================================ WARNING: inconsistent lock state 4.17.0-rc2+ #14 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. sshd/4501 [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: 518288 hardirqs last enabled at (518287): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (518287): [] _raw_spin_unlock_irqrestore+0x74/0xc0 kernel/locking/spinlock.c:184 hardirqs last disabled at (518288): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (518276): [] spin_unlock_bh include/linux/spinlock.h:355 [inline] softirqs last enabled at (518276): [] release_sock+0x1e2/0x2b0 net/core/sock.c:2864 softirqs last disabled at (518274): [] spin_lock_bh include/linux/spinlock.h:315 [inline] softirqs last disabled at (518274): [] release_sock+0x74/0x2b0 net/core/sock.c:2851 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(fs_reclaim); lock(fs_reclaim); *** DEADLOCK *** no locks held by sshd/4501. stack backtrace: CPU: 0 PID: 4501 Comm: sshd Not tainted 4.17.0-rc2+ #14 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_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:ffff8801ad3df2b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd5 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 0000000000000000 RDX: 1ffffffff11a315d RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff8801ad3df2c8 R08: ffffed003a91ef69 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d48f7b40 R13: ffff8801d48f7b40 R14: ffff8801ad3df350 R15: ffff8801ad3df818 spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] add_wait_queue+0x1b4/0x2a0 kernel/sched/wait.c:24 __pollwait+0x259/0x430 fs/select.c:233 poll_wait include/linux/poll.h:47 [inline] sock_poll_wait include/net/sock.h:2003 [inline] tcp_poll+0x17e/0xd50 net/ipv4/tcp.c:510 sock_poll+0x2be/0x390 net/socket.c:1137 do_select+0xb94/0x1ae0 fs/select.c:512 core_sys_select+0x768/0xb60 fs/select.c:655 kern_select+0x1b7/0x250 fs/select.c:696 __do_sys_select fs/select.c:705 [inline] __se_sys_select fs/select.c:702 [inline] __x64_sys_select+0xbe/0x150 fs/select.c:702 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8a84b42dd3 RSP: 002b:00007ffcc05aa758 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 RAX: ffffffffffffffda RBX: 00007ffcc05aa7e0 RCX: 00007f8a84b42dd3 RDX: 000055e78f1f9ab0 RSI: 000055e78f1f9ad0 RDI: 000000000000000c RBP: 000055e78f0788dc R08: 00007ffcc05aa780 R09: 0101010101010101 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc05aa7e8 R13: 0000000000000000 R14: 00007ffcc05aa7d8 R15: 00007ffcc05aa7dc BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4501, name: sshd INFO: lockdep is turned off. irq event stamp: 518288 hardirqs last enabled at (518287): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (518287): [] _raw_spin_unlock_irqrestore+0x74/0xc0 kernel/locking/spinlock.c:184 hardirqs last disabled at (518288): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (518276): [] spin_unlock_bh include/linux/spinlock.h:355 [inline] softirqs last enabled at (518276): [] release_sock+0x1e2/0x2b0 net/core/sock.c:2864 softirqs last disabled at (518274): [] spin_lock_bh include/linux/spinlock.h:315 [inline] softirqs last disabled at (518274): [] release_sock+0x74/0x2b0 net/core/sock.c:2851 CPU: 0 PID: 4501 Comm: sshd Not tainted 4.17.0-rc2+ #14 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_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:ffff8801ad3df2b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd5 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 0000000000000000 RDX: 1ffffffff11a315d RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff8801ad3df2c8 R08: ffffed003a91ef69 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d48f7b40 R13: ffff8801d48f7b40 R14: ffff8801ad3df350 R15: ffff8801ad3df818 spin_unlock_irqrestore include/linux/spinlock.h:365 [inline] add_wait_queue+0x1b4/0x2a0 kernel/sched/wait.c:24 __pollwait+0x259/0x430 fs/select.c:233 poll_wait include/linux/poll.h:47 [inline] sock_poll_wait include/net/sock.h:2003 [inline] tcp_poll+0x17e/0xd50 net/ipv4/tcp.c:510 sock_poll+0x2be/0x390 net/socket.c:1137 do_select+0xb94/0x1ae0 fs/select.c:512 core_sys_select+0x768/0xb60 fs/select.c:655 kern_select+0x1b7/0x250 fs/select.c:696 __do_sys_select fs/select.c:705 [inline] __se_sys_select fs/select.c:702 [inline] __x64_sys_select+0xbe/0x150 fs/select.c:702 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8a84b42dd3 RSP: 002b:00007ffcc05aa758 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 RAX: ffffffffffffffda RBX: 00007ffcc05aa7e0 RCX: 00007f8a84b42dd3 RDX: 000055e78f1f9ab0 RSI: 000055e78f1f9ad0 RDI: 000000000000000c RBP: 000055e78f0788dc R08: 00007ffcc05aa780 R09: 0101010101010101 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc05aa7e8 R13: 0000000000000000 R14: 00007ffcc05aa7d8 R15: 00007ffcc05aa7dc random: crng init done