Spotted on X / D / mainline 5.0rc2 as well. syslog for 5.0rc2: [ 157.662397] ------------[ cut here ]------------ [ 157.662401] kernel BUG at mm/highmem.c:349! [ 157.666725] invalid opcode: 0000 [#1] SMP PTI [ 157.671086] CPU: 1 PID: 162 Comm: kworker/u16:4 Not tainted 5.0.0-050000rc2-generic #201901171452 [ 157.680017] Hardware name: Dell Inc. PowerEdge R310/05XKKK, BIOS 1.11.0 09/18/2012 [ 157.687684] Workqueue: btrfs-endio-raid56 btrfs_endio_raid56_helper [btrfs] [ 157.694774] EIP: kunmap_high+0xb2/0xc0 [ 157.698661] Code: d4 8d b4 26 00 00 00 00 6a 00 b8 a0 d7 cf d9 b9 01 00 00 00 ba 03 00 00 00 e8 4a 79 ec ff 8b 5d fc 58 c9 c3 8d 74 26 00 0f 0b <0f> 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 66 66 66 66 90 55 89 e5 [ 157.717962] EAX: 000001d5 EBX: fffff000 ECX: 00000001 EDX: 00000000 [ 157.724560] ESI: 00000004 EDI: 00000004 EBP: f45dfe5c ESP: f45dfe58 [ 157.730918] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 [ 157.737962] CR0: 80050033 CR2: 0225610c CR3: 19eca000 CR4: 000006f0 [ 157.744384] Call Trace: [ 157.747009] kunmap+0x3e/0x50 [ 157.750192] finish_parity_scrub+0x315/0x570 [btrfs] [ 157.755316] validate_rbio_for_parity_scrub+0xca/0xd0 [btrfs] [ 157.761318] raid56_parity_scrub_end_io+0x53/0x70 [btrfs] [ 157.766833] bio_endio+0xee/0x150 [ 157.770333] ? end_workqueue_fn+0x2c/0x40 [btrfs] [ 157.775211] end_workqueue_fn+0x33/0x40 [btrfs] [ 157.779799] normal_work_helper+0xc5/0x2e0 [btrfs] [ 157.784868] btrfs_endio_raid56_helper+0x10/0x20 [btrfs] [ 157.790313] process_one_work+0x1d4/0x3a0 [ 157.794479] worker_thread+0x37/0x400 [ 157.798310] kthread+0xf0/0x110 [ 157.801620] ? pwq_unbound_release_workfn+0xb0/0xb0 [ 157.806656] ? kthread_park+0x90/0x90 [ 157.810478] ret_from_fork+0x2e/0x38 [ 157.814220] Modules linked in: intel_powerclamp coretemp kvm_intel dcdbas kvm ipmi_ssif irqbypass joydev input_leds ipmi_si intel_cstate acpi_power_meter mac_hid ipmi_devintf i7core_edac ipmi_msghandler 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 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic gpio_ich mgag200 i2c_algo_bit ttm drm_kms_helper syscopyarea usbhid sysfillrect hid sysimgblt mpt3sas fb_sys_fops drm pata_acpi raid_class lpc_ich bnx2 scsi_transport_sas wmi [ 157.873824] ---[ end trace f9b1fc7e1f35ab27 ]--- [ 157.887583] EIP: kunmap_high+0xb2/0xc0 [ 157.891437] Code: d4 8d b4 26 00 00 00 00 6a 00 b8 a0 d7 cf d9 b9 01 00 00 00 ba 03 00 00 00 e8 4a 79 ec ff 8b 5d fc 58 c9 c3 8d 74 26 00 0f 0b <0f> 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 66 66 66 66 90 55 89 e5 [ 157.910746] EAX: 000001d5 EBX: fffff000 ECX: 00000001 EDX: 00000000 [ 157.917276] ESI: 00000004 EDI: 00000004 EBP: f45dfe5c ESP: d9ed1e5c [ 157.923699] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 [ 157.930744] CR0: 80050033 CR2: 0225610c CR3: 19eca000 CR4: 000006f0
** Tags added: disco kernel-bug-exists-upstream xenial ** Also affects: ubuntu-kernel-tests Importance: Undecided Status: New ** Summary changed: - 3b080b2564287be91605bfd1d5ee985696e61d3c in ubuntu_btrfs_kernel_fixes triggers system hang on Bionic i386 + 3b080b2564287be91605bfd1d5ee985696e61d3c in ubuntu_btrfs_kernel_fixes triggers system hang on i386 -- 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/1812845 Title: 3b080b2564287be91605bfd1d5ee985696e61d3c in ubuntu_btrfs_kernel_fixes triggers system hang on i386 Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Confirmed Bug description: This issue was not spotted on AMD64 Reproduce rate: 100% The following command is the key to trigger this: btrfs scrub start -BR $MNT Steps: # (Install necessary packages) # git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests # TMP=/tmp/tmp MNT=/tmp/mnt # mkdir -p $TMP; mkdir -p $MNT # cd autotest-client-tests/ubuntu_btrfs_kernel_fixes # TMP=/tmp/tmp MNT=/tmp/mnt ./3b080b2564287be91605bfd1d5ee985696e61d3c.sh Trace: [ 494.357824] ------------[ cut here ]------------ [ 494.357828] kernel BUG at /build/linux-bnzN1b/linux-4.15.0/mm/highmem.c:350! [ 494.365079] invalid opcode: 0000 [#1] SMP [ 494.369205] Modules linked in: cfg80211 intel_powerclamp ipmi_ssif gpio_ich coretemp kvm_intel kvm ipmi_si irqbypass input_leds joydev dcdbas intel_cstate ipmi_devintf sch_fq_codel shpchp i7core_edac lpc_ich ipmi_msghandler acpi_power_meter mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress 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 usbhid sysimgblt mpt3sas fb_sys_fops drm hid raid_class bnx2 scsi_transport_sas pata_acpi wmi [ 494.430188] CPU: 2 PID: 2093 Comm: kworker/u16:1 Not tainted 4.15.0-43-generic #46-Ubuntu [ 494.438618] Hardware name: Dell Inc. PowerEdge R310/05XKKK, BIOS 1.11.0 09/18/2012 [ 494.446494] Workqueue: btrfs-endio-raid56 btrfs_endio_raid56_helper [btrfs] [ 494.453657] EIP: kunmap_high+0xaa/0xb0 [ 494.457571] EFLAGS: 00010246 CPU: 2 [ 494.461229] EAX: 00000115 EBX: fffff000 ECX: 00000001 EDX: 00000000 [ 494.467840] ESI: 00000004 EDI: 00000004 EBP: f4883e44 ESP: f4883e40 [ 494.474264] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 494.479931] CR0: 80050033 CR2: 005885e0 CR3: 0fe16000 CR4: 000006f0 [ 494.486353] Call Trace: [ 494.488967] kunmap+0x3e/0x50 [ 494.492140] finish_parity_scrub+0x24d/0x570 [btrfs] [ 494.497226] ? update_load_avg+0x64f/0x830 [ 494.501528] validate_rbio_for_parity_scrub+0xc2/0xd0 [btrfs] [ 494.507527] raid56_parity_scrub_end_io+0x53/0x70 [btrfs] [ 494.513058] bio_endio+0xb9/0x110 [ 494.516574] ? end_workqueue_fn+0x2c/0x40 [btrfs] [ 494.521435] end_workqueue_fn+0x33/0x40 [btrfs] [ 494.526139] normal_work_helper+0x7d/0x2f0 [btrfs] [ 494.531087] btrfs_endio_raid56_helper+0x10/0x20 [btrfs] [ 494.536621] process_one_work+0x1b9/0x3d0 [ 494.540799] worker_thread+0x37/0x420 [ 494.544628] kthread+0xf0/0x110 [ 494.547931] ? process_one_work+0x3d0/0x3d0 [ 494.552282] ? kthread_create_worker_on_cpu+0x20/0x20 [ 494.557488] ? kthread_create_worker_on_cpu+0x20/0x20 [ 494.562701] ret_from_fork+0x2e/0x38 [ 494.566441] Code: 2d ee ff 58 8b 5d fc c9 c3 90 8d b4 26 00 00 00 00 a1 80 d1 c4 cf 31 c9 3d 80 d1 c4 cf 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 1f ef [ 494.585751] EIP: kunmap_high+0xaa/0xb0 SS:ESP: 0068:f4883e40 [ 494.591688] ---[ end trace 5e6d708abb85eeba ]--- Follow up with CPU soft lockup. Please find the attachment for the complete log. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-43-generic 4.15.0-43.46 ProcVersionSignature: User Name 4.15.0-43.46-generic 4.15.18 Uname: Linux 4.15.0-43-generic i686 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jan 22 11:54 seq crw-rw---- 1 root audio 116, 33 Jan 22 11:54 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.5 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: Tue Jan 22 11:54:49 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-4.15.0-43-generic root=UUID=6aaa11f6-d386-4c0c-b4b8-38e6c408980a ro console=ttyS0,115200n8 RelatedPackageVersions: linux-restricted-modules-4.15.0-43-generic N/A linux-backports-modules-4.15.0-43-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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