BUG: kernel NULL pointer dereference when running btrfs balance
From: John Wyzer <hidden>
Date: 2021-08-01 20:07:18
I'm trying to migrate my current btrfs filesystem to one that is backed by bcache. I added a new 3TB bcache device and ran "btrfs balance" and then planned to change each of the remaining disks to a bcache device, followed by a balance of the filesystem after each step. After starting "btrfs balance" withe the filesystem as shown below, I get the trace that I pasted at the end of the email. After that, the filesystem seems to be no longer writable until I reboot. I'm not sure where to best report this. But it seems to be btrfs related. Any ideas? Thanks for all the work! John. root@raspnas:/home/max# uname -a Linux raspnas 5.13.7-051307-generic #202107310732 SMP Sat Jul 31 07:53:42 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux # btrfs --version btrfs-progs v5.10.1 # btrfs fi show Label: none uuid: 0e0446ca-b914-4897-bff2-71d56dbe5627 Total devices 4 FS bytes used 3.32TiB devid 2 size 3.64TiB used 1.67TiB path /dev/sdd2 devid 3 size 3.64TiB used 1.66TiB path /dev/sde2 devid 4 size 2.73TiB used 1.65TiB path /dev/sdf1 devid 5 size 2.73TiB used 7.03GiB path /dev/bcache0 # btrfs fi df / Data, RAID5: total=3.31TiB, used=3.31TiB System, RAID1: total=32.00MiB, used=320.00KiB Metadata, RAID1: total=13.00GiB, used=12.40GiB GlobalReserve, single: total=512.00MiB, used=0.00B # [ 743.631308] BTRFS info (device sdd2): relocating block group 18309241110528 flags metadata|raid1 [ 823.916867] BTRFS info (device sdd2): found 65440 extents, stage: move data extents [ 855.482930] BTRFS info (device sdd2): relocating block group 18308167368704 flags metadata|raid1 [ 920.205777] BTRFS info (device sdd2): found 65476 extents, stage: move data extents [ 952.543924] BTRFS info (device sdd2): relocating block group 18259647660032 flags data|raid5 [ 961.081795] ------------[ cut here ]------------ [ 961.081802] WARNING: CPU: 2 PID: 639 at arch/x86/include/asm/kfence.h:44 kfence_unprotect+0x3c/0xa0 [ 961.081819] Modules linked in: dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq at24 snd_seq_device mei_hdcp intel_rapl_msr joydev snd_timer intel_rapl_common x86_pkg_temp_thermal snd input_leds mac_hid soundcore intel_powerclamp eeepc_wmi mei_me mei asus_wmi rapl wmi_bmof sparse_keymap intel_cstate sch_fq_codel nct6775 hwmon_vid coretemp msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear bcache crc64 raid1 hid_logitech_hidpp hid_logitech_dj hid_generic i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul syscopyarea sysfillrect usbhid ghash_clmulni_intel sysimgblt fb_sys_fops cec aesni_intel hid crypto_simd xhci_pci [ 961.081977] i2c_i801 rc_core ahci lpc_ich cryptd drm e1000e libahci i2c_smbus xhci_pci_renesas wmi video [ 961.082001] CPU: 2 PID: 639 Comm: kworker/u16:12 Not tainted 5.13.7-051307-generic #202107310732 [ 961.082008] Hardware name: ASUS All Series/H87I-PLUS, BIOS 2003 11/05/2014 [ 961.082013] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 961.082024] RIP: 0010:kfence_unprotect+0x3c/0xa0 [ 961.082032] Code: 49 89 fc 48 8d 75 ec 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 45 f0 31 c0 e8 8f 55 d9 ff 48 85 c0 74 06 83 7d ec 01 74 0f <0f> 0b 0f 0b c6 05 f9 79 e6 01 00 31 c0 eb 35 48 89 c2 48 8b 38 48 [ 961.082041] RSP: 0018:ffffc16f406b7278 EFLAGS: 00010046 [ 961.082051] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff9e010000 [ 961.082058] RDX: ffffc16f406b727c RSI: 0000000000000000 RDI: ffffffff9e010000 [ 961.082062] RBP: ffffc16f406b7290 R08: 0000000000000000 R09: 0000000000000000 [ 961.082066] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 961.082069] R13: ffffc16f406b7428 R14: ffffc16f406b7428 R15: 0000000000000000 [ 961.082073] FS: 0000000000000000(0000) GS:ffff9ea44fa80000(0000) knlGS:0000000000000000 [ 961.082079] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 961.082083] CR2: 00000000000000a8 CR3: 000000020de10001 CR4: 00000000001706e0 [ 961.082089] Call Trace: [ 961.082095] kfence_handle_page_fault+0x97/0x250 [ 961.082103] ? search_bpf_extables+0x5b/0x80 [ 961.082112] page_fault_oops+0x88/0x130 [ 961.082124] kernelmode_fixup_or_oops+0x92/0xf0 [ 961.082134] __bad_area_nosemaphore+0x14d/0x190 [ 961.082145] bad_area_nosemaphore+0x16/0x20 [ 961.082154] do_user_addr_fault+0x2a8/0x650 [ 961.082163] ? __sbitmap_get_word+0x36/0x80 [ 961.082176] exc_page_fault+0x7d/0x170 [ 961.082187] asm_exc_page_fault+0x1e/0x30 [ 961.082200] RIP: 0010:__blk_mq_sched_bio_merge+0xe0/0x110 [ 961.082212] Code: 49 83 44 24 78 01 4c 89 e7 c6 07 00 0f 1f 40 00 5b 44 89 c0 41 5c 41 5d 41 5e 41 5f 5d c3 31 c0 84 d2 0f 94 c0 49 8b 44 c4 50 <f6> 80 a8 00 00 00 01 75 91 eb 06 48 3b 58 10 75 a5 45 31 c0 5b 41 [ 961.082221] RSP: 0018:ffffc16f406b74d0 EFLAGS: 00010202 [ 961.082230] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc16f406b7520 [ 961.082237] RDX: 0000000000000001 RSI: ffff9ea1cf755978 RDI: ffff9ea153b32fa0 [ 961.082243] RBP: ffffc16f406b74f8 R08: 0000000000000101 R09: 00000000ffffffff [ 961.082251] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9ea44fa80000 [ 961.082257] R13: ffff9ea153b32fa0 R14: ffff9ea1cf755978 R15: 0000000000000003 [ 961.082271] blk_mq_submit_bio+0xce/0x580 [ 961.082288] __submit_bio_noacct_mq+0xa7/0x1c0 [ 961.082300] submit_bio_noacct+0x8b/0x90 [ 961.082310] submit_bio+0x4f/0x1b0 [ 961.082321] ? rbio_add_io_page+0x147/0x180 [btrfs] [ 961.082508] finish_rmw+0x43b/0x5b0 [btrfs] [ 961.082684] full_stripe_write+0xb1/0xc0 [btrfs] [ 961.082844] raid56_parity_write+0xf2/0x1b0 [btrfs] [ 961.082986] btrfs_map_bio+0x226/0x2d0 [btrfs] [ 961.083115] btrfs_submit_data_bio+0xc8/0x210 [btrfs] [ 961.083221] submit_one_bio+0x48/0x80 [btrfs] [ 961.083338] submit_extent_page+0x83/0x2c0 [btrfs] [ 961.083471] __extent_writepage_io+0x15b/0x380 [btrfs] [ 961.083603] ? end_extent_writepage.part.0+0xb0/0xb0 [btrfs] [ 961.083751] __extent_writepage+0x12d/0x340 [btrfs] [ 961.083885] extent_write_cache_pages.constprop.0+0x2af/0x4a0 [btrfs] [ 961.084016] ? vmalloc_to_page+0x1cf/0x370 [ 961.084030] extent_writepages+0x45/0xb0 [btrfs] [ 961.084162] btrfs_writepages+0xe/0x10 [btrfs] [ 961.084272] do_writepages+0x38/0xc0 [ 961.084280] __writeback_single_inode+0x44/0x1f0 [ 961.084288] writeback_sb_inodes+0x223/0x4d0 [ 961.084296] __writeback_inodes_wb+0x56/0xf0 [ 961.084303] wb_writeback+0x1dd/0x290 [ 961.084309] wb_do_writeback+0x152/0x160 [ 961.084316] wb_workfn+0x72/0x250 [ 961.084322] ? psi_task_switch+0xd2/0x250 [ 961.084332] ? __switch_to+0x11d/0x400 [ 961.084340] ? __switch_to_asm+0x36/0x70 [ 961.084353] process_one_work+0x220/0x3c0 [ 961.084363] worker_thread+0x50/0x370 [ 961.084372] kthread+0x11f/0x140 [ 961.084380] ? process_one_work+0x3c0/0x3c0 [ 961.084387] ? set_kthread_struct+0x50/0x50 [ 961.084395] ret_from_fork+0x22/0x30 [ 961.084408] ---[ end trace 5790a89e3d83d572 ]--- [ 961.084421] ------------[ cut here ]------------ [ 961.084423] WARNING: CPU: 2 PID: 639 at mm/kfence/core.c:135 kfence_unprotect+0x3e/0xa0 [ 961.084432] Modules linked in: dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq at24 snd_seq_device mei_hdcp intel_rapl_msr joydev snd_timer intel_rapl_common x86_pkg_temp_thermal snd input_leds mac_hid soundcore intel_powerclamp eeepc_wmi mei_me mei asus_wmi rapl wmi_bmof sparse_keymap intel_cstate sch_fq_codel nct6775 hwmon_vid coretemp msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear bcache crc64 raid1 hid_logitech_hidpp hid_logitech_dj hid_generic i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul syscopyarea sysfillrect usbhid ghash_clmulni_intel sysimgblt fb_sys_fops cec aesni_intel hid crypto_simd xhci_pci [ 961.084569] i2c_i801 rc_core ahci lpc_ich cryptd drm e1000e libahci i2c_smbus xhci_pci_renesas wmi video [ 961.084590] CPU: 2 PID: 639 Comm: kworker/u16:12 Tainted: G W 5.13.7-051307-generic #202107310732 [ 961.084597] Hardware name: ASUS All Series/H87I-PLUS, BIOS 2003 11/05/2014 [ 961.084600] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 961.084609] RIP: 0010:kfence_unprotect+0x3e/0xa0 [ 961.084616] Code: fc 48 8d 75 ec 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 45 f0 31 c0 e8 8f 55 d9 ff 48 85 c0 74 06 83 7d ec 01 74 0f 0f 0b <0f> 0b c6 05 f9 79 e6 01 00 31 c0 eb 35 48 89 c2 48 8b 38 48 89 f8 [ 961.084622] RSP: 0018:ffffc16f406b7278 EFLAGS: 00010046 [ 961.084628] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff9e010000 [ 961.084633] RDX: ffffc16f406b727c RSI: 0000000000000000 RDI: ffffffff9e010000 [ 961.084636] RBP: ffffc16f406b7290 R08: 0000000000000000 R09: 0000000000000000 [ 961.084640] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 961.084643] R13: ffffc16f406b7428 R14: ffffc16f406b7428 R15: 0000000000000000 [ 961.084647] FS: 0000000000000000(0000) GS:ffff9ea44fa80000(0000) knlGS:0000000000000000 [ 961.084653] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 961.084657] CR2: 00000000000000a8 CR3: 000000020de10001 CR4: 00000000001706e0 [ 961.084661] Call Trace: [ 961.084665] kfence_handle_page_fault+0x97/0x250 [ 961.084671] ? search_bpf_extables+0x5b/0x80 [ 961.084679] page_fault_oops+0x88/0x130 [ 961.084689] kernelmode_fixup_or_oops+0x92/0xf0 [ 961.084700] __bad_area_nosemaphore+0x14d/0x190 [ 961.084710] bad_area_nosemaphore+0x16/0x20 [ 961.084720] do_user_addr_fault+0x2a8/0x650 [ 961.084732] ? __sbitmap_get_word+0x36/0x80 [ 961.084748] exc_page_fault+0x7d/0x170 [ 961.084758] asm_exc_page_fault+0x1e/0x30 [ 961.084767] RIP: 0010:__blk_mq_sched_bio_merge+0xe0/0x110 [ 961.084775] Code: 49 83 44 24 78 01 4c 89 e7 c6 07 00 0f 1f 40 00 5b 44 89 c0 41 5c 41 5d 41 5e 41 5f 5d c3 31 c0 84 d2 0f 94 c0 49 8b 44 c4 50 <f6> 80 a8 00 00 00 01 75 91 eb 06 48 3b 58 10 75 a5 45 31 c0 5b 41 [ 961.084780] RSP: 0018:ffffc16f406b74d0 EFLAGS: 00010202 [ 961.084786] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc16f406b7520 [ 961.084789] RDX: 0000000000000001 RSI: ffff9ea1cf755978 RDI: ffff9ea153b32fa0 [ 961.084793] RBP: ffffc16f406b74f8 R08: 0000000000000101 R09: 00000000ffffffff [ 961.084796] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9ea44fa80000 [ 961.084799] R13: ffff9ea153b32fa0 R14: ffff9ea1cf755978 R15: 0000000000000003 [ 961.084807] blk_mq_submit_bio+0xce/0x580 [ 961.084819] __submit_bio_noacct_mq+0xa7/0x1c0 [ 961.084831] submit_bio_noacct+0x8b/0x90 [ 961.084840] submit_bio+0x4f/0x1b0 [ 961.084850] ? rbio_add_io_page+0x147/0x180 [btrfs] [ 961.085007] finish_rmw+0x43b/0x5b0 [btrfs] [ 961.085169] full_stripe_write+0xb1/0xc0 [btrfs] [ 961.085325] raid56_parity_write+0xf2/0x1b0 [btrfs] [ 961.085482] btrfs_map_bio+0x226/0x2d0 [btrfs] [ 961.085622] btrfs_submit_data_bio+0xc8/0x210 [btrfs] [ 961.085736] submit_one_bio+0x48/0x80 [btrfs] [ 961.085873] submit_extent_page+0x83/0x2c0 [btrfs] [ 961.086015] __extent_writepage_io+0x15b/0x380 [btrfs] [ 961.086145] ? end_extent_writepage.part.0+0xb0/0xb0 [btrfs] [ 961.086274] __extent_writepage+0x12d/0x340 [btrfs] [ 961.086406] extent_write_cache_pages.constprop.0+0x2af/0x4a0 [btrfs] [ 961.086535] ? vmalloc_to_page+0x1cf/0x370 [ 961.086548] extent_writepages+0x45/0xb0 [btrfs] [ 961.086681] btrfs_writepages+0xe/0x10 [btrfs] [ 961.086792] do_writepages+0x38/0xc0 [ 961.086800] __writeback_single_inode+0x44/0x1f0 [ 961.086806] writeback_sb_inodes+0x223/0x4d0 [ 961.086815] __writeback_inodes_wb+0x56/0xf0 [ 961.086821] wb_writeback+0x1dd/0x290 [ 961.086828] wb_do_writeback+0x152/0x160 [ 961.086835] wb_workfn+0x72/0x250 [ 961.086840] ? psi_task_switch+0xd2/0x250 [ 961.086850] ? __switch_to+0x11d/0x400 [ 961.086858] ? __switch_to_asm+0x36/0x70 [ 961.086869] process_one_work+0x220/0x3c0 [ 961.086879] worker_thread+0x50/0x370 [ 961.086887] kthread+0x11f/0x140 [ 961.086894] ? process_one_work+0x3c0/0x3c0 [ 961.086902] ? set_kthread_struct+0x50/0x50 [ 961.086909] ret_from_fork+0x22/0x30 [ 961.086922] ---[ end trace 5790a89e3d83d573 ]--- [ 961.086928] BUG: kernel NULL pointer dereference, address: 00000000000000a8 [ 961.091321] #PF: supervisor read access in kernel mode [ 961.095564] #PF: error_code(0x0000) - not-present page [ 961.099849] PGD 0 P4D 0 [ 961.104527] Oops: 0000 [#1] SMP PTI [ 961.108847] CPU: 2 PID: 639 Comm: kworker/u16:12 Tainted: G W 5.13.7-051307-generic #202107310732 [ 961.113236] Hardware name: ASUS All Series/H87I-PLUS, BIOS 2003 11/05/2014 [ 961.117536] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 961.122208] RIP: 0010:__blk_mq_sched_bio_merge+0xe0/0x110 [ 961.126563] Code: 49 83 44 24 78 01 4c 89 e7 c6 07 00 0f 1f 40 00 5b 44 89 c0 41 5c 41 5d 41 5e 41 5f 5d c3 31 c0 84 d2 0f 94 c0 49 8b 44 c4 50 <f6> 80 a8 00 00 00 01 75 91 eb 06 48 3b 58 10 75 a5 45 31 c0 5b 41 [ 961.131197] RSP: 0018:ffffc16f406b74d0 EFLAGS: 00010202 [ 961.135948] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc16f406b7520 [ 961.140681] RDX: 0000000000000001 RSI: ffff9ea1cf755978 RDI: ffff9ea153b32fa0 [ 961.145434] RBP: ffffc16f406b74f8 R08: 0000000000000101 R09: 00000000ffffffff [ 961.150216] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9ea44fa80000 [ 961.155286] R13: ffff9ea153b32fa0 R14: ffff9ea1cf755978 R15: 0000000000000003 [ 961.160224] FS: 0000000000000000(0000) GS:ffff9ea44fa80000(0000) knlGS:0000000000000000 [ 961.165716] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 961.170611] CR2: 00000000000000a8 CR3: 000000020de10001 CR4: 00000000001706e0 [ 961.175853] Call Trace: [ 961.180666] blk_mq_submit_bio+0xce/0x580 [ 961.185363] __submit_bio_noacct_mq+0xa7/0x1c0 [ 961.190189] submit_bio_noacct+0x8b/0x90 [ 961.194862] submit_bio+0x4f/0x1b0 [ 961.199467] ? rbio_add_io_page+0x147/0x180 [btrfs] [ 961.204232] finish_rmw+0x43b/0x5b0 [btrfs] [ 961.209305] full_stripe_write+0xb1/0xc0 [btrfs] [ 961.214220] raid56_parity_write+0xf2/0x1b0 [btrfs] [ 961.219158] btrfs_map_bio+0x226/0x2d0 [btrfs] [ 961.223752] btrfs_submit_data_bio+0xc8/0x210 [btrfs] [ 961.228553] submit_one_bio+0x48/0x80 [btrfs] [ 961.233046] submit_extent_page+0x83/0x2c0 [btrfs] [ 961.237781] __extent_writepage_io+0x15b/0x380 [btrfs] [ 961.242163] ? end_extent_writepage.part.0+0xb0/0xb0 [btrfs] [ 961.246468] __extent_writepage+0x12d/0x340 [btrfs] [ 961.250892] extent_write_cache_pages.constprop.0+0x2af/0x4a0 [btrfs] [ 961.255145] ? vmalloc_to_page+0x1cf/0x370 [ 961.259203] extent_writepages+0x45/0xb0 [btrfs] [ 961.263974] btrfs_writepages+0xe/0x10 [btrfs] [ 961.268215] do_writepages+0x38/0xc0 [ 961.272335] __writeback_single_inode+0x44/0x1f0 [ 961.276435] writeback_sb_inodes+0x223/0x4d0 [ 961.280456] __writeback_inodes_wb+0x56/0xf0 [ 961.284236] wb_writeback+0x1dd/0x290 [ 961.287955] wb_do_writeback+0x152/0x160 [ 961.291644] wb_workfn+0x72/0x250 [ 961.295378] ? psi_task_switch+0xd2/0x250 [ 961.299169] ? __switch_to+0x11d/0x400 [ 961.302864] ? __switch_to_asm+0x36/0x70 [ 961.307016] process_one_work+0x220/0x3c0 [ 961.310677] worker_thread+0x50/0x370 [ 961.314700] kthread+0x11f/0x140 [ 961.318248] ? process_one_work+0x3c0/0x3c0 [ 961.321722] ? set_kthread_struct+0x50/0x50 [ 961.325172] ret_from_fork+0x22/0x30 [ 961.328759] Modules linked in: dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq at24 snd_seq_device mei_hdcp intel_rapl_msr joydev snd_timer intel_rapl_common x86_pkg_temp_thermal snd input_leds mac_hid soundcore intel_powerclamp eeepc_wmi mei_me mei asus_wmi rapl wmi_bmof sparse_keymap intel_cstate sch_fq_codel nct6775 hwmon_vid coretemp msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear bcache crc64 raid1 hid_logitech_hidpp hid_logitech_dj hid_generic i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul syscopyarea sysfillrect usbhid ghash_clmulni_intel sysimgblt fb_sys_fops cec aesni_intel hid crypto_simd xhci_pci [ 961.328914] i2c_i801 rc_core ahci lpc_ich cryptd drm e1000e libahci i2c_smbus xhci_pci_renesas wmi video [ 961.353415] CR2: 00000000000000a8 [ 961.357635] ---[ end trace 5790a89e3d83d574 ]--- [ 961.361977] RIP: 0010:__blk_mq_sched_bio_merge+0xe0/0x110 [ 961.366201] Code: 49 83 44 24 78 01 4c 89 e7 c6 07 00 0f 1f 40 00 5b 44 89 c0 41 5c 41 5d 41 5e 41 5f 5d c3 31 c0 84 d2 0f 94 c0 49 8b 44 c4 50 <f6> 80 a8 00 00 00 01 75 91 eb 06 48 3b 58 10 75 a5 45 31 c0 5b 41 [ 961.370656] RSP: 0018:ffffc16f406b74d0 EFLAGS: 00010202 [ 961.375210] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc16f406b7520 [ 961.379816] RDX: 0000000000000001 RSI: ffff9ea1cf755978 RDI: ffff9ea153b32fa0 [ 961.384285] RBP: ffffc16f406b74f8 R08: 0000000000000101 R09: 00000000ffffffff [ 961.388735] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9ea44fa80000 [ 961.393158] R13: ffff9ea153b32fa0 R14: ffff9ea1cf755978 R15: 0000000000000003 [ 961.397621] FS: 0000000000000000(0000) GS:ffff9ea44fa80000(0000) knlGS:0000000000000000 [ 961.402306] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 961.407004] CR2: 00000000000000a8 CR3: 000000020de10001 CR4: 00000000001706e0 [ 961.411848] ------------[ cut here ]------------ [ 961.416303] WARNING: CPU: 2 PID: 639 at kernel/exit.c:739 do_exit+0x38/0x3e0 [ 961.420920] Modules linked in: dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq at24 snd_seq_device mei_hdcp intel_rapl_msr joydev snd_timer intel_rapl_common x86_pkg_temp_thermal snd input_leds mac_hid soundcore intel_powerclamp eeepc_wmi mei_me mei asus_wmi rapl wmi_bmof sparse_keymap intel_cstate sch_fq_codel nct6775 hwmon_vid coretemp msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear bcache crc64 raid1 hid_logitech_hidpp hid_logitech_dj hid_generic i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul syscopyarea sysfillrect usbhid ghash_clmulni_intel sysimgblt fb_sys_fops cec aesni_intel hid crypto_simd xhci_pci [ 961.421068] i2c_i801 rc_core ahci lpc_ich cryptd drm e1000e libahci i2c_smbus xhci_pci_renesas wmi video [ 961.451293] CPU: 2 PID: 639 Comm: kworker/u16:12 Tainted: G D W 5.13.7-051307-generic #202107310732 [ 961.456546] Hardware name: ASUS All Series/H87I-PLUS, BIOS 2003 11/05/2014 [ 961.461629] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 961.466785] RIP: 0010:do_exit+0x38/0x3e0 [ 961.471808] Code: 54 49 89 fc 53 65 48 8b 1c 25 c0 7b 01 00 48 83 ec 08 48 8b 83 48 0c 00 00 48 85 c0 74 0e 48 8b 10 48 39 d0 0f 84 db 02 00 00 <0f> 0b 65 8b 0d 0f a9 d6 63 f7 c1 00 ff ff 00 0f 85 a1 6f b3 00 8b [ 961.477190] RSP: 0018:ffffc16f406b7f20 EFLAGS: 00010016 [ 961.483240] RAX: ffffc16f406b7d00 RBX: ffff9ea155f548c0 RCX: 0000000000000000 [ 961.488700] RDX: ffff9ea156af7248 RSI: 0000000000000027 RDI: 0000000000000009 [ 961.494507] RBP: ffffc16f406b7f48 R08: 0000000000000000 R09: ffffc16f406b7040 [ 961.499910] R10: ffffc16f406b7038 R11: ffffffff9e155228 R12: 0000000000000009 [ 961.505313] R13: 0000000000000009 R14: 0000000000000009 R15: 0000000000000046 [ 961.511129] FS: 0000000000000000(0000) GS:ffff9ea44fa80000(0000) knlGS:0000000000000000 [ 961.516780] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 961.522300] CR2: 00000000000000a8 CR3: 000000020de10001 CR4: 00000000001706e0 [ 961.528173] Call Trace: [ 961.533775] ? set_kthread_struct+0x50/0x50 [ 961.539391] rewind_stack_do_exit+0x17/0x20 [ 961.545028] ---[ end trace 5790a89e3d83d575 ]---