Kernel crash on running mercurial clone on a btrfs file system on a SSD Ubuntu 14.04

[Anshuman Aggarwal]

On running mercurial commands which add/remove lots of files from the disk (typically hard linked) the following error shows up. Since btrfs doesn't really have a fsck utility not sure what I should be running

Jun 18 12:57:27 one kernel: [151416.037158] CPU: 0 PID: 8362 Comm: hg Not tainted 3.13.0-55-generic #92-Ubuntu
Jun 18 12:57:27 one kernel: [151416.038376] Hardware name: /DH61WW, BIOS BEH6110H.86A.0035.2012.0112.2206 01/12/2012
Jun 18 12:57:27 one kernel: [151416.039594] task: ffff880082fd6000 ti: ffff8801023d2000 task.ti: ffff8801023d2000
Jun 18 12:57:27 one kernel: [151416.040812] RIP: 0010:[<ffffffff8137287d>] [<ffffffff8137287d>] memcpy+0xd/0x110
Jun 18 12:57:27 one kernel: [151416.042036] RSP: 0018:ffff8801023d3910 EFLAGS: 00010202
Jun 18 12:57:27 one kernel: [151416.043258] RAX: ffff880168d67dfe RBX: 000000000000009f RCX: 0000000000000013
Jun 18 12:57:27 one kernel: [151416.044491] RDX: 0000000000000007 RSI: 0005080000000000 RDI: ffff880168d67dfe
Jun 18 12:57:27 one kernel: [151416.045727] RBP: ffff8801023d3948 R08: 0000000000001000 R09: ffff8801023d3918
Jun 18 12:57:27 one kernel: [151416.046970] R10: 0000000000000000 R11: 0000000000000003 R12: ffff88008f53bb28
Jun 18 12:57:27 one kernel: [151416.048225] R13: 0000160000000000 R14: ffff880168d67e9d R15: 000000000000009f
Jun 18 12:57:27 one kernel: [151416.049482] FS: 00007fa796d7c740(0000) GS:ffff88021fa00000(0000) knlGS:0000000000000000
Jun 18 12:57:27 one kernel: [151416.050737] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 18 12:57:27 one kernel: [151416.051994] CR2: 00007fa796d9d000 CR3: 000000017f6dd000 CR4: 00000000000407f0
Jun 18 12:57:27 one kernel: [151416.053268] Stack:
Jun 18 12:57:27 one kernel: [151416.054536] ffffffffa028049c 0000000000001000 ffff88020ebcf800 ffff88020d8273f0
Jun 18 12:57:27 one kernel: [151416.055820] 0000000000000000 ffff88017125f640 ffff880193263720 ffff8801023d3a08
Jun 18 12:57:27 one kernel: [151416.057103] ffffffffa02653dc 0000000000003188 0000000000000000 0000000000001000
Jun 18 12:57:27 one kernel: [151416.058391] Call Trace:
Jun 18 12:57:27 one kernel: [151416.059686] [<ffffffffa028049c>] ? read_extent_buffer+0xbc/0x110 [btrfs]
Jun 18 12:57:27 one kernel: [151416.061114] [<ffffffffa02653dc>] btrfs_get_extent+0x91c/0x970 [btrfs]
Jun 18 12:57:27 one kernel: [151416.062471] [<ffffffffa027c697>] __do_readpage+0x357/0x730 [btrfs]
Jun 18 12:57:27 one kernel: [151416.063792] [<ffffffffa0264ac0>] ? btrfs_real_readdir+0x5b0/0x5b0 [btrfs]
Jun 18 12:57:27 one kernel: [151416.065110] [<ffffffffa027cdf2>] __extent_readpages.constprop.41+0x2a2/0x2c0 [btrfs]
Jun 18 12:57:27 one kernel: [151416.066441] [<ffffffffa0264ac0>] ? btrfs_real_readdir+0x5b0/0x5b0 [btrfs]
Jun 18 12:57:27 one kernel: [151416.067756] [<ffffffffa027ec76>] extent_readpages+0x1b6/0x1c0 [btrfs]
Jun 18 12:57:27 one kernel: [151416.069084] [<ffffffffa0264ac0>] ? btrfs_real_readdir+0x5b0/0x5b0 [btrfs]
Jun 18 12:57:27 one kernel: [151416.070385] [<ffffffff81197dc3>] ? alloc_pages_current+0xa3/0x160
Jun 18 12:57:27 one kernel: [151416.071699] [<ffffffffa0262c1f>] btrfs_readpages+0x1f/0x30 [btrfs]
Jun 18 12:57:27 one kernel: [151416.072969] [<ffffffff8115bb99>] __do_page_cache_readahead+0x1b9/0x260
Jun 18 12:57:27 one kernel: [151416.074213] [<ffffffff8115c072>] ondemand_readahead+0x152/0x2a0
Jun 18 12:57:27 one kernel: [151416.075455] [<ffffffff8117ecc8>] ? __vma_link_rb+0xb8/0xe0
Jun 18 12:57:27 one kernel: [151416.076694] [<ffffffff8115c1f1>] page_cache_sync_readahead+0x31/0x50
Jun 18 12:57:27 one kernel: [151416.077930] [<ffffffff81151cb5>] generic_file_aio_read+0x4c5/0x700
Jun 18 12:57:27 one kernel: [151416.079243] [<ffffffff81180f93>] ? mmap_region+0x163/0x600
Jun 18 12:57:27 one kernel: [151416.080603] [<ffffffff811bda1a>] do_sync_read+0x5a/0x90
Jun 18 12:57:27 one kernel: [151416.081825] [<ffffffff811be0b5>] vfs_read+0x95/0x160
Jun 18 12:57:27 one kernel: [151416.083037] [<ffffffff811bebc9>] SyS_read+0x49/0xa0
Jun 18 12:57:27 one kernel: [151416.084231] [<ffffffff81733d5d>] system_call_fastpath+0x1a/0x1f
Jun 18 12:57:27 one kernel: [151416.085408] Code: 43 4e 5b 5d c3 66 0f 1f 84 00 00 00 00 00 e8 fb fb ff ff eb e2 90 90 90 90 90 90 90 90 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 <f3> 48 a5 89 d1 f3 a4 c3 20 4c 8b 06 4c 8b 4e 08 4c 8b 56 10 4c
Jun 18 12:57:27 one kernel: [151416.088027] RIP [<ffffffff8137287d>] memcpy+0xd/0x110
Jun 18 12:57:27 one kernel: [151416.089294] RSP <ffff8801023d3910>
Jun 18 12:57:27 one kernel: [151416.263462] ---[ end trace 20764feb3a900ca9 ]---

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-55-generic 3.13.0-55.92
ProcVersionSignature: Ubuntu 3.13.0-55.92-generic 3.13.11-ckt20
Uname: Linux 3.13.0-55-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: bgadmin 25170 F.... pulseaudio
 /dev/snd/controlC1: bgadmin 25170 F.... pulseaudio
Date: Thu Jun 18 13:00:10 2015
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.13.0-55-generic root=UUID=736169b4-5ad3-482b-b86d-7c0c43a98fae ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-55-generic N/A
 linux-backports-modules-3.13.0-55-generic N/A
 linux-firmware 1.127.12
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/12/2012
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BEH6110H.86A.0035.2012.0112.2206
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DH61WW
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG23116-204
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrBEH6110H.86A.0035.2012.0112.2206:bd01/12/2012:svn:pn:pvr:rvnIntelCorporation:rnDH61WW:rvrAAG23116-204:cvn:ct3:cvr:

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

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 v4.1 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'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-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/v4.1-rc8-unstable/

[Anshuman Aggarwal (anshuman-aggarwal)]

This issue has occurred on a new installation of Ubuntu 14.04 on a SSD with btrfs filesystem on the full drive.

I will try booting with the mainline kernel and update the results here

[Anshuman Aggarwal (anshuman-aggarwal)]

kernel-fixed-upstream

[Anshuman Aggarwal (anshuman-aggarwal)]

Linux one 4.1.0-040100rc8-generic #201506150335 SMP Mon Jun 15 02:37:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

This is the version in which it is fixed for sure. Is the recommendation to stay on this kernel? I assume its unlikely to be back ported?