================================ WARNING: inconsistent lock state 4.19.164-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes: 000000001c188194 (hugetlb_lock){?.+.}, at: spin_lock include/linux/spinlock.h:329 [inline] 000000001c188194 (hugetlb_lock){?.+.}, at: free_huge_page+0x482/0xd20 mm/hugetlb.c:1276 {HARDIRQ-ON-W} state was registered at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] hugetlb_overcommit_handler+0x2d4/0x460 mm/hugetlb.c:2999 proc_sys_call_handler.isra.0+0x1f3/0x3b0 fs/proc/proc_sysctl.c:597 __vfs_write+0xf7/0x770 fs/read_write.c:485 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 121222 hardirqs last enabled at (121219): [] default_idle+0x17/0x310 arch/x86/kernel/process.c:557 hardirqs last disabled at (121220): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (121222): [] irq_enter+0xbd/0xd0 kernel/softirq.c:354 softirqs last disabled at (121221): [] irq_enter+0xa2/0xd0 kernel/softirq.c:358 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(hugetlb_lock); lock(hugetlb_lock); *** DEADLOCK *** 1 lock held by swapper/0/0: #0: 00000000da6fe65d (&(&virtscsi_vq->vq_lock)->rlock){-.-.}, at: virtscsi_vq_done drivers/scsi/virtio_scsi.c:219 [inline] #0: 00000000da6fe65d (&(&virtscsi_vq->vq_lock)->rlock){-.-.}, at: virtscsi_req_done+0x123/0x210 drivers/scsi/virtio_scsi.c:238 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.164-syzkaller #0 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+0x1fc/0x2fe lib/dump_stack.c:118 print_usage_bug.cold+0x42e/0x570 kernel/locking/lockdep.c:2544 valid_state kernel/locking/lockdep.c:2557 [inline] mark_lock_irq kernel/locking/lockdep.c:2751 [inline] mark_lock+0xc70/0x1160 kernel/locking/lockdep.c:3131 mark_irqflags kernel/locking/lockdep.c:3006 [inline] __lock_acquire+0x1077/0x3ff0 kernel/locking/lockdep.c:3372 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] free_huge_page+0x482/0xd20 mm/hugetlb.c:1276 __put_page+0xe2/0x3a0 mm/swap.c:112 put_page include/linux/mm.h:963 [inline] bio_release_pages+0x1cf/0x320 block/bio.c:1607 bio_check_pages_dirty+0x272/0x410 block/bio.c:1659 dio_bio_complete+0x567/0x710 fs/direct-io.c:552 dio_bio_end_aio+0x42/0x490 fs/direct-io.c:357 bio_endio+0x471/0x810 block/bio.c:1780 req_bio_endio block/blk-core.c:278 [inline] blk_update_request+0x30f/0xaf0 block/blk-core.c:3111 scsi_end_request+0x7d/0xb60 drivers/scsi/scsi_lib.c:673 scsi_io_completion+0x279/0x17c0 drivers/scsi/scsi_lib.c:1102 scsi_softirq_done+0x336/0x3d0 drivers/scsi/scsi_lib.c:1758 __blk_mq_complete_request block/blk-mq.c:583 [inline] blk_mq_complete_request+0x472/0x660 block/blk-mq.c:620 virtscsi_vq_done drivers/scsi/virtio_scsi.c:223 [inline] virtscsi_req_done+0x14b/0x210 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x12f/0x220 drivers/virtio/virtio_ring.c:953 __handle_irq_event_percpu+0x27e/0x8e0 kernel/irq/handle.c:149 handle_irq_event_percpu kernel/irq/handle.c:189 [inline] handle_irq_event+0x102/0x285 kernel/irq/handle.c:206 handle_edge_irq+0x260/0xcf0 kernel/irq/chip.c:797 generic_handle_irq_desc include/linux/irqdesc.h:155 [inline] handle_irq+0x35/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x93/0x1c0 arch/x86/kernel/irq.c:246 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: 48 89 df e8 44 1f 85 f9 e9 2e ff ff ff 48 89 df e8 37 1f 85 f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 14 aa 51 00 fb f4 90 e9 07 00 00 00 0f 00 2d 04 aa 51 00 f4 c3 90 90 41 56 41 55 RSP: 0018:ffffffff89e07d40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda RAX: 1ffffffff13e3034 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff89e78904 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f18190 R13: 1ffffffff13c0fb2 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x49/0x310 arch/x86/kernel/process.c:557 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x2ec/0x4b0 kernel/sched/idle.c:263 cpu_startup_entry+0xc5/0xe0 kernel/sched/idle.c:369