watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [migration/1:22] Modules linked in: irq event stamp: 5131623 hardirqs last enabled at (5131622): [] class_irqsave_destructor include/linux/irqflags.h:268 [inline] hardirqs last enabled at (5131622): [] perf_swevent_event+0x720/0x810 kernel/events/core.c:10971 hardirqs last disabled at (5131623): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (2091396): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (2091396): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (2091396): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 softirqs last disabled at (2091403): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (2091403): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (2091403): [] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 22 Comm: migration/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Stopper: 0x0 <- 0x0 RIP: 0010:perf_swevent_event+0x760/0x810 kernel/events/core.c:10971 Code: e6 00 02 00 00 75 51 e8 5e a2 c8 ff 4d 89 fe 4d 85 e4 75 07 e8 51 a2 c8 ff eb 06 e8 4a a2 c8 ff fb 48 c7 44 24 40 0e 36 e0 45 <4a> c7 04 33 00 00 00 00 65 48 8b 05 10 b0 6e 11 48 3b 84 24 80 00 RSP: 0018:ffffc90000a07920 EFLAGS: 00000246 RAX: ffffffff81fdcff6 RBX: 1ffff92000140f2c RCX: ffff88801e2f1f00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a079f0 R08: ffffffff905776f7 R09: 1ffffffff20aeede R10: dffffc0000000000 R11: fffffbfff20aeedf R12: 0000000000000200 R13: ffffc90000a07ac8 R14: dffffc0000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125058000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd80c887ff8 CR3: 000000000e946000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_tp_event+0x5ff/0x29d0 kernel/events/core.c:11482 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11401 do_perf_trace_lock_acquire include/trace/events/lock.h:23 [inline] perf_trace_lock_acquire+0x345/0x440 include/trace/events/lock.h:23 __do_trace_lock_acquire include/trace/events/lock.h:23 [inline] trace_lock_acquire include/trace/events/lock.h:23 [inline] lock_acquire+0x2ff/0x350 kernel/locking/lockdep.c:5831 local_trylock_acquire include/linux/local_lock_internal.h:53 [inline] alloc_from_pcs mm/slub.c:4795 [inline] slab_alloc_node mm/slub.c:4933 [inline] __do_kmalloc_node mm/slub.c:5361 [inline] __kmalloc_noprof+0x1c9/0x720 mm/slub.c:5387 _kmalloc_noprof include/linux/slab.h:973 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] ieee802_11_parse_elems_full+0x14b/0x2d60 net/mac80211/parse.c:1073 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2551 [inline] ieee80211_inform_bss+0x163/0x10d0 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd9c/0x1be0 net/wireless/scan.c:2379 cfg80211_inform_bss_data+0x258/0x3c40 net/wireless/scan.c:3238 cfg80211_inform_bss_frame_data+0x3c7/0x730 net/wireless/scan.c:3329 ieee80211_bss_info_update+0x791/0xa50 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5395 [inline] ieee80211_rx_list+0x2b1d/0x3910 net/mac80211/rx.c:5688 ieee80211_rx_napi+0x1ad/0x3d0 net/mac80211/rx.c:5711 ieee80211_rx include/net/mac80211.h:5437 [inline] ieee80211_handle_queued_frames+0xe4/0x1d0 net/mac80211/main.c:452 tasklet_action_common+0x2d7/0x490 kernel/softirq.c:938 handle_softirqs+0x225/0x840 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198 Code: f7 e8 ad 1c d1 f5 f7 c3 00 02 00 00 74 05 e8 10 01 fd f5 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 b4 32 c2 f5 65 8b 05 ad d2 9a 07 85 c0 74 18 5b 41 5e e9 91 48 RSP: 0018:ffffc900001c7d40 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8e22a447 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff905776f7 R09: 1ffffffff20aeede R10: dffffc0000000000 R11: fffffbfff20aeedf R12: dffffc0000000000 R13: ffff88801e2f3770 R14: ffff8880b8728e00 R15: ffff8880b8728e48 cpu_stop_should_run+0xa0/0xd0 kernel/stop_machine.c:483 smpboot_thread_fn+0x4be/0xa80 kernel/smpboot.c:154 kthread+0x388/0x470 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 24670 Comm: kworker/u8:38 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x10b0/0x14b0 kernel/smp.c:892 Code: c0 75 73 41 8b 1e 89 de 83 e6 01 31 ff e8 d8 1e 0c 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 84 1a 0c 00 eb 37 f3 90 <41> 0f b6 04 1c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 69 1a 0c RSP: 0018:ffffc9000691f720 EFLAGS: 00000293 RAX: ffffffff81ba57d7 RBX: dffffc0000000000 RCX: ffff888076933e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000691f860 R08: ffffffff905776f7 R09: 1ffffffff20aeede R10: dffffc0000000000 R11: fffffbfff20aeedf R12: 1ffff110170e81d1 R13: ffff8880b863c448 R14: ffff8880b8740e88 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888124f58000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdaef89f9c CR3: 000000000e946000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline] smp_text_poke_batch_finish+0xb27/0x1110 arch/x86/kernel/alternative.c:3045 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1fe/0x290 mm/kfence/core.c:918 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 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