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[Jürg Häfliger <1821317@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1812845 ***
    https://bugs.launchpad.net/bugs/1812845

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1821317

Title:
  5fbc7c59fd22c5a6531b40b0759624b680a95e52 in ubuntu_btrfs_kernel_fixes
  triggers system hang on X/B i386

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I think this is identical to bug 1812845

  Run 5fbc7c59fd22c5a6531b40b0759624b680a95e52 test in
  ubuntu_btrfs_kernel_fixes on an i386 system will make the SUT hang.

  This test will:
  1. Create a 5-disk RAID5
  2. Corrupt one of the device
  3. Mount the FS as degraded
  4. run btrfs scrub

  In bug 1812845 it just skipped step 2 and 3, and Andrea's patch states
  that this is caused by finish_parity_scrub(), so I think they're the
  same. If that's the case we should disable this test for now.

  This is the last thing we can see from the syslog:

  Mar 22 10:45:14 onza kernel: [12628.790147] Invoking test 5fbc7c59fd22c5a6531b40b0759624b680a95e52
  Mar 22 10:45:15 onza kernel: [12629.635268] BTRFS: device fsid 7031ed1d-0a3e-41dd-8cca-348d4e8ab82a devid 1 transid 5 /dev/loop0
  Mar 22 10:45:15 onza kernel: [12629.759316] BTRFS: device fsid 7031ed1d-0a3e-41dd-8cca-348d4e8ab82a devid 2 transid 5 /dev/loop1
  Mar 22 10:45:15 onza kernel: [12629.902400] BTRFS: device fsid 7031ed1d-0a3e-41dd-8cca-348d4e8ab82a devid 3 transid 5 /dev/loop2
  Mar 22 10:45:15 onza kernel: [12630.031103] BTRFS: device fsid 7031ed1d-0a3e-41dd-8cca-348d4e8ab82a devid 4 transid 5 /dev/loop3
  Mar 22 10:45:15 onza kernel: [12630.202480] BTRFS: device fsid 7031ed1d-0a3e-41dd-8cca-348d4e8ab82a devid 5 transid 5 /dev/loop4
  Mar 22 10:45:16 onza kernel: [12631.419614] BTRFS info (device loop4): allowing degraded mounts
  Mar 22 10:45:16 onza kernel: [12631.419619] BTRFS info (device loop4): disk space caching is enabled
  Mar 22 10:45:16 onza kernel: [12631.419622] BTRFS info (device loop4): has skinny extents
  Mar 22 10:45:16 onza kernel: [12631.419624] BTRFS info (device loop4): flagging fs with big metadata feature
  Mar 22 10:45:16 onza kernel: [12631.420993] BTRFS warning (device loop4): devid 2 uuid f81e256a-ab46-4948-aa3d-3e8d0234fa9b is missing
  Mar 22 10:45:16 onza kernel: [12631.421888] BTRFS info (device loop4): creating UUID tree
  Mar 22 10:45:17 onza kernel: [12631.574478] ------------[ cut here ]------------
  Mar 22 10:45:17 onza kernel: [12631.574482] kernel BUG at /build/linux-qJwW2z/linux-4.15.0/mm/highmem.c:350!
  Mar 22 10:45:17 onza kernel: [12631.630790] invalid opcode: 0000 [#1] SMP
  Mar 22 10:45:18 onza kernel: [12631.662771] Modules linked in: btrfs zstd_compress gpio_ich intel_powerclamp coretemp kvm_intel dcdbas kvm ipmi_ssif irqbypass input_leds joydev intel_cstate i7core_edac ipmi_si ipmi_devintf lpc_ich acpi_power_meter ipmi_msghandler shpchp mac_hid sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear mgag200 i2c_algo_bit ttm drm_kms_helper hid_generic syscopyarea sysfillrect sysimgblt fb_sys_fops usbhid hid mpt3sas drm pata_acpi bnx2 raid_class scsi_transport_sas wmi [last unloaded: zstd_compress]
  Mar 22 10:45:18 onza kernel: [12632.153647] CPU: 1 PID: 3852 Comm: kworker/u16:4 Not tainted 4.15.0-46-generic #49-Ubuntu
  Mar 22 10:45:18 onza kernel: [12632.219025] Hardware name: Dell Inc. PowerEdge R310/05XKKK, BIOS 1.11.0 09/18/2012
  Mar 22 10:45:18 onza kernel: [12632.279533] Workqueue: btrfs-rmw btrfs_rmw_helper [btrfs]
  Mar 22 10:45:18 onza kernel: [12632.322819] EIP: kunmap_high+0xaa/0xb0
  Mar 22 10:45:18 onza kernel: [12632.352697] EFLAGS: 00010246 CPU: 1
  Mar 22 10:45:18 onza kernel: [12632.380572] EAX: 00000028 EBX: fffff000 ECX: 00000001 EDX: 00000000
  Mar 22 10:45:18 onza kernel: [12632.430629] ESI: 00000005 EDI: 00000000 EBP: d3669e50 ESP: d3669e4c
  Mar 22 10:45:18 onza kernel: [12632.480686]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
  Mar 22 10:45:18 onza kernel: [12632.523881] CR0: 80050033 CR2: b542effc CR3: 17e16000 CR4: 000006f0
  Mar 22 10:45:18 onza kernel: [12632.573938] Call Trace:
  Mar 22 10:45:18 onza kernel: [12632.593428]  kunmap+0x3e/0x50
  Mar 22 10:45:18 onza kernel: [12632.617106]  finish_parity_scrub+0x24d/0x570 [btrfs]
  Mar 22 10:45:18 onza kernel: [12632.656764]  validate_rbio_for_parity_scrub+0xc2/0xd0 [btrfs]
  Mar 22 10:45:18 onza kernel: [12632.702800]  scrub_parity_work+0x24a/0x260 [btrfs]
  Mar 22 10:45:18 onza kernel: [12632.741072]  normal_work_helper+0x7d/0x2f0 [btrfs]
  Mar 22 10:45:18 onza kernel: [12632.779343]  btrfs_rmw_helper+0x10/0x20 [btrfs]
  Mar 22 10:45:18 onza kernel: [12632.815498]  process_one_work+0x1b9/0x3d0
  Mar 22 10:45:18 onza kernel: [12632.847459]  worker_thread+0x37/0x420
  Mar 22 10:45:18 onza kernel: [12632.876717]  kthread+0xf0/0x110
  Mar 22 10:45:18 onza kernel: [12632.901744]  ? process_one_work+0x3d0/0x3d0
  Mar 22 10:45:18 onza kernel: [12632.935164]  ? kthread_create_worker_on_cpu+0x20/0x20
  Mar 22 10:45:18 onza kernel: [12632.975448]  ret_from_fork+0x2e/0x38
  Mar 22 10:45:18 onza kernel: [12633.004009] Code: 2c ee ff 58 8b 5d fc c9 c3 90 8d b4 26 00 00 00 00 a1 a0 d1 c4 d7 31 c9 3d a0 d1 c4 d7 0f 95 c1 eb bc 8d b4 26 00 00 00 00 0f 0b <0f> 0b 8d 74 26 00 66 66 66 66 90 55 89 e5 56 53 31 db e8 2f ef
  Mar 22 10:45:18 onza kernel: [12633.154375] EIP: kunmap_high+0xaa/0xb0 SS:ESP: 0068:d3669e4c
  Mar 22 10:45:18 onza kernel: [12633.199643] ---[ end trace 84af65c59f943315 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-46-generic 4.15.0-46.49
  ProcVersionSignature: User Name 4.15.0-46.49-generic 4.15.18
  Uname: Linux 4.15.0-46-generic i686
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Mar 22 10:54 seq
   crw-rw---- 1 root audio 116, 33 Mar 22 10:54 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: i386
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Fri Mar 22 10:55:57 2019
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  MachineType: Dell Inc. PowerEdge R310
  PciMultimedia:

  ProcFB: 0 mgadrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-46-generic root=UUID=6aaa11f6-d386-4c0c-b4b8-38e6c408980a ro console=ttyS0,1152008n1
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-46-generic N/A
   linux-backports-modules-4.15.0-46-generic  N/A
   linux-firmware                             1.173.3
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/18/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.11.0
  dmi.board.name: 05XKKK
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A05
  dmi.chassis.type: 23
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr1.11.0:bd09/18/2012:svnDellInc.:pnPowerEdgeR310:pvr:rvnDellInc.:rn05XKKK:rvrA05:cvnDellInc.:ct23:cvr:
  dmi.product.name: PowerEdge R310
  dmi.sys.vendor: Dell Inc.

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