watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.2.97:5790] Modules linked in: irq event stamp: 11177685 hardirqs last enabled at (11177684): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11177685): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1037 softirqs last enabled at (9804722): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (9804722): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (9804722): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (9804725): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (9804725): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (9804725): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 1 UID: 0 PID: 5790 Comm: syz.2.97 Not tainted 6.11.0-syzkaller-10574-g93eeaab4563c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:perf_trace_lock+0x7f/0x490 include/trace/events/lock.h:50 Code: 41 48 c7 44 24 68 f6 a1 07 8e 48 c7 44 24 70 90 1d 6f 81 48 8d 4c 24 60 48 c1 e9 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 21 <48> 89 4c 24 58 42 c7 44 21 08 04 f3 f3 f3 48 89 f8 48 c1 e8 03 48 RSP: 0018:ffffc90000a183c0 EFLAGS: 00000a06 RAX: f2f2f200f1f1f1f1 RBX: ffffc90000a18460 RCX: 1ffff92000143084 RDX: ffffffff89951a95 RSI: ffff88803008e040 RDI: ffffc90000a18440 RBP: ffffc90000a184d0 R08: ffffffff901ce1ef R09: 1ffffffff2039c3d R10: dffffc0000000000 R11: fffffbfff2039c3e R12: dffffc0000000000 R13: ffffffff89951a95 R14: ffff88803008e040 R15: ffffffff8e8025c0 FS: 00007f93d5a336c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004d408000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x9cc/0xa30 kernel/locking/lockdep.c:5833 __raw_write_unlock include/linux/rwlock_api_smp.h:224 [inline] _raw_write_unlock+0x16/0x50 kernel/locking/spinlock.c:342 neigh_del net/core/neighbour.c:223 [inline] neigh_remove_one+0x5c5/0x6e0 net/core/neighbour.c:246 neigh_forced_gc net/core/neighbour.c:279 [inline] neigh_alloc net/core/neighbour.c:485 [inline] ___neigh_create+0x43c/0x2470 net/core/neighbour.c:648 ip6_finish_output2+0x1700/0x1730 net/ipv6/ip6_output.c:132 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4042 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5790 Comm: syz.2.97 Not tainted 6.11.0-syzkaller-10574-g93eeaab4563c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406 Code: f0 93 4b fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 61 41 b5 fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c RSP: 0018:ffffc90000a17798 EFLAGS: 00000006 RAX: 1ffffffff34e0905 RBX: ffffffff9a704e60 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020 RBP: 0000000000000000 R08: ffffffff85492146 R09: fffff52000142ed4 R10: dffffc0000000000 R11: ffffffff85492100 R12: dffffc0000000000 R13: 1ffff92000142f10 R14: 00000000000003f9 R15: dffffc0000000000 FS: 00007f93d5a336c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004d408000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_port_in include/linux/serial_core.h:787 [inline] serial8250_console_write+0x4de/0x1ed0 drivers/tty/serial/8250/8250_port.c:3357 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3180 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407 _printk+0xd5/0x120 kernel/printk/printk.c:2432 printk_stack_address arch/x86/kernel/dumpstack.c:72 [inline] show_trace_log_lvl+0x38a/0x410 arch/x86/kernel/dumpstack.c:285 watchdog_timer_fn+0x75b/0x960 kernel/watchdog.c:759 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x551/0xd50 kernel/time/hrtimer.c:1755 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_lock+0x7f/0x490 include/trace/events/lock.h:50 Code: 41 48 c7 44 24 68 f6 a1 07 8e 48 c7 44 24 70 90 1d 6f 81 48 8d 4c 24 60 48 c1 e9 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 21 <48> 89 4c 24 58 42 c7 44 21 08 04 f3 f3 f3 48 89 f8 48 c1 e8 03 48 RSP: 0018:ffffc90000a183c0 EFLAGS: 00000a06 RAX: f2f2f200f1f1f1f1 RBX: ffffc90000a18460 RCX: 1ffff92000143084 RDX: ffffffff89951a95 RSI: ffff88803008e040 RDI: ffffc90000a18440 RBP: ffffc90000a184d0 R08: ffffffff901ce1ef R09: 1ffffffff2039c3d R10: dffffc0000000000 R11: fffffbfff2039c3e R12: dffffc0000000000 R13: ffffffff89951a95 R14: ffff88803008e040 R15: ffffffff8e8025c0 trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x9cc/0xa30 kernel/locking/lockdep.c:5833 __raw_write_unlock include/linux/rwlock_api_smp.h:224 [inline] _raw_write_unlock+0x16/0x50 kernel/locking/spinlock.c:342 neigh_del net/core/neighbour.c:223 [inline] neigh_remove_one+0x5c5/0x6e0 net/core/neighbour.c:246 neigh_forced_gc net/core/neighbour.c:279 [inline] neigh_alloc net/core/neighbour.c:485 [inline] ___neigh_create+0x43c/0x2470 net/core/neighbour.c:648 ip6_finish_output2+0x1700/0x1730 net/ipv6/ip6_output.c:132 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4042 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:smp_call_function_many_cond+0x18a4/0x2ca0 kernel/smp.c:879 Code: b2 f6 0b 00 4c 8b 7c 24 20 4d 85 f6 75 11 e8 a3 f6 0b 00 83 7c 24 18 00 75 16 e9 c6 0b 00 00 e8 92 f6 0b 00 fb 83 7c 24 18 00 <0f> 84 b5 0b 00 00 44 3b 7c 24 78 0f 83 aa 0b 00 00 4d 8d 75 08 4c RSP: 0018:ffffc90002ebf580 EFLAGS: 00000202 RAX: ffffffff8188beae RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90017502000 RSI: 0000000000003600 RDI: 0000000000003601 RBP: ffffc90002ebf780 R08: ffffffff8188be80 R09: 1ffffffff284d0f8 R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: dffffc0000000000 R13: ffff8880b873fc80 R14: 0000000000000200 R15: 0000000000000000 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x726/0xb30 arch/x86/kernel/alternative.c:2357 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline] tracepoint_probe_register+0x105/0x160 kernel/tracepoint.c:531 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x478/0x930 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x243/0x2e0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10358 perf_try_init_event+0x146/0x810 kernel/events/core.c:11892 perf_init_event kernel/events/core.c:11978 [inline] perf_event_alloc+0x135f/0x2310 kernel/events/core.c:12260 __do_sys_perf_event_open kernel/events/core.c:12767 [inline] __se_sys_perf_event_open+0xb1f/0x3870 kernel/events/core.c:12658 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f93d4b7dff9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f93d5a33038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f93d4d35f80 RCX: 00007f93d4b7dff9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f93d4bf0296 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f93d4d35f80 R15: 00007ffe721fcac8 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:smp_call_function_many_cond+0x18a4/0x2ca0 kernel/smp.c:879 Code: b2 f6 0b 00 4c 8b 7c 24 20 4d 85 f6 75 11 e8 a3 f6 0b 00 83 7c 24 18 00 75 16 e9 c6 0b 00 00 e8 92 f6 0b 00 fb 83 7c 24 18 00 <0f> 84 b5 0b 00 00 44 3b 7c 24 78 0f 83 aa 0b 00 00 4d 8d 75 08 4c RSP: 0018:ffffc90002ebf580 EFLAGS: 00000202 RAX: ffffffff8188beae RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90017502000 RSI: 0000000000003600 RDI: 0000000000003601 RBP: ffffc90002ebf780 R08: ffffffff8188be80 R09: 1ffffffff284d0f8 R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: dffffc0000000000 R13: ffff8880b873fc80 R14: 0000000000000200 R15: 0000000000000000 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x726/0xb30 arch/x86/kernel/alternative.c:2357 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline] tracepoint_probe_register+0x105/0x160 kernel/tracepoint.c:531 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x478/0x930 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x243/0x2e0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10358 perf_try_init_event+0x146/0x810 kernel/events/core.c:11892 perf_init_event kernel/events/core.c:11978 [inline] perf_event_alloc+0x135f/0x2310 kernel/events/core.c:12260 __do_sys_perf_event_open kernel/events/core.c:12767 [inline] __se_sys_perf_event_open+0xb1f/0x3870 kernel/events/core.c:12658 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f93d4b7dff9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f93d5a33038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f93d4d35f80 RCX: 00007f93d4b7dff9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f93d4bf0296 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f93d4d35f80 R15: 00007ffe721fcac8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.11.0-syzkaller-10574-g93eeaab4563c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:queued_write_lock_slowpath+0x15f/0x44a kernel/locking/qrwlock.c:85 Code: 67 31 30 f6 f0 41 81 0f 00 01 00 00 48 8b 5c 24 08 43 0f b6 04 2e 84 c0 0f 85 94 00 00 00 41 8b 07 3d 00 01 00 00 74 27 f3 90 <43> 0f b6 04 2e 84 c0 74 eb 44 89 f9 80 e1 07 80 c1 03 38 c1 7c de RSP: 0018:ffffc900001173a0 EFLAGS: 00000206 RAX: 00000000000001ff RBX: 1ffff92000022e7e RCX: ffffffff8bce3409 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8fde5c80 RBP: ffffc90000117450 R08: ffffffff8fde5c83 R09: 1ffffffff1fbcb90 R10: dffffc0000000000 R11: fffffbfff1fbcb91 R12: ffffc900001173f0 R13: dffffc0000000000 R14: 1ffffffff1fbcb90 R15: ffffffff8fde5c80 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcc1d43168b CR3: 000000006cd4e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:101 [inline] do_raw_write_lock+0x395/0x4f0 kernel/locking/spinlock_debug.c:211 neigh_forced_gc net/core/neighbour.c:264 [inline] neigh_alloc net/core/neighbour.c:485 [inline] ___neigh_create+0x1f1/0x2470 net/core/neighbour.c:648 ip6_finish_output2+0x1700/0x1730 net/ipv6/ip6_output.c:132 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511 ndisc_send_ns+0xcc/0x160 net/ipv6/ndisc.c:669 addrconf_dad_work+0xb45/0x16f0 net/ipv6/addrconf.c:4284 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244