watchdog: BUG: soft lockup - CPU#0 stuck for 121s! [syz-executor.4:26643] Modules linked in: irq event stamp: 23589319 hardirqs last enabled at (23589318): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (23589319): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (1655884): [] __do_softirq+0x664/0x9bf kernel/softirq.c:314 softirqs last disabled at (1657177): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (1657177): [] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 CPU: 0 PID: 26643 Comm: syz-executor.4 Not tainted 4.14.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888087b2c380 task.stack: ffff8882145c8000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff8880aec07940 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0f62cd1 RBX: 0000000000000282 RCX: 1ffff11010f65994 RDX: dffffc0000000000 RSI: ffff888087b2cc80 RDI: 0000000000000282 RBP: ffffffff87bfa4a0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000e0 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007fea0ba37700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d62015c008 CR3: 00000000a5b8e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] pcpu_alloc+0x37d/0xf70 mm/percpu.c:1447 ip6_dst_alloc+0x4f/0x1d0 net/ipv6/route.c:373 icmp6_dst_alloc+0x155/0x580 net/ipv6/route.c:1768 ndisc_send_skb+0xcff/0x1390 net/ipv6/ndisc.c:463 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x280/0x5a0 net/ipv6/addrconf.c:3765 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers+0x233/0x4d0 kernel/time/timer.c:1318 __run_timers kernel/time/timer.c:1636 [inline] run_timer_softirq+0x1d8/0x5b0 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5f0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611 RSP: 0018:ffff8882145cfb90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0f62cd3 RBX: dffffc0000000000 RCX: 1ffff11010f6598f RDX: 0000000000000000 RSI: ffff888087b2cc58 RDI: ffff888087b2cc04 RBP: ffffed1010f65870 R08: ffff88821fff701c R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888087b2c380 R13: ffffffff87b16698 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:perf_trace_init+0xd9/0xa50 kernel/trace/trace_event_perf.c:218 RSP: 0018:ffff8882145cfc68 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 000000000000060d RBX: ffffffff87e85a60 RCX: ffffc90007366000 RDX: 0000000000040000 RSI: ffffffff81605a99 RDI: ffffffff87e85aa0 RBP: ffff88806438e300 R08: 0000000000000001 R09: 0000000000000003 R10: ffff8882145cfc68 R11: ffff8882145cfbf7 R12: ffff88806438e300 R13: dffffc0000000000 R14: dffffc0000000000 R15: 00000000000000e7 perf_tp_event_init+0x79/0xf0 kernel/events/core.c:8127 perf_try_init_event+0x15b/0x1f0 kernel/events/core.c:9363 perf_init_event kernel/events/core.c:9401 [inline] perf_event_alloc.part.0+0xdd4/0x25c0 kernel/events/core.c:9661 perf_event_alloc kernel/events/core.c:10014 [inline] SYSC_perf_event_open kernel/events/core.c:10118 [inline] SyS_perf_event_open+0x68c/0x24b0 kernel/events/core.c:10004 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45cb19 RSP: 002b:00007fea0ba36c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00000000004fa640 RCX: 000000000045cb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000841 R14: 00000000004cb320 R15: 00007fea0ba376d4 Code: fb 48 c7 c0 88 66 b1 87 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d dc 11 73 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 b2 e8 c1 fa eb c0 0f 0b 0f 0b 48 c7 c7 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 17999 Comm: syz-executor.0 Not tainted 4.14.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888065688500 task.stack: ffff888062920000 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:preempt_count_sub+0x3b/0x130 kernel/sched/core.c:3131 RSP: 0018:ffff888062927808 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff86c449a0 RDI: 0000000000000001 RBP: ffff8880aa810040 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff81296c14 R14: ffffffffffffffff R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe3c529708 CR3: 000000009073b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1190 [inline] rcu_lockdep_current_cpu_online+0xed/0x140 kernel/rcu/tree.c:1177 rcu_read_lock_sched_held+0x92/0x130 kernel/rcu/update.c:113 trace_kmem_cache_free include/trace/events/kmem.h:144 [inline] kmem_cache_free+0x23a/0x2b0 mm/slab.c:3761 pte_lock_deinit include/linux/mm.h:1773 [inline] pgtable_page_dtor include/linux/mm.h:1805 [inline] ___pte_free_tlb+0x44/0xc0 arch/x86/mm/pgtable.c:59 __pte_free_tlb arch/x86/include/asm/pgalloc.h:73 [inline] free_pte_range mm/memory.c:449 [inline] free_pmd_range mm/memory.c:467 [inline] free_pud_range mm/memory.c:501 [inline] free_p4d_range mm/memory.c:534 [inline] free_pgd_range+0x87a/0xd10 mm/memory.c:614 free_pgtables+0x1ec/0x2b0 mm/memory.c:646 exit_mmap+0x280/0x4b0 mm/mmap.c:3057 __mmput kernel/fork.c:930 [inline] mmput kernel/fork.c:951 [inline] mmput+0xfa/0x3a0 kernel/fork.c:946 exit_mm kernel/exit.c:545 [inline] do_exit+0x93c/0x2ae0 kernel/exit.c:845 do_group_exit+0x100/0x2e0 kernel/exit.c:955 get_signal+0x385/0x1c90 kernel/signal.c:2423 do_signal+0x7c/0x15d0 arch/x86/kernel/signal.c:814 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: 0033:0x45cb19 RSP: 002b:00007f67fbdb0cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000078bf08 RCX: 000000000045cb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078bf08 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffd49c3083f R14: 00007f67fbdb19c0 R15: 000000000078bf0c Code: 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 c5 00 00 00 8b 0d 79 1e fa 08 85 c9 75 18 <65> 8b 05 3e f0 c3 7e 25 ff ff ff 7f 39 c3 7f 1a 81 fb fe 00 00