================================ WARNING: inconsistent lock state 4.17.0-rc2+ #22 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor6/9582 [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: 2018 hardirqs last enabled at (2017): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (2017): [] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:192 hardirqs last disabled at (2018): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (2012): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (2005): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (2005): [] 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 *** no locks held by syz-executor6/9582. stack backtrace: CPU: 1 PID: 9582 Comm: syz-executor6 Not tainted 4.17.0-rc2+ #22 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:192 RSP: 0018:ffff8801ab6568a0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffd5 RAX: dffffc0000000000 RBX: ffff8801daf2c580 RCX: 0000000000000000 RDX: 1ffffffff11a315f RSI: 0000000000000001 RDI: ffffffff88d18af8 RBP: ffff8801ab6568a8 R08: ffffed003b5e58b1 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d49165c0 R13: ffff88019f7c24c0 R14: 0000000000000000 R15: ffff8801d49165c0 finish_lock_switch kernel/sched/core.c:2603 [inline] finish_task_switch+0x1ca/0x810 kernel/sched/core.c:2701 context_switch kernel/sched/core.c:2851 [inline] __schedule+0x809/0x1e30 kernel/sched/core.c:3490 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3629 _cond_resched+0x1d/0x30 kernel/sched/core.c:4978 zap_pmd_range mm/memory.c:1443 [inline] zap_pud_range mm/memory.c:1470 [inline] zap_p4d_range mm/memory.c:1491 [inline] unmap_page_range+0x120e/0x2200 mm/memory.c:1512 unmap_single_vma+0x1a0/0x310 mm/memory.c:1557 unmap_vmas+0x120/0x1f0 mm/memory.c:1587 exit_mmap+0x265/0x570 mm/mmap.c:3038 __mmput kernel/fork.c:961 [inline] mmput+0x251/0x610 kernel/fork.c:982 exit_mm kernel/exit.c:544 [inline] do_exit+0xe98/0x2730 kernel/exit.c:852 do_group_exit+0x16f/0x430 kernel/exit.c:968 get_signal+0x886/0x1960 kernel/signal.c:2469 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455979 RSP: 002b:00007fdc7f361ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 000000000072bec8 RCX: 0000000000455979 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8 RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000a3e81f R14: 00007fdc7f3629c0 R15: 0000000000000000 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 9582, name: syz-executor6 INFO: lockdep is turned off. irq event stamp: 2018 hardirqs last enabled at (2017): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (2017): [] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:192 hardirqs last disabled at (2018): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (2012): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (2005): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (2005): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 9582 Comm: syz-executor6 Not tainted 4.17.0-rc2+ #22 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:192 RSP: 0018:ffff8801ab6568a0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffd5 RAX: dffffc0000000000 RBX: ffff8801daf2c580 RCX: 0000000000000000 RDX: 1ffffffff11a315f RSI: 0000000000000001 RDI: ffffffff88d18af8 RBP: ffff8801ab6568a8 R08: ffffed003b5e58b1 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d49165c0 R13: ffff88019f7c24c0 R14: 0000000000000000 R15: ffff8801d49165c0 finish_lock_switch kernel/sched/core.c:2603 [inline] finish_task_switch+0x1ca/0x810 kernel/sched/core.c:2701 context_switch kernel/sched/core.c:2851 [inline] __schedule+0x809/0x1e30 kernel/sched/core.c:3490 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3629 _cond_resched+0x1d/0x30 kernel/sched/core.c:4978 zap_pmd_range mm/memory.c:1443 [inline] zap_pud_range mm/memory.c:1470 [inline] zap_p4d_range mm/memory.c:1491 [inline] unmap_page_range+0x120e/0x2200 mm/memory.c:1512 unmap_single_vma+0x1a0/0x310 mm/memory.c:1557 unmap_vmas+0x120/0x1f0 mm/memory.c:1587 exit_mmap+0x265/0x570 mm/mmap.c:3038 __mmput kernel/fork.c:961 [inline] mmput+0x251/0x610 kernel/fork.c:982 exit_mm kernel/exit.c:544 [inline] do_exit+0xe98/0x2730 kernel/exit.c:852 do_group_exit+0x16f/0x430 kernel/exit.c:968 get_signal+0x886/0x1960 kernel/signal.c:2469 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x6ac/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455979 RSP: 002b:00007fdc7f361ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 000000000072bec8 RCX: 0000000000455979 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec8 RBP: 000000000072bec8 R08: 0000000000000000 R09: 000000000072bea0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000a3e81f R14: 00007fdc7f3629c0 R15: 0000000000000000 random: crng init done kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain kernel msg: ebtables bug: please report to author: Valid hook without chain skbuff: bad partial csum: csum=65535/0 len=572 skbuff: bad partial csum: csum=65535/0 len=572 skbuff: bad partial csum: csum=65535/0 len=572 skbuff: bad partial csum: csum=65535/0 len=572