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Old 07-06-2010, 02:43 PM
Kir Kolyshkin
 
Default Fwd: vzcpt kernel module crash while trying to dump with "vzctl chkpnt"

Hi debian-kernel,

An OpenVZ user Benjamin Henrion (cced) reported a bug (see below,
also [1], [2]) which is already fixed in our latest kernel 2.6.32-budarin.1
(by commit 7e99ed1bc34b60ed42eb2008edbb4f98684edb0a).

Can you please bring the Debian OpenVZ kernel up-to-date, which will fix
this bug as well as a few same-critical others?

Best regards,
Kir.

[1] http://bugzilla.openvz.org/1573
[2] http://bugzilla.openvz.org/1543


-------- Original Message --------
Subject: [Users] vzcpt kernel module crash while trying to dump with
"vzctl chkpnt"

Date: Mon, 5 Jul 2010 19:13:03 +0400
From: Benjamin Henrion <bh@udev.org>
Reply-To: users@openvz.org <users@openvz.org>
To: users@openvz.org <users@openvz.org>



Hi,

I am running a Debian Lenny kernel, and I am trying to simply dump a
container, and the kernel module named vzcpt crash:
# cat /proc/version
Linux version 2.6.32-5-openvz-686 (Debian 2.6.32-15)
(ben@decadent.org.uk) (gcc version 4.3.5 (Debian 4.3.5-1) ) #1 SMP Tue
Jun 1 06:52:26 UTC 2010

# vzctl chkpnt 103 --dump --dumpfile /var/lib/vz/dump/Dump.103
Setting up checkpoint...
join context..

(and then it hangs the shell)

I have submitted a bug here:

http://bugzilla.openvz.org/show_bug.cgi?id=1573

Does anybody has ever experienced this?

Best,

================================================== ========================
[25342.211353] BUG: unable to handle kernel paging request at 0a7e1000
[25342.211362] IP: [<f88031c7>] cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
[25342.211374] *pdpt = 00000000174f8001 *pde = 0000000000000000
[25342.211379] Oops: 0000 [#1] SMP
[25342.211384] last sysfs file:
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
[25342.211388] Modules linked in: binfmt_misc ppdev vzethdev vznetdev
simfs vzrst vzcpt vzdquota vzmon vzdev xt_tcpudp xt_length xt_hl
xt_tcpmss xt_TCPMSS iptable_mangle xt_multiport xt_limit xt_dscp
ipt_REJECT i8k acpi_cpufreq cpufreq_conservative cpufreq_userspace
cpufreq_powersave cpufreq_stats snd_hda_codec_intelhdmi
snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss
snd_mixer_oss snd_pcm arc4 snd_seq_midi ecb snd_rawmidi
snd_seq_midi_event snd_seq iptable_filter iwlagn zaurus sdhci_pci
iwlcore ip_tables sdhci cdc_ether snd_timer x_tables snd_seq_device
mmc_core mac80211 tpm_tis usbnet joydev tpm led_class ricoh_mmc mii
cdc_wdm cdc_acm snd tpm_bios battery cfg80211 wmi dell_laptop ac
psmouse soundcore dcdbas serio_raw evdev snd_page_alloc rfkill
processor lp parport ext4 mbcache jbd2 crc16 fan fuse dm_mirror
dm_region_hash dm_log dm_mod i915 sg drm_kms_helper sd_mod crc_t10dif
drm i2c_algo_bit i2c_core video button e1000e thermal ata_generic ahci
libata scsi_mod uhci_hcd ehci_hcd thermal_sys output usbcore nls_base
[25342.211505]
[25342.211510] Pid: 17647, comm: vzctl Not tainted
(2.6.32-5-openvz-686 #1) belyayev Latitude E4200 )
[25342.211516] EIP: 0060:[<f88031c7>] EFLAGS: 00010206 CPU: 0
[25342.211522] EIP is at cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
[25342.211526] EAX: 00000000 EBX: 00000000 ECX: 0a7e1000 EDX: 00000000
[25342.211530] ESI: 00000000 EDI: c1b57000 EBP: 00000000 ESP: d74ffdd4
[25342.211534] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[25342.211539] Process vzctl (pid: 17647, veid: 0, ti=d74fe000
task=f02b1810 task.ti=d74fe000)
[25342.211543] Stack:
[25342.211546] 0000001f f660da84 00000000 dcf97000 ffffffff ffffffff
00001007 00020010
[25342.211554]<0> ef298000 f660d800 00000000 c1b57000 f88044cf
00000000 0000fe38 00000000
[25342.211563]<0> 00000008 d7459000 c0000000 e0902180 e09021a4
00000000 00000000 08430000
[25342.211572] Call Trace:
[25342.211580] [<f88044cf>] ? cpt_dump_ifinfo+0xa92/0xb0b [vzcpt]
[25342.211588] [<f87f7453>] ? cpt_dump+0x297/0x578 [vzcpt]
[25342.211595] [<f87f4983>] ? cpt_ioctl+0x59f/0xc80 [vzcpt]
[25342.211603] [<c10f32ef>] ? proc_reg_unlocked_ioctl+0x8a/0xa3
[25342.211610] [<f87f43e4>] ? cpt_ioctl+0x0/0xc80 [vzcpt]
[25342.211615] [<c10f3265>] ? proc_reg_unlocked_ioctl+0x0/0xa3
[25342.211621] [<c10c97c4>] ? vfs_ioctl+0x1c/0x5f
[25342.211626] [<c10c9d47>] ? do_vfs_ioctl+0x499/0x4e5
[25342.211632] [<c10beb12>] ? fsnotify_modify+0x5a/0x61
[25342.211638] [<c10bed06>] ? do_sync_write+0x0/0x107
[25342.211643] [<c10bf787>] ? vfs_write+0x9e/0xd6
[25342.211648] [<c10c9dbf>] ? sys_ioctl+0x2c/0x42
[25342.211654] [<c1008120>] ? syscall_call+0x7/0xb
[25342.211657] Code: ab 89 fa e8 1b 50 ff ff c7 44 24 08 00 00 00 00
eb 49 83 cb ff 31 f6 eb 18 8b 4c 24 04 8b 01 8b 51 04 89 e9 03 0c 9d
38 59 3c c1<03> 34 08 03 34 0a a1 60 ab 27 c1 8d 4b 01 ba 20 00 00 00
e8 d5
[25342.211701] EIP: [<f88031c7>] cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
SS:ESP 0068:d74ffdd4
[25342.211710] CR2: 000000000a7e1000
[25342.211714] ---[ end trace 459d6cec44e9f66c ]---
[25345.975609] BUG: unable to handle kernel paging request at 0a7e1000
[25345.975616] IP: [<f88031c7>] cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
[25345.975627] *pdpt = 00000000174ae001 *pde = 0000000000000000
[25345.975633] Oops: 0000 [#2] SMP
[25345.975637] last sysfs file:
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
[25345.975641] Modules linked in: binfmt_misc ppdev vzethdev vznetdev
simfs vzrst vzcpt vzdquota vzmon vzdev xt_tcpudp xt_length xt_hl
xt_tcpmss xt_TCPMSS iptable_mangle xt_multiport xt_limit xt_dscp
ipt_REJECT i8k acpi_cpufreq cpufreq_conservative cpufreq_userspace
cpufreq_powersave cpufreq_stats snd_hda_codec_intelhdmi
snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss
snd_mixer_oss snd_pcm arc4 snd_seq_midi ecb snd_rawmidi
snd_seq_midi_event snd_seq iptable_filter iwlagn zaurus sdhci_pci
iwlcore ip_tables sdhci cdc_ether snd_timer x_tables snd_seq_device
mmc_core mac80211 tpm_tis usbnet joydev tpm led_class ricoh_mmc mii
cdc_wdm cdc_acm snd tpm_bios battery cfg80211 wmi dell_laptop ac
psmouse soundcore dcdbas serio_raw evdev snd_page_alloc rfkill
processor lp parport ext4 mbcache jbd2 crc16 fan fuse dm_mirror
dm_region_hash dm_log dm_mod i915 sg drm_kms_helper sd_mod crc_t10dif
drm i2c_algo_bit i2c_core video button e1000e thermal ata_generic ahci
libata scsi_mod uhci_hcd ehci_hcd thermal_sys output usbcore nls_base
[25345.975759]
[25345.975763] Pid: 17652, comm: vzctl Tainted: G D
(2.6.32-5-openvz-686 #1) belyayev Latitude E4200 )
[25345.975769] EIP: 0060:[<f88031c7>] EFLAGS: 00010206 CPU: 0
[25345.975776] EIP is at cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
[25345.975780] EAX: 00000000 EBX: 00000000 ECX: 0a7e1000 EDX: 00000000
[25345.975784] ESI: 00000000 EDI: c1b55000 EBP: 00000000 ESP: d74ffdd4
[25345.975788] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[25345.975793] Process vzctl (pid: 17652, veid: 0, ti=d74fe000
task=eee449a0 task.ti=d74fe000)
[25345.975797] Stack:
[25345.975799] 0000001f f6906a84 00000000 d7468000 ffffffff ffffffff
00001007 00020010
[25345.975807]<0> ef2984e0 f6906800 00000000 c1b55000 f88044cf
00000000 000130d8 00000000
[25345.975816]<0> 00000008 d74b9000 c0000000 c1ad0c00 c1ad0c24
00000000 00000000 08430000
[25345.975825] Call Trace:
[25345.975833] [<f88044cf>] ? cpt_dump_ifinfo+0xa92/0xb0b [vzcpt]
[25345.975842] [<f87f7453>] ? cpt_dump+0x297/0x578 [vzcpt]
[25345.975849] [<f87f4983>] ? cpt_ioctl+0x59f/0xc80 [vzcpt]
[25345.975857] [<c10f32ef>] ? proc_reg_unlocked_ioctl+0x8a/0xa3
[25345.975863] [<f87f43e4>] ? cpt_ioctl+0x0/0xc80 [vzcpt]
[25345.975868] [<c10f3265>] ? proc_reg_unlocked_ioctl+0x0/0xa3
[25345.975874] [<c10c97c4>] ? vfs_ioctl+0x1c/0x5f
[25345.975879] [<c10c9d47>] ? do_vfs_ioctl+0x499/0x4e5
[25345.975885] [<c10beb12>] ? fsnotify_modify+0x5a/0x61
[25345.975891] [<c10bed06>] ? do_sync_write+0x0/0x107
[25345.975896] [<c10bf787>] ? vfs_write+0x9e/0xd6
[25345.975901] [<c10c9dbf>] ? sys_ioctl+0x2c/0x42
[25345.975907] [<c1008120>] ? syscall_call+0x7/0xb
[25345.975910] Code: ab 89 fa e8 1b 50 ff ff c7 44 24 08 00 00 00 00
eb 49 83 cb ff 31 f6 eb 18 8b 4c 24 04 8b 01 8b 51 04 89 e9 03 0c 9d
38 59 3c c1<03> 34 08 03 34 0a a1 60 ab 27 c1 8d 4b 01 ba 20 00 00 00
e8 d5
[25345.975954] EIP: [<f88031c7>] cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
SS:ESP 0068:d74ffdd4
[25345.975963] CR2: 000000000a7e1000
[25345.975967] ---[ end trace 459d6cec44e9f66d ]---
[25454.087247] BUG: unable to handle kernel paging request at 0a7e1000
[25454.087255] IP: [<f88031c7>] cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
[25454.087268] *pdpt = 00000000175bf001 *pde = 0000000000000000
[25454.087273] Oops: 0000 [#3] SMP
[25454.087277] last sysfs file:
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
[25454.087282] Modules linked in: binfmt_misc ppdev vzethdev vznetdev
simfs vzrst vzcpt vzdquota vzmon vzdev xt_tcpudp xt_length xt_hl
xt_tcpmss xt_TCPMSS iptable_mangle xt_multiport xt_limit xt_dscp
ipt_REJECT i8k acpi_cpufreq cpufreq_conservative cpufreq_userspace
cpufreq_powersave cpufreq_stats snd_hda_codec_intelhdmi
snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss
snd_mixer_oss snd_pcm arc4 snd_seq_midi ecb snd_rawmidi
snd_seq_midi_event snd_seq iptable_filter iwlagn zaurus sdhci_pci
iwlcore ip_tables sdhci cdc_ether snd_timer x_tables snd_seq_device
mmc_core mac80211 tpm_tis usbnet joydev tpm led_class ricoh_mmc mii
cdc_wdm cdc_acm snd tpm_bios battery cfg80211 wmi dell_laptop ac
psmouse soundcore dcdbas serio_raw evdev snd_page_alloc rfkill
processor lp parport ext4 mbcache jbd2 crc16 fan fuse dm_mirror
dm_region_hash dm_log dm_mod i915 sg drm_kms_helper sd_mod crc_t10dif
drm i2c_algo_bit i2c_core video button e1000e thermal ata_generic ahci
libata scsi_mod uhci_hcd ehci_hcd thermal_sys output usbcore nls_base
[25454.087398]
[25454.087404] Pid: 17684, comm: vzctl Tainted: G D
(2.6.32-5-openvz-686 #1) belyayev Latitude E4200 )
[25454.087410] EIP: 0060:[<f88031c7>] EFLAGS: 00010206 CPU: 0
[25454.087416] EIP is at cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
[25454.087420] EAX: 00000000 EBX: 00000000 ECX: 0a7e1000 EDX: 00000000
[25454.087424] ESI: 00000000 EDI: e1941000 EBP: 00000000 ESP: d7479dd4
[25454.087428] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[25454.087433] Process vzctl (pid: 17684, veid: 0, ti=d7478000
task=eefdeb50 task.ti=d7478000)
[25454.087437] Stack:
[25454.087439] 0000001f f67c8e84 00000000 ef617000 ffffffff ffffffff
00001007 00020010
[25454.087448]<0> ef2989c0 f67c8c00 00000000 e1941000 f88044cf
00000000 00010df0 00000000
[25454.087456]<0> 00000008 dcf1d000 c0000000 e0902840 e0902864
00000000 00000000 08430000
[25454.087466] Call Trace:
[25454.087473] [<f88044cf>] ? cpt_dump_ifinfo+0xa92/0xb0b [vzcpt]
[25454.087482] [<f87f7453>] ? cpt_dump+0x297/0x578 [vzcpt]
[25454.087488] [<f87f4983>] ? cpt_ioctl+0x59f/0xc80 [vzcpt]
[25454.087496] [<c10f32ef>] ? proc_reg_unlocked_ioctl+0x8a/0xa3
[25454.087503] [<f87f43e4>] ? cpt_ioctl+0x0/0xc80 [vzcpt]
[25454.087508] [<c10f3265>] ? proc_reg_unlocked_ioctl+0x0/0xa3
[25454.087514] [<c10c97c4>] ? vfs_ioctl+0x1c/0x5f
[25454.087519] [<c10c9d47>] ? do_vfs_ioctl+0x499/0x4e5
[25454.087525] [<c10beb12>] ? fsnotify_modify+0x5a/0x61
[25454.087531] [<c10bed06>] ? do_sync_write+0x0/0x107
[25454.087536] [<c10bf787>] ? vfs_write+0x9e/0xd6
[25454.087542] [<c10c9dbf>] ? sys_ioctl+0x2c/0x42
[25454.087548] [<c1008120>] ? syscall_call+0x7/0xb
[25454.087551] Code: ab 89 fa e8 1b 50 ff ff c7 44 24 08 00 00 00 00
eb 49 83 cb ff 31 f6 eb 18 8b 4c 24 04 8b 01 8b 51 04 89 e9 03 0c 9d
38 59 3c c1<03> 34 08 03 34 0a a1 60 ab 27 c1 8d 4b 01 ba 20 00 00 00
e8 d5
[25454.087595] EIP: [<f88031c7>] cpt_dump_snmp_stat+0x63/0x119 [vzcpt]
SS:ESP 0068:d7479dd4
[25454.087604] CR2: 000000000a7e1000
[25454.087608] ---[ end trace 459d6cec44e9f66e ]---
================================================== ========================

--
Benjamin Henrion<bhenrion at ffii.org>
FFII Brussels - +32-484-566109 - +32-2-4148403
"In July 2005, after several failed attempts to legalise software
patents in Europe, the patent establishment changed its strategy.
Instead of explicitly seeking to sanction the patentability of
software, they are now seeking to create a central European patent
court, which would establish and enforce patentability rules in their
favor, without any possibility of correction by competing courts or
democratically elected legislators."
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