[Kernel-packages] [Bug 1586838] Re: bcache causes a kernel bug when adding a new cache device

2016-06-09 Thread Jacky Wang
v4.7-rc2 kernel (http://kernel.ubuntu.com/~kernel-
ppa/mainline/v4.7-rc2-yakkety/) sees the same issue:

[   70.064983] kernel BUG at 
/home/kernel/COD/linux/drivers/md/bcache/super.c:1822!
[   70.065214] invalid opcode:  [#1] SMP
[   70.065355] Modules linked in: fuse ppdev input_leds lpc_ich 
intel_powerclamp led_class joydev serio_raw parport_pc sg i2c_piix4 ac battery 
parport mac_hid acpi_cpufreq ib_iser rdma_cm iw_cm ib_cm ib_core configfs 
iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 
raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq 
libcrc32c raid1 multipath linear bcache raid0 md_mod sr_mod cdrom sd_mod 
ata_generic pata_acpi hid_generic usbhid hid ohci_pci crct10dif_pclmul 
virtio_net crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel ahci 
aes_x86_64 lrw gf128mul libahci glue_helper ablk_helper cryptd ohci_hcd 
ehci_pci ata_piix ehci_hcd libata usbcore scsi_mod psmouse usb_common fjes 
virtio_pci virtio_ring virtio video button jitterentropy_rng drbg ansi_cprng

[   70.071156] CPU: 3 PID: 1557 Comm: bcache-register Not tainted 
4.7.0-040700rc2-generic #201606051831
[   70.071417] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS 
VirtualBox 12/01/2006
[   70.071655] task: 8800775f ti: 88007bf84000 task.ti: 
88007bf84000
[   70.072051] RIP: 0010:[]  [] 
cache_alloc.isra.21+0x646/0x670 [bcache]
[   70.072757] RSP: 0018:88007bf87d18  EFLAGS: 00010246
[   70.073129] RAX: 88007757b070 RBX: 88007c228000 RCX: 07f8
[   70.073516] RDX: 07f7 RSI:  RDI: 88007d003b80
[   70.073902] RBP: 88007bf87d30 R08: 88007fd99f40 R09: 88007d003b80
[   70.074288] R10: 88007757b070 R11: 0040 R12: 
[   70.074674] R13: 0010 R14: 88007b2308f0 R15: 880078479000
[   70.075061] FS:  7f2bd2778700() GS:88007fd8() 
knlGS:
[   70.075708] CS:  0010 DS:  ES:  CR0: 80050033
[   70.076064] CR2: 7f2bd21e1130 CR3: 79a4b000 CR4: 000406e0
[   70.076452] DR0:  DR1:  DR2: 
[   70.076854] DR3:  DR6: fffe0ff0 DR7: 0400
[   70.077267] Stack:
[   70.077565]  880035568340 ea0001efbcc0 88007c228000 
88007bf87dd0
[   70.078547]  c02e83f9 88007952b500 880035648f00 
005b
[   70.079455]  0080 88007c228008 88007757b080 
0009
[   70.081160] Call Trace:
[   70.081755]  [] register_bcache+0x2d9/0x1190 [bcache]
[   70.082165]  [] kobj_attr_store+0xf/0x20
[   70.082530]  [] ? kobj_attr_store+0xf/0x20
[   70.082902]  [] sysfs_kf_write+0x37/0x40
[   70.083278]  [] kernfs_fop_write+0x118/0x1a0
[   70.083635]  [] __vfs_write+0x37/0x160
[   70.083977]  [] ? apparmor_file_permission+0x18/0x20
[   70.084349]  [] ? security_file_permission+0x3d/0xc0
[   70.084721]  [] ? percpu_down_read+0x12/0x50
[   70.085075]  [] vfs_write+0xb8/0x1b0
[   70.085412]  [] SyS_write+0x55/0xc0
[   70.086226]  [] entry_SYSCALL_64_fastpath+0x1e/0xa8
[   70.086631] Code: 6a fd ff ff e9 4d fd ff ff be c0 00 40 02 4c 89 e7 e8 bf 
aa f1 c0 48 85 c0 48 89 83 f0 0a 00 00 0f 85 96 fd ff ff e9 79 fd ff ff <0f> 0b 
0f 0b 0f 0b bf 40 00 00 00 e8 2a a2 ef c0 48 85 c0 48 89
[   70.090234] RIP  [] cache_alloc.isra.21+0x646/0x670 
[bcache]
[   70.090848]  RSP 
[   70.091365] ---[ end trace 241fa6e06ca0e7af ]---

** Tags added: kernel-bug-exists-upstream

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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Title:
  bcache causes a kernel bug when adding a new cache device

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 16.04 on virtualbox 5.0.20. VirtualBoxAddition is installed.

  The issue happens on both out-of-box 4.4.0 kernel and the later-
  installed 4.4.11 kernel. 100% re-producible. The same issue applies to
  both virtual hard drive (/dev/sdb) and file-base block device
  (/dev/loop2) I created within Ubuntu.

  $ sudo make-bcache -C /dev/sdb

  The error shows (through dmesg):
  [   47.616016] [ cut here ]
  [   47.616035] kernel BUG at 
/home/kernel/COD/linux/drivers/md/bcache/super.c:1822!
  [   47.616051] invalid opcode:  [#1] SMP
  [   47.616063] Modules linked in: vboxsf(OE) ppdev vboxvideo(OE) ttm 
drm_kms_helper input_leds joydev drm serio_raw lpc_ich fb_sys_fops syscopyarea 
i2c_piix4 sysfillrect sysimgblt 8250_fintek parport_pc vboxguest(OE) parport 
mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp 
libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq 
libcrc32c raid1 multipath linear bcache 

[Kernel-packages] [Bug 1586838] Re: bcache causes a kernel bug when adding a new cache device

2016-06-08 Thread Jacky Wang
I tried to install the latest kernel as following:

$ sudo dpkg -i *.deb
(Reading database ... 130671 files and directories currently installed.)
Preparing to unpack 
linux-headers-4.7.0-040700rc1_4.7.0-040700rc1.201605291331_all.deb ...
Unpacking linux-headers-4.7.0-040700rc1 (4.7.0-040700rc1.201605291331) over 
(4.7.0-040700rc1.201605291331) ...
Preparing to unpack 
linux-headers-4.7.0-040700rc1-generic_4.7.0-040700rc1.201605291331_amd64.deb ...
Unpacking linux-headers-4.7.0-040700rc1-generic (4.7.0-040700rc1.201605291331) 
over (4.7.0-040700rc1.201605291331) ...
Preparing to unpack 
linux-image-4.7.0-040700rc1-generic_4.7.0-040700rc1.201605291331_amd64.deb ...
Done.
Unpacking linux-image-4.7.0-040700rc1-generic (4.7.0-040700rc1.201605291331) 
over (4.7.0-040700rc1.201605291331) ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
Setting up linux-headers-4.7.0-040700rc1 (4.7.0-040700rc1.201605291331) ...
Setting up linux-headers-4.7.0-040700rc1-generic (4.7.0-040700rc1.201605291331) 
...
Setting up linux-image-4.7.0-040700rc1-generic (4.7.0-040700rc1.201605291331) 
...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Not updating initrd symbolic links since we are being updated/reinstalled
(4.7.0-040700rc1.201605291331 was configured last, according to dpkg)
Not updating image symbolic links since we are being updated/reinstalled
(4.7.0-040700rc1.201605291331 was configured last, according to dpkg)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
update-initramfs: Generating /boot/initrd.img-4.7.0-040700rc1-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 
4.7.0-040700rc1-generic /boot/vmlinuz-4.7.0-040700rc1-generic
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.7.0-040700rc1-generic
Found initrd image: /boot/initrd.img-4.7.0-040700rc1-generic
Found linux image: /boot/vmlinuz-4.4.11-040411-generic
Found initrd image: /boot/initrd.img-4.4.11-040411-generic
Found linux image: /boot/vmlinuz-4.4.0-21-generic
Found initrd image: /boot/initrd.img-4.4.0-21-generic
done

But my server couldn't boot up and it shows:

BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs)

I have to roll back to the 4.4.11 kernel. Please advice the next step.

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https://bugs.launchpad.net/bugs/1586838

Title:
  bcache causes a kernel bug when adding a new cache device

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 16.04 on virtualbox 5.0.20. VirtualBoxAddition is installed.

  The issue happens on both out-of-box 4.4.0 kernel and the later-
  installed 4.4.11 kernel. 100% re-producible. The same issue applies to
  both virtual hard drive (/dev/sdb) and file-base block device
  (/dev/loop2) I created within Ubuntu.

  $ sudo make-bcache -C /dev/sdb

  The error shows (through dmesg):
  [   47.616016] [ cut here ]
  [   47.616035] kernel BUG at 
/home/kernel/COD/linux/drivers/md/bcache/super.c:1822!
  [   47.616051] invalid opcode:  [#1] SMP
  [   47.616063] Modules linked in: vboxsf(OE) ppdev vboxvideo(OE) ttm 
drm_kms_helper input_leds joydev drm serio_raw lpc_ich fb_sys_fops syscopyarea 
i2c_piix4 sysfillrect sysimgblt 8250_fintek parport_pc vboxguest(OE) parport 
mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp 
libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq 
libcrc32c raid1 multipath linear bcache raid0 hid_generic usbhid hid 
crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper 
ablk_helper cryptd psmouse fjes ahci libahci pata_acpi video
  [   47.616255] CPU: 2 PID: 1247 Comm: bcache-register Tainted: G   OE 
  4.4.11-040411-generic #201605182255
  [   47.616277] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS 
VirtualBox 12/01/2006
  [   47.616295] task: 88003514 ti: 88007684 task.ti: 
88007684
  [   47.616311] RIP: 0010:[]  [] 
cache_alloc.isra.20+0x646/0x670 [bcache]
  [   47.616340] RSP: 0018:880076843d10  EFLAGS: 

[Kernel-packages] [Bug 1586838] Re: bcache causes a kernel bug when adding a new cache device

2016-06-07 Thread Joseph Salisbury
Did this issue start happening after an update/upgrade?  Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.7-rc1 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc1-yakkety/

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1586838

Title:
  bcache causes a kernel bug when adding a new cache device

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 16.04 on virtualbox 5.0.20. VirtualBoxAddition is installed.

  The issue happens on both out-of-box 4.4.0 kernel and the later-
  installed 4.4.11 kernel. 100% re-producible. The same issue applies to
  both virtual hard drive (/dev/sdb) and file-base block device
  (/dev/loop2) I created within Ubuntu.

  $ sudo make-bcache -C /dev/sdb

  The error shows (through dmesg):
  [   47.616016] [ cut here ]
  [   47.616035] kernel BUG at 
/home/kernel/COD/linux/drivers/md/bcache/super.c:1822!
  [   47.616051] invalid opcode:  [#1] SMP
  [   47.616063] Modules linked in: vboxsf(OE) ppdev vboxvideo(OE) ttm 
drm_kms_helper input_leds joydev drm serio_raw lpc_ich fb_sys_fops syscopyarea 
i2c_piix4 sysfillrect sysimgblt 8250_fintek parport_pc vboxguest(OE) parport 
mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp 
libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq 
libcrc32c raid1 multipath linear bcache raid0 hid_generic usbhid hid 
crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper 
ablk_helper cryptd psmouse fjes ahci libahci pata_acpi video
  [   47.616255] CPU: 2 PID: 1247 Comm: bcache-register Tainted: G   OE 
  4.4.11-040411-generic #201605182255
  [   47.616277] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS 
VirtualBox 12/01/2006
  [   47.616295] task: 88003514 ti: 88007684 task.ti: 
88007684
  [   47.616311] RIP: 0010:[]  [] 
cache_alloc.isra.20+0x646/0x670 [bcache]
  [   47.616340] RSP: 0018:880076843d10  EFLAGS: 00010246
  [   47.616352] RAX: 880079528c60 RBX: 8800796a RCX: 
05d2
  [   47.616367] RDX: 05d1 RSI:  RDI: 
00019d40
  [   47.616382] RBP: 880076843d28 R08: 88007fd19d40 R09: 
88007d001d00
  [   47.616398] R10: 880079528c60 R11: 88007b590958 R12: 

  [   47.616413] R13: 0010 R14: 88007c3c4000 R15: 
8800796a
  [   47.616428] FS:  7ff8ffa10700() GS:88007fd0() 
knlGS:
  [   47.616445] CS:  0010 DS:  ES:  CR0: 80050033
  [   47.616458] CR2: 7ff8ff4c1d30 CR3: 77f7 CR4: 
000406e0
  [   47.616476] DR0:  DR1:  DR2: 

  [   47.616491] DR3:  DR6: fffe0ff0 DR7: 
0400
  [   47.616506] Stack:
  [   47.616511]  ea0001e880c0 88007cc28680  
880076843dd0
  [   47.616531]  c01373e3 880076843d58 811c8de5 
7fd61025
  [   47.616551]  7ff8ff4cf000 88007b590958 8800796a0008 
0009
  [   47.616570] Call Trace:
  [   47.616585]  [] register_bcache+0x2b3/0x1140 [bcache]
  [   47.616626]  [] ? page_add_file_rmap+0x25/0x60
  [   47.617074]  [] ? unlock_page+0x69/0x70
  [   47.617516]  [] kobj_attr_store+0xf/0x20
  [   47.617946]  [] sysfs_kf_write+0x37/0x40
  [   47.618353]  [] kernfs_fop_write+0x11d/0x170
  [   47.618755]  [] __vfs_write+0x37/0x110
  [   47.619149]  [] ? apparmor_file_permission+0x18/0x20
  [   47.619543]  [] ? security_file_permission+0x3d/0xc0
  [   47.619922]  [] ? percpu_down_read+0x12/0x50
  [   47.620290]  [] vfs_write+0xa9/0x1a0
  [   47.620648]  [] SyS_write+0x55/0xc0
  [   47.621021]  [] entry_SYSCALL_64_fastpath+0x16/0x71
  [   47.621362] Code: 6a fd ff ff e9 4d fd ff ff be c0 00 40 02 4c 89 e7 e8 cf 
61 0b c1 48 85 c0 48 89 83 f0 0a 00 00 0f 85 96 fd ff ff e9 79 fd ff ff <0f> 0b 
0f 0b 0f 0b bf 40 00 00 00 e8 9a 90 09 c1 48 85 c0 48 89
  [   47.622456] RIP  [] cache_alloc.isra.20+0x646/0x670 
[bcache]
  [   47.622812]  RSP 
  [   47.623177] ---[ end trace 19bcd02731ac9be1 ]---
  --- 
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  DistroRelease: Ubuntu 16.04
  InstallationDate: 

[Kernel-packages] [Bug 1586838] Re: bcache causes a kernel bug when adding a new cache device

2016-05-29 Thread Jacky Wang
apport information

** Tags added: apport-collected xenial

** Description changed:

  Ubuntu 16.04 on virtualbox 5.0.20. VirtualBoxAddition is installed.
  
  The issue happens on both out-of-box 4.4.0 kernel and the later-
  installed 4.4.11 kernel. 100% re-producible. The same issue applies to
  both virtual hard drive (/dev/sdb) and file-base block device
  (/dev/loop2) I created within Ubuntu.
  
  $ sudo make-bcache -C /dev/sdb
  
  The error shows (through dmesg):
  [   47.616016] [ cut here ]
  [   47.616035] kernel BUG at 
/home/kernel/COD/linux/drivers/md/bcache/super.c:1822!
  [   47.616051] invalid opcode:  [#1] SMP
  [   47.616063] Modules linked in: vboxsf(OE) ppdev vboxvideo(OE) ttm 
drm_kms_helper input_leds joydev drm serio_raw lpc_ich fb_sys_fops syscopyarea 
i2c_piix4 sysfillrect sysimgblt 8250_fintek parport_pc vboxguest(OE) parport 
mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp 
libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq 
libcrc32c raid1 multipath linear bcache raid0 hid_generic usbhid hid 
crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper 
ablk_helper cryptd psmouse fjes ahci libahci pata_acpi video
  [   47.616255] CPU: 2 PID: 1247 Comm: bcache-register Tainted: G   OE 
  4.4.11-040411-generic #201605182255
  [   47.616277] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS 
VirtualBox 12/01/2006
  [   47.616295] task: 88003514 ti: 88007684 task.ti: 
88007684
  [   47.616311] RIP: 0010:[]  [] 
cache_alloc.isra.20+0x646/0x670 [bcache]
  [   47.616340] RSP: 0018:880076843d10  EFLAGS: 00010246
  [   47.616352] RAX: 880079528c60 RBX: 8800796a RCX: 
05d2
  [   47.616367] RDX: 05d1 RSI:  RDI: 
00019d40
  [   47.616382] RBP: 880076843d28 R08: 88007fd19d40 R09: 
88007d001d00
  [   47.616398] R10: 880079528c60 R11: 88007b590958 R12: 

  [   47.616413] R13: 0010 R14: 88007c3c4000 R15: 
8800796a
  [   47.616428] FS:  7ff8ffa10700() GS:88007fd0() 
knlGS:
  [   47.616445] CS:  0010 DS:  ES:  CR0: 80050033
  [   47.616458] CR2: 7ff8ff4c1d30 CR3: 77f7 CR4: 
000406e0
  [   47.616476] DR0:  DR1:  DR2: 

  [   47.616491] DR3:  DR6: fffe0ff0 DR7: 
0400
  [   47.616506] Stack:
  [   47.616511]  ea0001e880c0 88007cc28680  
880076843dd0
  [   47.616531]  c01373e3 880076843d58 811c8de5 
7fd61025
  [   47.616551]  7ff8ff4cf000 88007b590958 8800796a0008 
0009
  [   47.616570] Call Trace:
  [   47.616585]  [] register_bcache+0x2b3/0x1140 [bcache]
  [   47.616626]  [] ? page_add_file_rmap+0x25/0x60
  [   47.617074]  [] ? unlock_page+0x69/0x70
  [   47.617516]  [] kobj_attr_store+0xf/0x20
  [   47.617946]  [] sysfs_kf_write+0x37/0x40
  [   47.618353]  [] kernfs_fop_write+0x11d/0x170
  [   47.618755]  [] __vfs_write+0x37/0x110
  [   47.619149]  [] ? apparmor_file_permission+0x18/0x20
  [   47.619543]  [] ? security_file_permission+0x3d/0xc0
  [   47.619922]  [] ? percpu_down_read+0x12/0x50
  [   47.620290]  [] vfs_write+0xa9/0x1a0
  [   47.620648]  [] SyS_write+0x55/0xc0
  [   47.621021]  [] entry_SYSCALL_64_fastpath+0x16/0x71
  [   47.621362] Code: 6a fd ff ff e9 4d fd ff ff be c0 00 40 02 4c 89 e7 e8 cf 
61 0b c1 48 85 c0 48 89 83 f0 0a 00 00 0f 85 96 fd ff ff e9 79 fd ff ff <0f> 0b 
0f 0b 0f 0b bf 40 00 00 00 e8 9a 90 09 c1 48 85 c0 48 89
  [   47.622456] RIP  [] cache_alloc.isra.20+0x646/0x670 
[bcache]
  [   47.622812]  RSP 
  [   47.623177] ---[ end trace 19bcd02731ac9be1 ]---
+ --- 
+ ApportVersion: 2.20.1-0ubuntu2.1
+ Architecture: amd64
+ DistroRelease: Ubuntu 16.04
+ InstallationDate: Installed on 2016-05-29 (0 days ago)
+ InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 
(20160420.3)
+ Package: linux (not installed)
+ ProcEnviron:
+  TERM=xterm
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
+ Tags:  xenial
+ Uname: Linux 4.4.11-040411-generic x86_64
+ UnreportableReason: The running kernel is not an Ubuntu kernel
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
+ _MarkForUpload: True

** Attachment added: "JournalErrors.txt"
   
https://bugs.launchpad.net/bugs/1586838/+attachment/4672629/+files/JournalErrors.txt

** Description changed:

  Ubuntu 16.04 on virtualbox 5.0.20. VirtualBoxAddition is installed.
  
  The issue happens on both out-of-box 4.4.0 kernel and the later-
  installed 4.4.11 kernel. 100% re-producible. The same issue applies to
  both virtual hard drive (/dev/sdb)