[ 53.851739][ T26] audit: type=1800 audit(1572376086.018:27): pid=8555 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 54.227567][ T8622] sshd (8622) used greatest stack depth: 22888 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 64.841273][ T8720] IPVS: ftp: loaded support on port[0] = 21 [ 65.950152][ T8725] can: request_module (can-proto-0) failed. [ 68.738063][ T8725] can: request_module (can-proto-0) failed. Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts. [ 75.584707][ T1083] [ 75.587067][ T1083] ===================================================== [ 75.593988][ T1083] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 75.601434][ T1083] 5.4.0-rc5-next-20191028+ #0 Not tainted [ 75.607143][ T1083] ----------------------------------------------------- [ 75.614156][ T1083] khugepaged/1083 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: [ 75.621767][ T1083] ffff888090de7928 (&sb->s_type->i_lock_key#23){+.+.}, at: __filemap_fdatawrite_range+0x26e/0x3b0 [ 75.632440][ T1083] 2019/10/29 19:08:27 parsed 1 programs [ 75.632440][ T1083] and this task is already holding: [ 75.639779][ T1083] ffff888090de7ab0 (&(&xa->xa_lock)->rlock#4){..-.}, at: collapse_file+0x24d/0x4580 [ 75.649131][ T1083] which would create a new lock dependency: [ 75.655001][ T1083] (&(&xa->xa_lock)->rlock#4){..-.} -> (&sb->s_type->i_lock_key#23){+.+.} [ 75.663592][ T1083] [ 75.663592][ T1083] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 75.673027][ T1083] (&(&xa->xa_lock)->rlock#4){..-.} [ 75.673051][ T1083] [ 75.673051][ T1083] ... which became SOFTIRQ-irq-safe at: [ 75.685929][ T1083] lock_acquire+0x190/0x410 [ 75.690519][ T1083] _raw_spin_lock_irqsave+0x95/0xcd [ 75.695807][ T1083] test_clear_page_writeback+0x1da/0x11b0 [ 75.701605][ T1083] end_page_writeback+0x244/0x530 [ 75.706707][ T1083] end_buffer_async_write+0x679/0x980 [ 75.712160][ T1083] end_bio_bh_io_sync+0xed/0x140 [ 75.717179][ T1083] bio_endio+0x609/0xaf0 [ 75.721504][ T1083] blk_update_request+0x49e/0x10d0 [ 75.726693][ T1083] scsi_end_request+0x7f/0x830 [ 75.731537][ T1083] scsi_io_completion+0x20a/0x1420 [ 75.736726][ T1083] scsi_finish_command+0x3b7/0x670 [ 75.741915][ T1083] scsi_softirq_done+0x326/0x3b0 [ 75.746932][ T1083] blk_done_softirq+0x2fe/0x4d0 [ 75.751863][ T1083] __do_softirq+0x262/0x98c [ 75.756452][ T1083] irq_exit+0x19b/0x1e0 [ 75.760690][ T1083] do_IRQ+0xe3/0x280 [ 75.764669][ T1083] ret_from_intr+0x0/0x36 [ 75.769082][ T1083] native_safe_halt+0xe/0x10 [ 75.773752][ T1083] arch_cpu_idle+0xa/0x10 [ 75.778172][ T1083] default_idle_call+0x84/0xb0 [ 75.783014][ T1083] do_idle+0x3b7/0x6e0 [ 75.787170][ T1083] cpu_startup_entry+0x1b/0x20 [ 75.792016][ T1083] start_secondary+0x2f4/0x410 [ 75.796864][ T1083] secondary_startup_64+0xa4/0xb0 [ 75.801965][ T1083] [ 75.801965][ T1083] to a SOFTIRQ-irq-unsafe lock: [ 75.808964][ T1083] (&sb->s_type->i_lock_key#23){+.+.} [ 75.808977][ T1083] [ 75.808977][ T1083] ... which became SOFTIRQ-irq-unsafe at: [ 75.822205][ T1083] ... [ 75.822222][ T1083] lock_acquire+0x190/0x410 [ 75.829464][ T1083] _raw_spin_lock+0x2f/0x40 [ 75.834052][ T1083] iget_locked+0x320/0x4b0 [ 75.838565][ T1083] __ext4_iget+0x265/0x3e20 [ 75.843154][ T1083] ext4_fill_super+0x7b11/0xcdb0 [ 75.848173][ T1083] mount_bdev+0x304/0x3c0 [ 75.852582][ T1083] ext4_mount+0x35/0x40 [ 75.856821][ T1083] legacy_get_tree+0x108/0x220 [ 75.861669][ T1083] vfs_get_tree+0x8e/0x300 [ 75.866171][ T1083] do_mount+0x135a/0x1b50 [ 75.870587][ T1083] ksys_mount+0xdb/0x150 [ 75.874914][ T1083] do_mount_root+0x35/0x1d3 [ 75.879496][ T1083] mount_block_root+0x353/0x61d [ 75.884421][ T1083] mount_root+0x283/0x2cd [ 75.888825][ T1083] prepare_namespace+0x26f/0x2ae [ 75.893842][ T1083] kernel_init_freeable+0x5a0/0x5b9 [ 75.899126][ T1083] kernel_init+0x12/0x1bf [ 75.903545][ T1083] ret_from_fork+0x24/0x30 [ 75.908035][ T1083] [ 75.908035][ T1083] other info that might help us debug this: [ 75.908035][ T1083] [ 75.918342][ T1083] Possible interrupt unsafe locking scenario: [ 75.918342][ T1083] [ 75.926744][ T1083] CPU0 CPU1 [ 75.932100][ T1083] ---- ---- [ 75.937449][ T1083] lock(&sb->s_type->i_lock_key#23); [ 75.942808][ T1083] local_irq_disable(); [ 75.949548][ T1083] lock(&(&xa->xa_lock)->rlock#4); [ 75.957251][ T1083] lock(&sb->s_type->i_lock_key#23); [ 75.965126][ T1083] [ 75.968565][ T1083] lock(&(&xa->xa_lock)->rlock#4); [ 75.973932][ T1083] [ 75.973932][ T1083] *** DEADLOCK *** [ 75.973932][ T1083] [ 75.982066][ T1083] 1 lock held by khugepaged/1083: [ 75.987070][ T1083] #0: ffff888090de7ab0 (&(&xa->xa_lock)->rlock#4){..-.}, at: collapse_file+0x24d/0x4580 [ 75.996883][ T1083] [ 75.996883][ T1083] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 76.007278][ T1083] -> (&(&xa->xa_lock)->rlock#4){..-.} { [ 76.012819][ T1083] IN-SOFTIRQ-W at: [ 76.016798][ T1083] lock_acquire+0x190/0x410 [ 76.022952][ T1083] _raw_spin_lock_irqsave+0x95/0xcd [ 76.029794][ T1083] test_clear_page_writeback+0x1da/0x11b0 [ 76.037156][ T1083] end_page_writeback+0x244/0x530 [ 76.043819][ T1083] end_buffer_async_write+0x679/0x980 [ 76.050829][ T1083] end_bio_bh_io_sync+0xed/0x140 [ 76.057407][ T1083] bio_endio+0x609/0xaf0 [ 76.063291][ T1083] blk_update_request+0x49e/0x10d0 [ 76.070045][ T1083] scsi_end_request+0x7f/0x830 [ 76.076461][ T1083] scsi_io_completion+0x20a/0x1420 [ 76.083210][ T1083] scsi_finish_command+0x3b7/0x670 [ 76.089971][ T1083] scsi_softirq_done+0x326/0x3b0 [ 76.096549][ T1083] blk_done_softirq+0x2fe/0x4d0 [ 76.103041][ T1083] __do_softirq+0x262/0x98c [ 76.109183][ T1083] irq_exit+0x19b/0x1e0 [ 76.114981][ T1083] do_IRQ+0xe3/0x280 [ 76.120519][ T1083] ret_from_intr+0x0/0x36 [ 76.126749][ T1083] native_safe_halt+0xe/0x10 [ 76.133071][ T1083] arch_cpu_idle+0xa/0x10 [ 76.139044][ T1083] default_idle_call+0x84/0xb0 [ 76.145457][ T1083] do_idle+0x3b7/0x6e0 [ 76.151173][ T1083] cpu_startup_entry+0x1b/0x20 [ 76.157666][ T1083] start_secondary+0x2f4/0x410 [ 76.164071][ T1083] secondary_startup_64+0xa4/0xb0 [ 76.170728][ T1083] INITIAL USE at: [ 76.174619][ T1083] lock_acquire+0x190/0x410 [ 76.180788][ T1083] _raw_spin_lock_irq+0x60/0x80 [ 76.187195][ T1083] __add_to_page_cache_locked+0x677/0xec0 [ 76.194478][ T1083] add_to_page_cache_lru+0x1d8/0x790 [ 76.201320][ T1083] do_read_cache_page+0x9fc/0x2140 [ 76.207980][ T1083] read_cache_page+0x5e/0x70 [ 76.214128][ T1083] read_dev_sector+0x71/0x310 [ 76.220360][ T1083] adfspart_check_ICS+0x12d/0xc90 [ 76.226950][ T1083] check_partition+0x3bc/0x6ce 2019/10/29 19:08:28 executed programs: 0 [ 76.233266][ T1083] rescan_partitions+0x230/0xa30 [ 76.239767][ T1083] __blkdev_get+0xbae/0x1600 [ 76.245906][ T1083] blkdev_get+0x47/0x2c0 [ 76.251697][ T1083] __device_add_disk+0xabf/0x1230 [ 76.258273][ T1083] device_add_disk+0x2b/0x40 [ 76.264412][ T1083] brd_init+0x237/0x41c [ 76.270122][ T1083] do_one_initcall+0x120/0x81a [ 76.276454][ T1083] kernel_init_freeable+0x4ca/0x5b9 [ 76.283207][ T1083] kernel_init+0x12/0x1bf [ 76.289092][ T1083] ret_from_fork+0x24/0x30 [ 76.295057][ T1083] } [ 76.297558][ T1083] ... key at: [] __key.18618+0x0/0x40 [ 76.305001][ T1083] ... acquired at: [ 76.308803][ T1083] lock_acquire+0x190/0x410 [ 76.313470][ T1083] _raw_spin_lock+0x2f/0x40 [ 76.318139][ T1083] __filemap_fdatawrite_range+0x26e/0x3b0 [ 76.324023][ T1083] filemap_flush+0x24/0x30 [ 76.328601][ T1083] collapse_file+0x3b28/0x4580 [ 76.333514][ T1083] khugepaged+0x2da9/0x4360 [ 76.338164][ T1083] kthread+0x361/0x430 [ 76.342381][ T1083] ret_from_fork+0x24/0x30 [ 76.346939][ T1083] [ 76.349240][ T1083] [ 76.349240][ T1083] the dependencies between the lock to be acquired [ 76.349243][ T1083] and SOFTIRQ-irq-unsafe lock: [ 76.362698][ T1083] -> (&sb->s_type->i_lock_key#23){+.+.} { [ 76.368393][ T1083] HARDIRQ-ON-W at: [ 76.372353][ T1083] lock_acquire+0x190/0x410 [ 76.378481][ T1083] _raw_spin_lock+0x2f/0x40 [ 76.384612][ T1083] iget_locked+0x320/0x4b0 [ 76.390655][ T1083] __ext4_iget+0x265/0x3e20 [ 76.396904][ T1083] ext4_fill_super+0x7b11/0xcdb0 [ 76.403469][ T1083] mount_bdev+0x304/0x3c0 [ 76.409422][ T1083] ext4_mount+0x35/0x40 [ 76.415201][ T1083] legacy_get_tree+0x108/0x220 [ 76.421590][ T1083] vfs_get_tree+0x8e/0x300 [ 76.427628][ T1083] do_mount+0x135a/0x1b50 [ 76.433583][ T1083] ksys_mount+0xdb/0x150 [ 76.439451][ T1083] do_mount_root+0x35/0x1d3 [ 76.445577][ T1083] mount_block_root+0x353/0x61d [ 76.452063][ T1083] mount_root+0x283/0x2cd [ 76.458016][ T1083] prepare_namespace+0x26f/0x2ae [ 76.464575][ T1083] kernel_init_freeable+0x5a0/0x5b9 [ 76.471396][ T1083] kernel_init+0x12/0x1bf [ 76.477349][ T1083] ret_from_fork+0x24/0x30 [ 76.483383][ T1083] SOFTIRQ-ON-W at: [ 76.487343][ T1083] lock_acquire+0x190/0x410 [ 76.493467][ T1083] _raw_spin_lock+0x2f/0x40 [ 76.499597][ T1083] iget_locked+0x320/0x4b0 [ 76.505638][ T1083] __ext4_iget+0x265/0x3e20 [ 76.511765][ T1083] ext4_fill_super+0x7b11/0xcdb0 [ 76.518326][ T1083] mount_bdev+0x304/0x3c0 [ 76.524275][ T1083] ext4_mount+0x35/0x40 [ 76.530057][ T1083] legacy_get_tree+0x108/0x220 [ 76.536443][ T1083] vfs_get_tree+0x8e/0x300 [ 76.542482][ T1083] do_mount+0x135a/0x1b50 [ 76.548433][ T1083] ksys_mount+0xdb/0x150 [ 76.554296][ T1083] do_mount_root+0x35/0x1d3 [ 76.560421][ T1083] mount_block_root+0x353/0x61d [ 76.566890][ T1083] mount_root+0x283/0x2cd [ 76.572844][ T1083] prepare_namespace+0x26f/0x2ae [ 76.579405][ T1083] kernel_init_freeable+0x5a0/0x5b9 [ 76.586224][ T1083] kernel_init+0x12/0x1bf [ 76.592177][ T1083] ret_from_fork+0x24/0x30 [ 76.598208][ T1083] INITIAL USE at: [ 76.602080][ T1083] lock_acquire+0x190/0x410 [ 76.608116][ T1083] _raw_spin_lock+0x2f/0x40 [ 76.614156][ T1083] iget_locked+0x320/0x4b0 [ 76.620109][ T1083] __ext4_iget+0x265/0x3e20 [ 76.626147][ T1083] ext4_fill_super+0x7b11/0xcdb0 [ 76.632620][ T1083] mount_bdev+0x304/0x3c0 [ 76.638480][ T1083] ext4_mount+0x35/0x40 [ 76.644171][ T1083] legacy_get_tree+0x108/0x220 [ 76.650471][ T1083] vfs_get_tree+0x8e/0x300 [ 76.656425][ T1083] do_mount+0x135a/0x1b50 [ 76.662290][ T1083] ksys_mount+0xdb/0x150 [ 76.668068][ T1083] do_mount_root+0x35/0x1d3 [ 76.674106][ T1083] mount_block_root+0x353/0x61d [ 76.680507][ T1083] mount_root+0x283/0x2cd [ 76.686378][ T1083] prepare_namespace+0x26f/0x2ae [ 76.692855][ T1083] kernel_init_freeable+0x5a0/0x5b9 [ 76.699592][ T1083] kernel_init+0x12/0x1bf [ 76.705457][ T1083] ret_from_fork+0x24/0x30 [ 76.711403][ T1083] } [ 76.713885][ T1083] ... key at: [] ext4_fs_type+0xa8/0x100 [ 76.721569][ T1083] ... acquired at: [ 76.725350][ T1083] lock_acquire+0x190/0x410 [ 76.729999][ T1083] _raw_spin_lock+0x2f/0x40 [ 76.734649][ T1083] __filemap_fdatawrite_range+0x26e/0x3b0 [ 76.740516][ T1083] filemap_flush+0x24/0x30 [ 76.745081][ T1083] collapse_file+0x3b28/0x4580 [ 76.749989][ T1083] khugepaged+0x2da9/0x4360 [ 76.754639][ T1083] kthread+0x361/0x430 [ 76.758857][ T1083] ret_from_fork+0x24/0x30 [ 76.763412][ T1083] [ 76.765717][ T1083] [ 76.765717][ T1083] stack backtrace: [ 76.771587][ T1083] CPU: 0 PID: 1083 Comm: khugepaged Not tainted 5.4.0-rc5-next-20191028+ #0 [ 76.780227][ T1083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.790255][ T1083] Call Trace: [ 76.793528][ T1083] dump_stack+0x172/0x1f0 [ 76.797833][ T1083] check_irq_usage.cold+0x586/0x6fe [ 76.803012][ T1083] ? check_usage_forwards+0x330/0x330 [ 76.808358][ T1083] ? lockdep_on+0x50/0x50 [ 76.819963][ T1083] ? check_path+0x26/0x40 [ 76.824265][ T1083] ? __kasan_check_read+0x11/0x20 [ 76.829286][ T1083] ? check_noncircular+0x16d/0x3e0 [ 76.834373][ T1083] ? print_circular_bug.isra.0+0x230/0x230 [ 76.840155][ T1083] ? lock_downgrade+0x920/0x920 [ 76.844986][ T1083] ? alloc_list_entry+0xc0/0xc0 [ 76.849814][ T1083] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.856029][ T1083] ? find_first_zero_bit+0x9a/0xc0 [ 76.861114][ T1083] __lock_acquire+0x25b4/0x4a00 [ 76.865936][ T1083] ? __lock_acquire+0x25b4/0x4a00 [ 76.870939][ T1083] ? mark_held_locks+0xf0/0xf0 [ 76.875678][ T1083] ? debug_smp_processor_id+0x33/0x18a [ 76.881122][ T1083] lock_acquire+0x190/0x410 [ 76.885599][ T1083] ? __filemap_fdatawrite_range+0x26e/0x3b0 [ 76.891467][ T1083] _raw_spin_lock+0x2f/0x40 [ 76.895942][ T1083] ? __filemap_fdatawrite_range+0x26e/0x3b0 [ 76.901812][ T1083] __filemap_fdatawrite_range+0x26e/0x3b0 [ 76.907505][ T1083] ? delete_from_page_cache_batch+0xfe0/0xfe0 [ 76.913549][ T1083] ? __xas_next+0x372/0x650 [ 76.918026][ T1083] filemap_flush+0x24/0x30 [ 76.922417][ T1083] collapse_file+0x3b28/0x4580 [ 76.927157][ T1083] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 76.933284][ T1083] ? khugepaged+0x2270/0x4360 [ 76.937944][ T1083] ? trace_event_raw_event_mm_collapse_huge_page_isolate+0x370/0x370 [ 76.945993][ T1083] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 76.951702][ T1083] ? khugepaged_find_target_node+0x142/0x180 [ 76.957660][ T1083] khugepaged+0x2da9/0x4360 [ 76.962142][ T1083] ? __kasan_check_read+0x11/0x20 [ 76.967143][ T1083] ? __lock_acquire+0x16f2/0x4a00 [ 76.972257][ T1083] ? _raw_spin_unlock_irq+0x23/0x80 [ 76.977441][ T1083] ? finish_task_switch+0x147/0x750 [ 76.982641][ T1083] ? _raw_spin_unlock_irq+0x23/0x80 [ 76.987819][ T1083] ? lockdep_hardirqs_on+0x421/0x5e0 [ 76.993085][ T1083] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 76.998695][ T1083] ? lock_downgrade+0x920/0x920 [ 77.003527][ T1083] ? finish_wait+0x260/0x260 [ 77.008092][ T1083] ? lockdep_hardirqs_on+0x421/0x5e0 [ 77.013351][ T1083] ? trace_hardirqs_on+0x67/0x240 [ 77.018357][ T1083] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.024570][ T1083] ? __kthread_parkme+0x108/0x1c0 [ 77.029569][ T1083] ? __kasan_check_read+0x11/0x20 [ 77.034565][ T1083] kthread+0x361/0x430 [ 77.038611][ T1083] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 77.044215][ T1083] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 77.049921][ T1083] ret_from_fork+0x24/0x30 [ 77.054317][ T1083] BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:38 [ 77.064003][ T1083] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1083, name: khugepaged [ 77.072991][ T1083] INFO: lockdep is turned off. [ 77.077724][ T1083] irq event stamp: 58 [ 77.081686][ T1083] hardirqs last enabled at (57): [] get_page_from_freelist+0x3437/0x4330 [ 77.091721][ T1083] hardirqs last disabled at (58): [] _raw_spin_lock_irq+0x3a/0x80 [ 77.101064][ T1083] softirqs last enabled at (0): [] copy_process+0x1822/0x6880 [ 77.110138][ T1083] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 77.117213][ T1083] Preemption disabled at: [ 77.117222][ T1083] [] collapse_file+0x24d/0x4580 [ 77.127935][ T1083] CPU: 0 PID: 1083 Comm: khugepaged Not tainted 5.4.0-rc5-next-20191028+ #0 [ 77.136577][ T1083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.146614][ T1083] Call Trace: [ 77.149887][ T1083] dump_stack+0x172/0x1f0 [ 77.154193][ T1083] ? collapse_file+0x24d/0x4580 [ 77.159024][ T1083] ___might_sleep.cold+0x1fb/0x23e [ 77.164116][ T1083] __might_sleep+0x95/0x190 [ 77.168607][ T1083] ext4_writepages+0x1cb/0x2e70 [ 77.173438][ T1083] ? lockdep_on+0x50/0x50 [ 77.177744][ T1083] ? check_path+0x26/0x40 [ 77.182047][ T1083] ? __kasan_check_read+0x11/0x20 [ 77.187055][ T1083] ? lock_downgrade+0x920/0x920 [ 77.191993][ T1083] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 77.197436][ T1083] ? alloc_list_entry+0xc0/0xc0 [ 77.202272][ T1083] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.208506][ T1083] ? find_first_zero_bit+0x9a/0xc0 [ 77.213600][ T1083] ? __lock_acquire+0x25b4/0x4a00 [ 77.218601][ T1083] ? __lock_acquire+0x25b4/0x4a00 [ 77.223606][ T1083] ? wbc_attach_and_unlock_inode+0x515/0x920 [ 77.229567][ T1083] ? ext4_mark_inode_dirty+0x9b0/0x9b0 [ 77.235008][ T1083] do_writepages+0xfa/0x2a0 [ 77.239493][ T1083] ? do_writepages+0xfa/0x2a0 [ 77.244144][ T1083] ? lock_downgrade+0x920/0x920 [ 77.248973][ T1083] ? page_writeback_cpu_online+0x20/0x20 [ 77.254578][ T1083] ? __kasan_check_read+0x11/0x20 [ 77.259591][ T1083] ? do_raw_spin_unlock+0x57/0x270 [ 77.264677][ T1083] ? _raw_spin_unlock+0x28/0x40 [ 77.269500][ T1083] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.275719][ T1083] ? wbc_attach_and_unlock_inode+0x5bf/0x920 [ 77.281673][ T1083] __filemap_fdatawrite_range+0x2bc/0x3b0 [ 77.287366][ T1083] ? delete_from_page_cache_batch+0xfe0/0xfe0 [ 77.293414][ T1083] ? __xas_next+0x372/0x650 [ 77.297893][ T1083] filemap_flush+0x24/0x30 [ 77.302286][ T1083] collapse_file+0x3b28/0x4580 [ 77.307024][ T1083] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 77.313153][ T1083] ? khugepaged+0x2270/0x4360 [ 77.317809][ T1083] ? trace_event_raw_event_mm_collapse_huge_page_isolate+0x370/0x370 [ 77.325855][ T1083] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 77.331546][ T1083] ? khugepaged_find_target_node+0x142/0x180 [ 77.337503][ T1083] khugepaged+0x2da9/0x4360 [ 77.341985][ T1083] ? __kasan_check_read+0x11/0x20 [ 77.346983][ T1083] ? __lock_acquire+0x16f2/0x4a00 [ 77.351983][ T1083] ? _raw_spin_unlock_irq+0x23/0x80 [ 77.357156][ T1083] ? finish_task_switch+0x147/0x750 [ 77.362328][ T1083] ? _raw_spin_unlock_irq+0x23/0x80 [ 77.367507][ T1083] ? lockdep_hardirqs_on+0x421/0x5e0 [ 77.372772][ T1083] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 77.378385][ T1083] ? lock_downgrade+0x920/0x920 [ 77.383210][ T1083] ? finish_wait+0x260/0x260 [ 77.387780][ T1083] ? lockdep_hardirqs_on+0x421/0x5e0 [ 77.393040][ T1083] ? trace_hardirqs_on+0x67/0x240 [ 77.398130][ T1083] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.404346][ T1083] ? __kthread_parkme+0x108/0x1c0 [ 77.409352][ T1083] ? __kasan_check_read+0x11/0x20 [ 77.414355][ T1083] kthread+0x361/0x430 [ 77.418402][ T1083] ? collapse_pte_mapped_thp+0xbe0/0xbe0 [ 77.424127][ T1083] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 77.429824][ T1083] ret_from_fork+0x24/0x30