EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, ================================ WARNING: inconsistent lock state 4.17.0-rc2+ #18 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. loop0/18552 [HC1[1]:SC0[0]:HE0:SE1] takes: (ptrval) (fs_reclaim){?.+.}, at: fs_reclaim_acquire.part.82+0x0/0x30 mm/page_alloc.c:463 {HARDIRQ-ON-W} state was registered at: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x39/0x770 mm/slab.c:3661 kmalloc_node include/linux/slab.h:550 [inline] kzalloc_node include/linux/slab.h:712 [inline] alloc_worker+0xbd/0x2e0 kernel/workqueue.c:1704 init_rescuer.part.25+0x1f/0x190 kernel/workqueue.c:4000 init_rescuer kernel/workqueue.c:3997 [inline] workqueue_init+0x51f/0x7d0 kernel/workqueue.c:5732 kernel_init_freeable+0x2ad/0x58e init/main.c:1115 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 irq event stamp: 1768 hardirqs last enabled at (1767): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (1767): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (1767): [] ktime_get+0x33e/0x430 kernel/time/timekeeping.c:738 hardirqs last disabled at (1768): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1500): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1479): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1479): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(fs_reclaim); lock(fs_reclaim); *** DEADLOCK *** 2 locks held by loop0/18552: #0: (ptrval) (rcu_read_lock){....}, at: hctx_lock+0x7a/0x1d0 block/blk-mq.c:570 #1: (ptrval) (rcu_read_lock){....}, at: blk_rq_is_passthrough include/linux/blkdev.h:297 [inline] #1: (ptrval) (rcu_read_lock){....}, at: blk_do_io_stat block/blk.h:300 [inline] #1: (ptrval) (rcu_read_lock){....}, at: blk_account_io_completion+0xea/0x490 block/blk-core.c:2718 stack backtrace: CPU: 0 PID: 18552 Comm: loop0 Not tainted 4.17.0-rc2+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 print_usage_bug.cold.59+0x320/0x41a kernel/locking/lockdep.c:2542 valid_state kernel/locking/lockdep.c:2555 [inline] mark_lock_irq kernel/locking/lockdep.c:2749 [inline] mark_lock+0x1034/0x19e0 kernel/locking/lockdep.c:3147 mark_irqflags kernel/locking/lockdep.c:3022 [inline] __lock_acquire+0x1595/0x5140 kernel/locking/lockdep.c:3388 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739 fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x45/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254 handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642 RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94 RSP: 0018:ffff8801aacdf460 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffda RAX: ffffffff833cdaca RBX: ffff8801d284d200 RCX: ffffffff833cdb0c RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8801aacdf4a0 R08: ffff8801d76b2580 R09: 0000000000000001 R10: ffff8801d76b2de0 R11: ffff8801d76b2580 R12: 0000000000000001 R13: 0000000000001000 R14: 0000000000000000 R15: ffff8801d284d200 blk_update_request+0x14c/0xcb0 block/blk-core.c:3088 blk_mq_end_request+0x5a/0x1f0 block/blk-mq.c:507 lo_complete_rq+0x1b8/0x270 drivers/block/loop.c:482 __blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:551 blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:636 loop_handle_cmd drivers/block/loop.c:1777 [inline] loop_queue_work+0x31e/0x3a08 drivers/block/loop.c:1786 kthread_worker_fn+0x357/0xa30 kernel/kthread.c:642 loop_kthread_worker_fn+0x51/0x60 drivers/block/loop.c:863 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 18552, name: loop0 INFO: lockdep is turned off. irq event stamp: 1768 hardirqs last enabled at (1767): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (1767): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (1767): [] ktime_get+0x33e/0x430 kernel/time/timekeeping.c:738 hardirqs last disabled at (1768): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1500): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1479): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1479): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 18552 Comm: loop0 Not tainted 4.17.0-rc2+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 ___might_sleep.cold.87+0x11f/0x13a kernel/sched/core.c:6188 __might_sleep+0x95/0x190 kernel/sched/core.c:6141 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x2b9/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254 handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642 RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94 RSP: 0018:ffff8801aacdf460 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffda RAX: ffffffff833cdaca RBX: ffff8801d284d200 RCX: ffffffff833cdb0c RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8801aacdf4a0 R08: ffff8801d76b2580 R09: 0000000000000001 R10: ffff8801d76b2de0 R11: ffff8801d76b2580 R12: 0000000000000001 R13: 0000000000001000 R14: 0000000000000000 R15: ffff8801d284d200 blk_update_request+0x14c/0xcb0 block/blk-core.c:3088 blk_mq_end_request+0x5a/0x1f0 block/blk-mq.c:507 lo_complete_rq+0x1b8/0x270 drivers/block/loop.c:482 __blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:551 blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:636 loop_handle_cmd drivers/block/loop.c:1777 [inline] loop_queue_work+0x31e/0x3a08 drivers/block/loop.c:1786 kthread_worker_fn+0x357/0xa30 kernel/kthread.c:642 loop_kthread_worker_fn+0x51/0x60 drivers/block/loop.c:863 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 random: crng init done EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs: 334 callbacks suppressed EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, print_req_error: I/O error, dev loop0, sector 264184 EXT4-fs: 463 callbacks suppressed EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1, EXT4-fs (sda1): re-mounted. Opts: jqfmt=vfsv1,