x1f4
[ 152.964024] [<ffffffff80311a37>] ? __up_write+0x21/0x10e
[ 152.964024] [<ffffffff8031199f>] ? __up_read+0x13/0x8a
[ 152.964024] [<ffffffff80423a39>] ? error_exit+0x0/0x60
[ 152.964024] [<ffffffff8020bffa>] ? system_call_after_swapgs+0x8a/0x8f
[ 152.964024]
[ 152.964024]
[ 152.964024] Code: ff c8 48 d3 e8 89 c0 48 0f af d0 48 89 55 60 48 8b 46 18 48 89 45 58 eb 12 48 89 ea 4c 89 ef ff d0 85 c0 89 c3 0f 85 b3 01 00 00 <49> 8b 45 28 31 db 48 81 78 38 20 8d 2f a0 0f 85 9f 01 00 00 8b
[ 152.964024] RIP [<ffffffffa02f8269>] :simfs:sim_systemcall+0x9b/0x272
[ 152.964024] RSP <ffff81001e937a28>
[ 152.964024] CR2: 0000000000000028
[ 153.342780] ---[ end trace d79ece63cdce3674 ]---
Message from syslogd@newpc at Dec 15 17:20:33 ...
kernel:[ 152.964024] Oops: 0000 [1] SMP
Message from syslogd@newpc at Dec 15 17:20:33 ...
kernel:[ 152.964024] Code: ff c8 48 d3 e8 89 c0 48 0f af d0 48 89 55 60 48 8b 46 18 48 89 45 58 eb 12 48 89 ea 4c 89 ef ff d0 85 c0 89 c3 0f 85 b3 01 00 00 <49> 8b 45 28 31 db 48 81 78 38 20 8d 2f a0 0f 85 9f 01 00 00 8b
Message from syslogd@newpc at Dec 15 17:20:33 ...
kernel:[ 152.964024] CR2: 0000000000000028
Killed
#

This is a blocker for me as I couldn't wrap chroot/debootstrap
environment with aufs to clone chroot tree quickly.

Regards,
Taisuke Yamada





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