watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.0.31:5946] Modules linked in: irq event stamp: 14830347 hardirqs last enabled at (14830346): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (14830346): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (14830346): [] irqentry_exit+0x218/0x910 kernel/entry/common.c:167 hardirqs last disabled at (14830347): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (7097270): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last enabled at (7097270): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last enabled at (7097270): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 softirqs last disabled at (7097273): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last disabled at (7097273): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last disabled at (7097273): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 CPU: 0 UID: 0 PID: 5946 Comm: syz.0.31 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:kasan_check_range+0x1ca/0x2c0 mm/kasan/generic.c:200 Code: dc 4d 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 0e 41 80 3b 00 75 7c 49 ff c3 49 ff cc 75 f2 5b 41 5c <41> 5d 41 5e 41 5f 5d e9 1a fa af 09 cc 45 84 ff 0f 85 a1 00 00 00 RSP: 0018:ffffc90000007a18 EFLAGS: 00000297 RAX: 00000000ffffff01 RBX: ffff888063d00150 RCX: ffffffff81a3ca6b RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007a80 RBP: ffffc90000007af8 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000f50 R12: 1ffff92000000f4c R13: ffff888063d00158 R14: fffff52000000f51 R15: 1ffff92000000f50 FS: 00007f3a382906c0(0000) GS:ffff888124cd6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f29f575da08 CR3: 00000000560b2000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instrument_read_write include/linux/instrumented.h:55 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline] queued_spin_lock include/asm-generic/qspinlock.h:112 [inline] do_raw_spin_lock+0x12b/0x2f0 kernel/locking/spinlock_debug.c:116 spin_lock_bh include/linux/spinlock.h:353 [inline] cfg80211_put_bss+0x40/0x230 net/wireless/scan.c:3385 __ieee80211_rx_handle_packet net/mac80211/rx.c:5427 [inline] ieee80211_rx_list+0x2d0e/0x3b00 net/mac80211/rx.c:5720 ieee80211_rx_napi+0x1ad/0x3d0 net/mac80211/rx.c:5743 ieee80211_rx include/net/mac80211.h:5449 [inline] ieee80211_handle_queued_frames+0xe4/0x1d0 net/mac80211/main.c:452 tasklet_action_common+0x2d7/0x490 kernel/softirq.c:961 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__schedule+0x14e/0x58f0 kernel/sched/core.c:-1 Code: d8 5a 96 93 48 89 d8 48 c1 e8 03 48 89 44 24 50 42 80 3c 28 00 74 08 48 89 df e8 3d 47 52 f6 48 89 9c 24 88 00 00 00 48 8b 03 <48> 89 44 24 08 48 8d 58 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 RSP: 0018:ffffc9000574f400 EFLAGS: 00000246 RAX: ffff88802e240000 RBX: ffff8880b863bad8 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8c6d9460 RDI: ffffffff8c6d9420 RBP: ffffc9000574f5f8 R08: ffffffff907a1e7f R09: 1ffffffff20f43cf R10: dffffc0000000000 R11: fffffbfff20f43d0 R12: 0000000000000001 R13: dffffc0000000000 R14: 1ffff92000ae9ea4 R15: ffff888124cd6000 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7455 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12 smp_call_function_many_cond+0x121e/0x1500 kernel/smp.c:995 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2602 [inline] smp_text_poke_batch_finish+0x5fd/0x1110 arch/x86/kernel/alternative.c:2812 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x8f1/0xa90 kernel/tracepoint.c:326 tracepoint_probe_register_prio kernel/tracepoint.c:475 [inline] tracepoint_probe_register+0x5d/0x90 kernel/tracepoint.c:495 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x4b3/0x880 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x23d/0x2d0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:11371 perf_try_init_event+0x172/0x830 kernel/events/core.c:13139 perf_init_event kernel/events/core.c:13237 [inline] perf_event_alloc+0x1452/0x2e30 kernel/events/core.c:13512 __do_sys_perf_event_open kernel/events/core.c:14035 [inline] __se_sys_perf_event_open+0x831/0x1eb0 kernel/events/core.c:13914 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3a3739e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3a38290028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f3a37626090 RCX: 00007f3a3739e159 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000200000000340 RBP: 00007f3a37435024 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3a37626128 R14: 00007f3a37626090 R15: 00007ffdf0e90538 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6008 Comm: kworker/u8:19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:222 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:233 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:650 [inline] RIP: 0010:cpu_online include/linux/cpumask.h:1232 [inline] RIP: 0010:trace_irq_disable+0x2c/0x140 include/trace/events/preemptirq.h:36 Code: 41 56 41 54 53 66 90 65 8b 05 c8 8e c4 11 83 f8 08 73 37 89 c3 c1 e8 06 48 8d 3c c5 78 1e 7a 90 be 08 00 00 00 e8 44 b6 67 00 <48> 0f a3 1d e4 0c aa 0e 73 09 e8 35 47 dc ff 84 c0 74 13 5b 41 5c RSP: 0018:ffffc90000a18d80 EFLAGS: 00000056 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81d0118c RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff907a1e78 RBP: 18d33839034f41a0 R08: ffffffff907a1e7f R09: 1ffffffff20f43cf R10: dffffc0000000000 R11: fffffbfff20f43d0 R12: ffff88807cba2318 R13: ffff888026242830 R14: dffffc0000000000 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff888124dd6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc432d11e9c CR3: 000000000eb48000 CR4: 00000000003526f0 Call Trace: seqcount_lockdep_reader_access+0x70/0x100 include/linux/seqlock.h:72 ktime_get+0x45/0x220 kernel/time/timekeeping.c:1002 gate_get_time net/sched/act_gate.c:23 [inline] gate_timer_func+0x1dc/0x450 net/sched/act_gate.c:101 __run_hrtimer kernel/time/hrtimer.c:2067 [inline] __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2124 hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2141 handle_softirqs+0x226/0x860 kernel/softirq.c:645 do_softirq+0x77/0xd0 kernel/softirq.c:546 __local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473 spin_unlock_bh include/linux/spinlock.h:407 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:816 [inline] nsim_dev_trap_report_work+0x7a4/0xb40 drivers/net/netdevsim/dev.c:847 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245