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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Summary changed:

- cp -r --reflink triggers kernel bug
+ [btrfs] cp -r --reflink triggers kernel bug

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https://bugs.launchpad.net/bugs/891158

Title:
  [btrfs] cp -r --reflink triggers kernel bug

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  I have btrs partition created with mkfs.btrfs v0.19.
  /dev/sdb2 on /media/stripe type btrfs (rw,relatime,compress=lzo)
  $ btrfs filesystem show
  Label: 'stripe'  uuid: 981757e7-85b8-40d5-8d19-558370339855
          Total devices 1 FS bytes used 62.84GB
          devid    1 size 196.00GB used 65.54GB path /dev/sdb2

  Btrfs Btrfs v0.19

  When I try to copy any non-empty directory with 'cp -a --reflink', cp crashes with segmentation fault, and I see following lines in the syslog:
  Nov 16 18:22:09 gurren kernel: [  189.233479] kernel BUG at /build/buildd/linux-3.0.0/fs/btrfs/delayed-inode.c:1693!
  Nov 16 18:22:09 gurren kernel: [  189.233482] invalid opcode: 0000 [#1] SMP 
  Nov 16 18:22:09 gurren kernel: [  189.233485] CPU 1 
  Nov 16 18:22:09 gurren kernel: [  189.233487] Modules linked in: isofs udf vmnet vsock vmci vmmon ah4 xfrm4_mode_transport deflate ctr twofish_generic twofish_x86_64 twofish_common camellia serpent blowfish cast5 des_generic xcbc rmd160 sha512_generic crypto_null af_key parport_pc ppdev binfmt_misc nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc dm_crypt snd_hda_codec_hdmi snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event nvidia(P) joydev snd_seq snd_timer snd_seq_device snd soundcore snd_page_alloc shpchp psmouse serio_raw w83627ehf hwmon_vid coretemp usbserial firewire_sbp2 lp parport btrfs zlib_deflate libcrc32c vesafb usbhid hid aacraid firewire_ohci pata_marvell ahci libahci firewire_core crc_itu_t sky2 skge
  Nov 16 18:22:09 gurren kernel: [  189.233540] 
  Nov 16 18:22:09 gurren kernel: [  189.233542] Pid: 3694, comm: cp Tainted: P            3.0.0-12-generic #20-Ubuntu System manufacturer P5Q-E/P5Q-E
  Nov 16 18:22:09 gurren kernel: [  189.233548] RIP: 0010:[<ffffffffa013df10>]  [<ffffffffa013df10>] btrfs_delayed_update_inode+0x120/0x130 [btrfs]
  Nov 16 18:22:09 gurren kernel: [  189.233568] RSP: 0018:ffff8801d008dc58  EFLAGS: 00010286
  Nov 16 18:22:09 gurren kernel: [  189.233570] RAX: 00000000ffffffe4 RBX: ffff8801c3650000 RCX: 0000000000018000
  Nov 16 18:22:09 gurren kernel: [  189.233573] RDX: 0000000000000033 RSI: 0000000000018000 RDI: ffff880201da41d0
  Nov 16 18:22:09 gurren kernel: [  189.233576] RBP: ffff8801d008dc98 R08: ffffe8ffffc84660 R09: ffff8801c34b42f8
  Nov 16 18:22:09 gurren kernel: [  189.233578] R10: 0000000000000000 R11: ffff8801c3609000 R12: ffff8801c3650048
  Nov 16 18:22:09 gurren kernel: [  189.233580] R13: ffff8801c3710588 R14: ffff8801c3609000 R15: ffff88021e13b800
  Nov 16 18:22:09 gurren kernel: [  189.233583] FS:  00007f5ec60147c0(0000) GS:ffff88022fc80000(0000) knlGS:0000000000000000
  Nov 16 18:22:09 gurren kernel: [  189.233586] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  Nov 16 18:22:09 gurren kernel: [  189.233588] CR2: 0000000000639078 CR3: 00000001cbe93000 CR4: 00000000000006e0
  Nov 16 18:22:09 gurren kernel: [  189.233591] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  Nov 16 18:22:09 gurren kernel: [  189.233593] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  Nov 16 18:22:09 gurren kernel: [  189.233596] Process cp (pid: 3694, threadinfo ffff8801d008c000, task ffff8801bce35c80)
  Nov 16 18:22:09 gurren kernel: [  189.233598] Stack:
  Nov 16 18:22:09 gurren kernel: [  189.233600]  0000000000000001 0000000000018000 000000000002ea95 ffff8801c36e8600
  Nov 16 18:22:09 gurren kernel: [  189.233604]  ffff8801c3710588 ffff8801c3609000 ffff8801ff49b1b0 0000000000000000
  Nov 16 18:22:09 gurren kernel: [  189.233608]  ffff8801d008dce8 ffffffffa00fa8a3 ffff8801ff44c198 0000000000000000
  Nov 16 18:22:09 gurren kernel: [  189.233613] Call Trace:
  Nov 16 18:22:09 gurren kernel: [  189.233629]  [<ffffffffa00fa8a3>] btrfs_update_inode+0x53/0x170 [btrfs]
  Nov 16 18:22:09 gurren kernel: [  189.233644]  [<ffffffffa01217d0>] btrfs_ioctl_clone+0x8b0/0xc00 [btrfs]
  Nov 16 18:22:09 gurren kernel: [  189.233659]  [<ffffffffa0125008>] btrfs_ioctl+0x218/0x660 [btrfs]
  Nov 16 18:22:09 gurren kernel: [  189.233664]  [<ffffffff8117923a>] file_ioctl+0x4a/0x120
  Nov 16 18:22:09 gurren kernel: [  189.233667]  [<ffffffff8117964b>] do_vfs_ioctl+0x33b/0x340
  Nov 16 18:22:09 gurren kernel: [  189.233671]  [<ffffffff8116c25a>] ? sys_newfstat+0x2a/0x40
  Nov 16 18:22:09 gurren kernel: [  189.233674]  [<ffffffff811796e1>] sys_ioctl+0x91/0xa0
  Nov 16 18:22:09 gurren kernel: [  189.233679]  [<ffffffff815f22c2>] system_call_fastpath+0x16/0x1b
  Nov 16 18:22:09 gurren kernel: [  189.233681] Code: 00 03 00 00 8d 0c 49 48 89 ca 48 89 4d c8 e8 e8 3a fa ff 85 c0 48 8b 4d c8 75 10 48 89 4b 08 e9 40 ff ff ff 0f 1f 80 00 00 00 00 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 
  Nov 16 18:22:09 gurren kernel: [  189.233715] RIP  [<ffffffffa013df10>] btrfs_delayed_update_inode+0x120/0x130 [btrfs]
  Nov 16 18:22:09 gurren kernel: [  189.233729]  RSP <ffff8801d008dc58>
  Nov 16 18:22:09 gurren kernel: [  189.233732] ---[ end trace 03e4441b5f32b830 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ranma      2992 F.... pulseaudio
  CRDA: Error: [Errno 2] Нет такого файла или каталога
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfbff8000 irq 45'
     Mixer name	: 'Analog Devices AD1989B'
     Components	: 'HDA:11d4989b,10438311,00100300'
     Controls      : 47
     Simple ctrls  : 26
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xfe5fc000 irq 17'
     Mixer name	: 'Nvidia GPU 12 HDMI/DP'
     Components	: 'HDA:10de0012,10de0101,00100100'
     Controls      : 18
     Simple ctrls  : 6
  Date: Wed Nov 16 18:25:21 2011
  HibernationDevice: RESUME=UUID=869540bb-d1e1-4202-9bce-58fc6cac40b7
  MachineType: System manufacturer P5Q-E
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=ru_RU.utf8
   LANGUAGE=ru_RU:ru:en_GB:en
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic root=UUID=39f97f1d-566c-45a4-a45a-41d6964e7de2 ro acpi_enforce_resources=lax quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-12-generic N/A
   linux-backports-modules-3.0.0-12-generic  N/A
   linux-firmware                            1.60
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2011-10-15 (31 days ago)
  WpaSupplicantLog:
   
  dmi.bios.date: 04/06/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2101
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5Q-E
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2101:bd04/06/2009:svnSystemmanufacturer:pnP5Q-E:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5Q-E:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: P5Q-E
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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