================================ WARNING: inconsistent lock state 4.17.0-rc2+ #22 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-fuzzer/4455 [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: 120712 hardirqs last enabled at (120711): [] swapgs_restore_regs_and_return_to_usermode+0x0/0x40 hardirqs last disabled at (120712): [] interrupt_entry+0x8b/0xf0 arch/x86/entry/entry_64.S:618 softirqs last enabled at (120710): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (120677): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (120677): [] 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-fuzzer/4455. stack backtrace: CPU: 1 PID: 4455 Comm: syz-fuzzer 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: 0033:0x40b55d RSP: 002b:000000c4234c1540 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffd5 RAX: 000000c420adb4f0 RBX: 00000000f2389203 RCX: 0000000000000000 RDX: 000000c420adb4f0 RSI: 00000000000038f2 RDI: 000000c420a14000 RBP: 000000c4234c1558 R08: 0000000000000009 R09: 000000c42054c1c0 R10: 0000000000000000 R11: 000000c42054c1ec R12: 0000000000000004 R13: 000000c42054c1d8 R14: 0000000000000090 R15: 000000c42054c1c0 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4455, name: syz-fuzzer INFO: lockdep is turned off. irq event stamp: 120712 hardirqs last enabled at (120711): [] swapgs_restore_regs_and_return_to_usermode+0x0/0x40 hardirqs last disabled at (120712): [] interrupt_entry+0x8b/0xf0 arch/x86/entry/entry_64.S:618 softirqs last enabled at (120710): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (120677): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (120677): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4455 Comm: syz-fuzzer 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: 0033:0x40b55d RSP: 002b:000000c4234c1540 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffd5 RAX: 000000c420adb4f0 RBX: 00000000f2389203 RCX: 0000000000000000 RDX: 000000c420adb4f0 RSI: 00000000000038f2 RDI: 000000c420a14000 RBP: 000000c4234c1558 R08: 0000000000000009 R09: 000000c42054c1c0 R10: 0000000000000000 R11: 000000c42054c1ec R12: 0000000000000004 R13: 000000c42054c1d8 R14: 0000000000000090 R15: 000000c42054c1c0 random: crng init done TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. RDS: rds_bind could not find a transport for 0.0.0.6, load rds_tcp or rds_rdma?