IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 ================================ WARNING: inconsistent lock state 4.17.0-rc2+ #41 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. udevd/4577 [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: 232420 hardirqs last enabled at (232419): [] slab_alloc mm/slab.c:3385 [inline] hardirqs last enabled at (232419): [] kmem_cache_alloc+0x26f/0x760 mm/slab.c:3552 hardirqs last disabled at (232420): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (232124): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (232117): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (232117): [] 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 *** 3 locks held by udevd/4577: #0: (ptrval) (&dup_mmap_sem){.+.+}, at: dup_mmap kernel/fork.c:404 [inline] #0: (ptrval) (&dup_mmap_sem){.+.+}, at: dup_mm kernel/fork.c:1234 [inline] #0: (ptrval) (&dup_mmap_sem){.+.+}, at: copy_mm kernel/fork.c:1288 [inline] #0: (ptrval) (&dup_mmap_sem){.+.+}, at: copy_process.part.38+0x2429/0x6e90 kernel/fork.c:1794 #1: (ptrval) (&mm->mmap_sem){++++}, at: dup_mmap kernel/fork.c:405 [inline] #1: (ptrval) (&mm->mmap_sem){++++}, at: dup_mm kernel/fork.c:1234 [inline] #1: (ptrval) (&mm->mmap_sem){++++}, at: copy_mm kernel/fork.c:1288 [inline] #1: (ptrval) (&mm->mmap_sem){++++}, at: copy_process.part.38+0x2445/0x6e90 kernel/fork.c:1794 #2: (ptrval) (&mm->mmap_sem/1){+.+.}, at: dup_mmap kernel/fork.c:414 [inline] #2: (ptrval) (&mm->mmap_sem/1){+.+.}, at: dup_mm kernel/fork.c:1234 [inline] #2: (ptrval) (&mm->mmap_sem/1){+.+.}, at: copy_mm kernel/fork.c:1288 [inline] #2: (ptrval) (&mm->mmap_sem/1){+.+.}, at: copy_process.part.38+0x2499/0x6e90 kernel/fork.c:1794 stack backtrace: CPU: 0 PID: 4577 Comm: udevd Not tainted 4.17.0-rc2+ #41 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:update_stack_state+0x51b/0x670 arch/x86/kernel/unwind_frame.c:261 RSP: 0018:ffff8801ad1d6a68 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffda RAX: ffff8801ad1d6f50 RBX: ffff8801ad1d6f50 RCX: 1ffff10035a3ad00 RDX: 1ffff10035a3ad9a RSI: ffff8801ad1d6f60 RDI: ffff8801ad1d6cd0 RBP: ffff8801ad1d6b70 R08: ffff8801a