watchdog: BUG: soft lockup - CPU#1 stuck for 142s! [syz.9.8469:25580] Modules linked in: irq event stamp: 13952785 hardirqs last enabled at (13952784): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:199 hardirqs last disabled at (13952785): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (5542752): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (5542752): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (5542752): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (5542755): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (5542755): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (5542755): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 25580 Comm: syz.9.8469 Not tainted 6.16.0-syzkaller-ge8d780dcd957 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x130e/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 RSP: 0018:ffffc90000a07d38 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffffffff8fbab910 RCX: dffffc0000000000 RDX: ffffffff8fbab910 RSI: ffffffff90394908 RDI: ffffffff8be30a20 RBP: ffffffff8fbab910 R08: 0000000000000001 R09: ffffffff8172cd05 R10: ffffc90000a07e58 R11: ffffffff81ac39b0 R12: ffffffff81efb239 R13: ffffffff8fbab910 R14: ffffc90000a07e08 R15: ffffffff8fbab910 FS: 00007f8eef1146c0(0000) GS:ffff888125d7e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32c1bff8 CR3: 0000000032c9a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4376 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] cfg80211_inform_single_bss_data+0x905/0x1ac0 net/wireless/scan.c:2351 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3234 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3325 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5186 [inline] ieee80211_rx_list+0x201c/0x2a90 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7281 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 0b 10 1f f6 e8 36 3e 56 f6 fb bf 01 00 00 00 eb aa ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000d9e7940 EFLAGS: 00000286 RAX: 3d33651f28f98100 RBX: 0000000000000000 RCX: 3d33651f28f98100 RDX: 0000000000000006 RSI: ffffffff8d979717 RDI: 0000000000000001 RBP: ffffc9000d9e79e0 R08: ffffffff8fa08df7 R09: 1ffffffff1f411be R10: dffffc0000000000 R11: fffffbfff1f411bf R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001b3cf28 irqentry_exit+0x6f/0x90 kernel/entry/common.c:196 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:smp_call_function_single+0x470/0x590 kernel/smp.c:-1 Code: cc cc cc cc e8 d1 81 0b 00 90 0f 0b 90 e9 86 fc ff ff e8 c3 81 0b 00 90 0f 0b 90 e9 57 fd ff ff e8 b5 81 0b 00 e8 90 82 7f ff 91 e8 a9 81 0b 00 90 0f 0b 90 e9 13 fd ff ff 89 fa 80 e2 07 fe RSP: 0018:ffffc9000d9e7aa0 EFLAGS: 00000246 RAX: ffffffff81b4345b RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000ffae000 RSI: 0000000000001030 RDI: 0000000000001031 RBP: ffffc9000d9e7b90 R08: ffffffff8fa08df7 R09: 1ffffffff1f411be R10: dffffc0000000000 R11: fffffbfff1f411bf R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff92001b3cf58 R15: 1ffff92001b3cf58 task_function_call kernel/events/core.c:121 [inline] perf_install_in_context+0x593/0x8f0 kernel/events/core.c:3101 __do_sys_perf_event_open kernel/events/core.c:13691 [inline] __se_sys_perf_event_open+0x193a/0x1d70 kernel/events/core.c:13333 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8eee38eb69 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:00007f8eef114038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8eee5b6080 RCX: 00007f8eee38eb69 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0 RBP: 00007f8eee411df1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8eee5b6080 R15: 00007ffd0c00ed88 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 10342 Comm: kworker/u8:12 Not tainted 6.16.0-syzkaller-ge8d780dcd957 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 06 70 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 b1 6b 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 95 6b RSP: 0018:ffffc9000bd17660 EFLAGS: 00000293 RAX: ffffffff81b44a7b RBX: 1ffff110170e7f59 RCX: ffff888027cd0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000bd177e0 R08: ffffffff8fa08df7 R09: 1ffffffff1f411be R10: dffffc0000000000 R11: fffffbfff1f411bf R12: ffff8880b873fac8 R13: dffffc0000000000 R14: ffff8880b863b180 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125c7e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563d67edd028 CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1044 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2901 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245