watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.2:9694] Modules linked in: irq event stamp: 4132927 hardirqs last enabled at (4132926): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4132927): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (45920): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (52617): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (52617): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9694 Comm: syz-executor.2 Not tainted 4.14.268-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880b4b926c0 task.stack: ffff88804c628000 RIP: 0010:unwind_next_frame+0xc80/0x17d0 arch/x86/kernel/unwind_orc.c:425 RSP: 0018:ffff8880ba4071d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880ba407ff8 RBX: 1ffff11017480e41 RCX: ffffffff8ae1a5c2 RDX: ffff8880ba4072d8 RSI: 0000000000000000 RDI: ffff8880ba407290 RBP: 0000000000000002 R08: ffffffff8ae1a5c6 R09: ffffffff8ae1a5c7 R10: 0000000000146c39 R11: 0000000000000001 R12: ffff8880ba4072c5 R13: ffff8880ba4072c8 R14: ffff8880ba4072e0 R15: ffff8880ba407290 FS: 00007fd898be9700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556718b22188 CR3: 00000000b3ff6000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550 kmem_cache_zalloc include/linux/slab.h:651 [inline] fill_pool lib/debugobjects.c:110 [inline] __debug_object_init+0x578/0x7a0 lib/debugobjects.c:341 debug_object_init lib/debugobjects.c:393 [inline] debug_object_activate+0x391/0x490 lib/debugobjects.c:474 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline] __call_rcu.constprop.0+0x31/0x7d0 kernel/rcu/tree.c:3050 neigh_destroy+0x343/0x460 net/core/neighbour.c:762 neigh_release include/net/neighbour.h:416 [inline] neigh_cleanup_and_release+0x9e/0xc0 net/core/neighbour.c:108 neigh_del+0x161/0x1f0 net/core/neighbour.c:141 neigh_forced_gc net/core/neighbour.c:190 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xc5d/0x19b0 net/core/neighbour.c:499 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3769 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:200 RSP: 0018:ffff88804c62f660 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e127b RBX: ffff88804c62f6d8 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880b4b92f44 RBP: ffff8880ba434380 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b4b926c0 R13: ffff8880ba434380 R14: ffff88804c628000 R15: ffff8880b4b926c0 rq_unlock_irq kernel/sched/sched.h:1766 [inline] __schedule+0x1450/0x1de0 kernel/sched/core.c:3390 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:3511 ___preempt_schedule+0x16/0x18 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] zap_pte_range mm/memory.c:1421 [inline] zap_pmd_range mm/memory.c:1466 [inline] zap_pud_range mm/memory.c:1495 [inline] zap_p4d_range mm/memory.c:1516 [inline] unmap_page_range+0x109e/0x1ce0 mm/memory.c:1537 unmap_single_vma+0x147/0x2b0 mm/memory.c:1582 unmap_vmas+0x9d/0x160 mm/memory.c:1612 exit_mmap+0x270/0x4d0 mm/mmap.c:3058 __mmput kernel/fork.c:931 [inline] mmput kernel/fork.c:952 [inline] mmput+0xfa/0x420 kernel/fork.c:947 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fd89a274049 RSP: 002b:00007fd898be9218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fd89a386f68 RCX: 00007fd89a274049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd89a386f68 RBP: 00007fd89a386f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd89a386f6c R13: 00007ffe5ebca92f R14: 00007fd898be9300 R15: 0000000000022000 Code: ff ff 4c 89 e7 48 89 4c 24 08 e8 7c 78 5b 00 48 8b 4c 24 08 e9 71 fe ff ff 48 8b 44 24 58 4c 89 ff 4c 89 4c 24 30 48 8b 54 24 08 <48> 89 4c 24 28 4c 89 44 24 20 48 8d 70 f8 48 89 44 24 18 e8 c8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9703 Comm: syz-executor.0 Not tainted 4.14.268-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880ab5f8240 task.stack: ffff88804c728000 RIP: 0010:trace_hardirqs_off_caller+0x22/0x2b0 kernel/locking/lockdep.c:2950 RSP: 0018:ffff8880ba507428 EFLAGS: 00000802 RAX: 0000000000000000 RBX: 00000000000894c0 RCX: 1ffffffff127a3f8 RDX: dffffc0000000000 RSI: ffffffff88f83720 RDI: ffffffff87242ad6 RBP: ffffffff87242ad6 R08: ffffffff8c03e388 R09: 00000000000c6051 R10: ffff8880ab5f8b90 R11: ffff8880ab5f8240 R12: 0000000000000086 R13: dffffc0000000000 R14: 1ffff110174a0e8f R15: ffff8880ba5074f8 FS: 00007f00cc7dd700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555560f0708 CR3: 000000009daf4000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:160 debug_object_activate+0x10f/0x490 lib/debugobjects.c:434 debug_hrtimer_activate kernel/time/hrtimer.c:401 [inline] debug_activate kernel/time/hrtimer.c:447 [inline] enqueue_hrtimer+0x22/0x3b0 kernel/time/hrtimer.c:844 __run_hrtimer kernel/time/hrtimer.c:1238 [inline] __hrtimer_run_queues+0x8e2/0xc80 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:queued_write_lock_slowpath+0x80/0x1d0 kernel/locking/qrwlock.c:130 RSP: 0018:ffff8880ba5077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 00000000000000ff RBX: ffffffff89d95630 RCX: 00000000000069cb RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89d95630 RBP: ffffffff89d95634 R08: ffffffff8b9d7918 R09: 00000000000421a4 R10: ffff8880ab5f8b68 R11: ffff8880ab5f8240 R12: fffffbfff13b2ac6 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880986f7680 queued_write_lock include/asm-generic/qrwlock.h:134 [inline] do_raw_write_lock+0xc2/0x1d0 kernel/locking/spinlock_debug.c:203 neigh_forced_gc net/core/neighbour.c:176 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xb34/0x19b0 net/core/neighbour.c:499 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3769 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff88804c72f7b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880ab5f8240 RBX: dffffc0000000000 RCX: ffff88804c72f9d0 RDX: 0000000000000000 RSI: ffff88804c72f9d0 RDI: ffffea0002cf8a48 RBP: ffff88809bbd6f80 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8880ab5f8240 R12: ffffea0002cf8a40 R13: ffffea0002cf8a60 R14: 00007f00cddf1000 R15: 0000000000000000 __read_once_size include/linux/compiler.h:185 [inline] compound_head include/linux/page-flags.h:147 [inline] PageAnon include/linux/page-flags.h:406 [inline] mm_counter include/linux/mm.h:1549 [inline] zap_pte_range mm/memory.c:1363 [inline] zap_pmd_range mm/memory.c:1466 [inline] zap_pud_range mm/memory.c:1495 [inline] zap_p4d_range mm/memory.c:1516 [inline] unmap_page_range+0xe61/0x1ce0 mm/memory.c:1537 unmap_single_vma+0x147/0x2b0 mm/memory.c:1582 unmap_vmas+0x9d/0x160 mm/memory.c:1612 exit_mmap+0x270/0x4d0 mm/mmap.c:3058 __mmput kernel/fork.c:931 [inline] mmput kernel/fork.c:952 [inline] mmput+0xfa/0x420 kernel/fork.c:947 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f00cdeec049 RSP: 002b:00007f00cc7dd218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f00cdfff2a8 RCX: 00007f00cdeec049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f00cdfff2a8 RBP: 00007f00cdfff2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00cdfff2ac R13: 00007fff2a691edf R14: 00007f00cc7dd300 R15: 0000000000022000 Code: 3d 00 eb cb 0f 1f 44 00 00 48 c7 c0 c0 1f 3d 89 41 54 48 ba 00 00 00 00 00 fc ff df 48 89 c1 55 83 e0 07 48 89 fd 48 c1 e9 03 53 <83> c0 03 0f b6 14 11 65 48 8b 1c 25 c0 7f 02 00 38 d0 7c 08 84 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff 4c 89 e7 decl -0x19(%rcx,%rcx,4) 4: 48 89 4c 24 08 mov %rcx,0x8(%rsp) 9: e8 7c 78 5b 00 callq 0x5b788a e: 48 8b 4c 24 08 mov 0x8(%rsp),%rcx 13: e9 71 fe ff ff jmpq 0xfffffe89 18: 48 8b 44 24 58 mov 0x58(%rsp),%rax 1d: 4c 89 ff mov %r15,%rdi 20: 4c 89 4c 24 30 mov %r9,0x30(%rsp) 25: 48 8b 54 24 08 mov 0x8(%rsp),%rdx * 2a: 48 89 4c 24 28 mov %rcx,0x28(%rsp) <-- trapping instruction 2f: 4c 89 44 24 20 mov %r8,0x20(%rsp) 34: 48 8d 70 f8 lea -0x8(%rax),%rsi 38: 48 89 44 24 18 mov %rax,0x18(%rsp) 3d: e8 .byte 0xe8 3e: c8 .byte 0xc8