watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.3.288:7329] Modules linked in: irq event stamp: 10965801 hardirqs last enabled at (10965800): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (10965801): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (6558670): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (6558670): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (6558670): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (6558675): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (6558675): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (6558675): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 7329 Comm: syz.3.288 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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:ffffc90000006bb8 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: ffffffff8ffee228 RCX: dffffc0000000000 RDX: ffffffff8ffee1f4 RSI: ffffffff90b08e7e RDI: ffffffff8bbf0e00 RBP: ffffffff8ffee210 R08: 000000000000000e R09: ffffffff81738c45 R10: ffffc90000006920 R11: ffffffffa0201694 R12: ffffffff8b46d8e5 R13: ffffffff8ffee20c R14: ffffc90000006c88 R15: ffffffff8ffee21c FS: 00007f922821c6c0(0000) GS:ffff888126138000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c389f8a CR3: 00000000314d4000 CR4: 00000000003526f0 DR0: 0000200000000300 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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2543 [inline] slab_free mm/slub.c:6642 [inline] kfree+0x19a/0x6d0 mm/slub.c:6849 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2385 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline] ieee80211_rx_list+0x2192/0x2c10 net/mac80211/rx.c:5451 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5474 ieee80211_rx include/net/mac80211.h:5214 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x36c/0x580 kernel/softirq.c:925 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__schedule+0x7f/0x4cc0 kernel/sched/core.c:6785 Code: ea 4e 7c 8d 48 c7 84 24 10 01 00 00 30 b7 47 8b 48 8d 8c 24 00 01 00 00 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f2 00 00 4a 89 04 31 <48> b8 f2 f2 f2 f2 f2 00 f2 f2 4a 89 44 31 09 42 c7 44 31 11 f2 00 RSP: 0018:ffffc9000426f7c0 EFLAGS: 00000a06 RAX: 0000f204f1f1f1f1 RBX: ffff88807dfb8000 RCX: 1ffff9200084df18 RDX: 0000000000000000 RSI: ffffffff8d70f0e7 RDI: ffffc9000426f950 RBP: ffffc9000426f9d0 R08: ffffffff8f7cee77 R09: 1ffffffff1ef9dce R10: dffffc0000000000 R11: fffffbfff1ef9dcf R12: 0000000000000000 R13: 0000000000000001 R14: dffffc0000000000 R15: 1ffff9200084df3c preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__futex_hash+0x2cf/0x760 include/linux/find.h:-1 Code: fe e8 b5 dd 0c 00 4d 39 fc 41 0f 93 c5 31 ff 89 de e8 85 df 0c 00 85 db 0f 95 c0 44 84 e8 75 2b e8 36 db 0c 00 4c 89 e3 eb 4d <48> 89 2c 24 4d 85 f6 0f 84 a1 00 00 00 e8 1f db 0c 00 48 bd 00 00 RSP: 0018:ffffc9000426fb50 EFLAGS: 00000246 RAX: ffffffff81b32960 RBX: 00000000ffffffff RCX: 0000000000000002 RDX: ffff88807dfb8000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000426fc50 R08: 0000000000000000 R09: ffffffff81b32640 R10: ffffc9000426f900 R11: ffffffffa0201694 R12: 1ffff9200084df8a R13: 0000000000000000 R14: 0000000000000000 R15: ffffc9000426fc40 futex_hash+0xe5/0x2d0 kernel/futex/core.c:309 class_hb_constructor kernel/futex/futex.h:240 [inline] futex_wake+0x161/0x560 kernel/futex/waitwake.c:172 do_futex+0x395/0x420 kernel/futex/syscalls.c:135 __do_sys_futex kernel/futex/syscalls.c:207 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f922738f749 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:00007f922821c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f92275e6098 RCX: 00007f922738f749 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f92275e609c RBP: 00007f92275e6090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f92275e6128 R14: 00007ffead1abbb0 R15: 00007ffead1abc98 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1150 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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 b6 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 6f 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 45 6f RSP: 0018:ffffc9000410f640 EFLAGS: 00000293 RAX: ffffffff81b4979b RBX: 1ffff11017108431 RCX: ffff888026825ac0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000410f7c0 R08: ffffffff8f7cee77 R09: 1ffffffff1ef9dce R10: dffffc0000000000 R11: fffffbfff1ef9dcf R12: ffff8880b8842188 R13: dffffc0000000000 R14: ffff8880b893b1c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888126238000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3da1115000 CR3: 000000000dd38000 CR4: 00000000003526f0 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2713 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2923 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:852 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245