watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.1:10159] Modules linked in: irq event stamp: 9850217 hardirqs last enabled at (9850216): [] trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41 hardirqs last disabled at (9850217): [] trace_hardirqs_off_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:42 softirqs last enabled at (4929026): [] __do_softirq+0x6cd/0x98c kernel/softirq.c:319 softirqs last disabled at (4929397): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (4929397): [] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 CPU: 0 PID: 10159 Comm: syz-executor.1 Not tainted 5.4.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:nf_conntrack_in+0x7fa/0x1460 net/netfilter/nf_conntrack_core.c:1675 Code: 10 00 00 00 00 44 89 f0 48 8b 4d d0 65 48 33 0c 25 28 00 00 00 0f 85 fb 0a 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 01 b9 30 fb 89 de bf 07 00 00 00 e8 75 ba 30 fb 83 fb 07 0f 85 RSP: 0018:ffff88802d2097c0 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000102 RBX: 0000000000000000 RCX: ffffffff86441dee RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: ffff88802d209928 R08: ffff88800c854640 R09: fffffbfff17b1e79 R10: fffffbfff17b1e78 R11: 0000000000000003 R12: ffff88802c620680 R13: ffff88802c620680 R14: ffff88802c620680 R15: 0000000000000000 FS: 00007f55e6e6b700(0000) GS:ffff88802d200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c008667688 CR3: 0000000072f96000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ipv6_conntrack_local+0x1e/0x30 net/netfilter/nf_conntrack_proto.c:194 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0xbc/0x1e0 net/netfilter/core.c:512 nf_hook.constprop.0+0x3c9/0x560 include/linux/netfilter.h:262 NF_HOOK include/linux/netfilter.h:305 [inline] ndisc_send_skb+0x9e0/0x1490 net/ipv6/ndisc.c:505 ndisc_send_rs+0x134/0x720 net/ipv6/ndisc.c:699 addrconf_rs_timer+0x30f/0x6e0 net/ipv6/addrconf.c:3879 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x4f/0x80 kernel/locking/spinlock.c:199 Code: c0 68 34 53 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 12 2a 99 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 e7 6b 96 f9 65 8b 05 18 14 48 78 85 c0 74 06 41 RSP: 0018:ffff888071a57488 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff12a668d RBX: ffff88800c854640 RCX: 0000000000000007 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88800c854ed4 RBP: ffff888071a57490 R08: 1ffffffff15d29ae R09: fffffbfff15d29af R10: fffffbfff15d29ae R11: ffffffff8ae94d77 R12: ffff88802d237380 R13: ffffffff8947a1c0 R14: ffff88802397cb80 R15: 0000000000000000 finish_lock_switch kernel/sched/core.c:3124 [inline] finish_task_switch+0x147/0x750 kernel/sched/core.c:3224 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x8e9/0x1f30 kernel/sched/core.c:4081 preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:4236 preempt_schedule+0x4b/0x60 kernel/sched/core.c:4261 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x3c/0x40 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:378 [inline] do_numa_page mm/memory.c:3791 [inline] handle_pte_fault mm/memory.c:3930 [inline] __handle_mm_fault+0x2a0a/0x3f00 mm/memory.c:4047 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4084 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xd80 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 do_async_page_fault+0x30/0xa0 arch/x86/kernel/kvm.c:252 async_page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1206 RIP: 0010:__get_user_8+0x21/0x33 arch/x86/lib/getuser.S:95 Code: 01 ca c3 66 0f 1f 44 00 00 48 83 c0 07 72 2d 65 48 8b 14 25 c0 1e 02 00 48 3b 82 90 14 00 00 73 1b 48 19 d2 48 21 d0 0f 01 cb <48> 8b 50 f9 31 c0 0f 01 ca c3 0f 1f 44 00 00 0f 01 ca 31 d2 48 c7 RSP: 0018:ffff888071a579d0 EFLAGS: 00050206 RAX: 00007f55e6e6b9e7 RBX: 00007f55e6e6b9e0 RCX: 1ffff1100190a9d9 RDX: ffffffffffffffff RSI: ffffffff81a153e1 RDI: 0000000000000282 RBP: ffff888071a57af0 R08: 0000000000000002 R09: ffff88800c854ed0 R10: fffffbfff146dba0 R11: ffffffff8a36dd07 R12: ffff88800c855748 R13: 0000000000000001 R14: ffff88800c854640 R15: ffff88800c854640 futex_exit_release+0x1d/0x70 kernel/futex.c:3846 exit_mm_release+0x1b/0x30 kernel/fork.c:1322 exit_mm kernel/exit.c:440 [inline] do_exit+0x407/0x2ef0 kernel/exit.c:784 do_group_exit+0x135/0x360 kernel/exit.c:895 get_signal+0x47c/0x24f0 kernel/signal.c:2734 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a759 Code: bd b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 8b b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f55e6e6ac88 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000008 RBX: 000000000071bfa8 RCX: 000000000045a759 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000800 RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f55e6e6b6d4 R13: 00000000004aec2b R14: 00000000006f1ca8 R15: 00000000ffffffff Sending NMI from CPU 0 to CPUs 1-3: NMI backtrace for cpu 2 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 NMI backtrace for cpu 3 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60