================================ WARNING: inconsistent lock state 4.17.0-rc1+ #12 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syzkaller403831/4506 [HC1[1]:SC1[1]:HE0:SE0] 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: 205311 hardirqs last enabled at (205310): [] __do_softirq+0x26d/0xaf5 kernel/softirq.c:269 hardirqs last disabled at (205311): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (205282): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (205309): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (205309): [] 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 *** 1 lock held by syzkaller403831/4506: #0: (ptrval) (&evdev->mutex){+.+.}, at: evdev_write+0x1cc/0x860 drivers/input/evdev.c:543 stack backtrace: CPU: 0 PID: 4506 Comm: syzkaller403831 Not tainted 4.17.0-rc1+ #12 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:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:__do_softirq+0x298/0xaf5 kernel/softirq.c:269 RSP: 0018:ffff8801dae07c98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda RAX: 1ffffffff11a312f RBX: ffff8801ad60c540 RCX: 1ffff10035ac19b3 RDX: 0000000000000000 RSI: ffff8801ad60cd78 RDI: ffff8801ad60cd74 RBP: ffff8801dae07e70 R08: ffff8801ad60cd78 R09: 0000000000000002 R10: ffff8801ad60c540 R11: 0000000000000000 R12: 1ffff1003b5c0fe0 R13: ffff8801dae07fc0 R14: 0000000000000000 R15: dffffc0000000000 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1d1/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:525 [inline] smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa1/0xc0 kernel/locking/spinlock.c:184 RSP: 0018:ffff8801d923f9d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 1ffff10035ac19b3 RDX: 1ffffffff11a312d RSI: ffff8801ad60cd78 RDI: 0000000000000286 RBP: ffff8801d923f9e8 R08: ffff8801ad60cd78 R09: 0000000000000006 R10: ffff8801ad60c540 R11: 0000000000000000 R12: ffff8801cdbd8f08 R13: ffff8801cc49aa88 R14: ffff8801cdbd8d00 R15: 0000000000000000 spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] input_inject_event+0x2b4/0x3ed drivers/input/input.c:469 evdev_write+0x4d1/0x860 drivers/input/evdev.c:560 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443db9 RSP: 002b:00007ffff5e2db28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0008000040000002 RCX: 0000000000443db9 RDX: 0000000000000030 RSI: 000000002023cfd0 RDI: 00000000000003ff RBP: 746e6576652f7475 R08: 00000000004002e0 R09: 00000000004002e0 R10: 0000000000000000 R11: 0000000000000246 R12: 706e692f7665642f R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4506, name: syzkaller403831 INFO: lockdep is turned off. irq event stamp: 205311 hardirqs last enabled at (205310): [] __do_softirq+0x26d/0xaf5 kernel/softirq.c:269 hardirqs last disabled at (205311): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (205282): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (205309): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (205309): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4506 Comm: syzkaller403831 Not tainted 4.17.0-rc1+ #12 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:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:__do_softirq+0x298/0xaf5 kernel/softirq.c:269 RSP: 0018:ffff8801dae07c98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda RAX: 1ffffffff11a312f RBX: ffff8801ad60c540 RCX: 1ffff10035ac19b3 RDX: 0000000000000000 RSI: ffff8801ad60cd78 RDI: ffff8801ad60cd74 RBP: ffff8801dae07e70 R08: ffff8801ad60cd78 R09: 0000000000000002 R10: ffff8801ad60c540 R11: 0000000000000000 R12: 1ffff1003b5c0fe0 R13: ffff8801dae07fc0 R14: 0000000000000000 R15: dffffc0000000000 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1d1/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:525 [inline] smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa1/0xc0 kernel/locking/spinlock.c:184 RSP: 0018:ffff8801d923f9d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 1ffff10035ac19b3 RDX: 1ffffffff11a312d RSI: ffff8801ad60cd78 RDI: 0000000000000286 RBP: ffff8801d923f9e8 R08: ffff8801ad60cd78 R09: 0000000000000006 R10: ffff8801ad60c540 R11: 0000000000000000 R12: ffff8801cdbd8f08 R13: ffff8801cc49aa88 R14: ffff8801cdbd8d00 R15: 0000000000000000 spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] input_inject_event+0x2b4/0x3ed drivers/input/input.c:469 evdev_write+0x4d1/0x860 drivers/input/evdev.c:560 __vfs_write+0x10b/0x960 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443db9 RSP: 002b:00007ffff5e2db28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0008000040000002 RCX: 0000000000443db9 RDX: 0000000000000030 RSI: 000000002023cfd0 RDI: 00000000000003ff RBP: 746e6576652f7475 R08: 00000000004002e0 R09: 00000000004002e0 R10: 0000000000000000 R11: 0000000000000246 R12: 706e692f7665642f R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 random: crng init done