watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.1.3700:20328] Modules linked in: irq event stamp: 13407595 hardirqs last enabled at (13407594): [] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219 hardirqs last disabled at (13407595): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (89468): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (89468): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (89468): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 softirqs last disabled at (89471): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (89471): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (89471): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 20328 Comm: syz.1.3700 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:unwind_next_frame+0x18/0x23d0 arch/x86/kernel/unwind_orc.c:485 Code: 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 89 fe <48> bd 00 00 00 00 00 fc ff df 48 8d 5f 48 48 89 d8 48 c1 e8 03 48 RSP: 0018:ffffc90000a07cb8 EFLAGS: 00000296 RAX: 0000000000000001 RBX: ffffc90000a07e40 RCX: 0000000000000300 RDX: dffffc0000000000 RSI: ffffffff8207ac26 RDI: ffffc90000a07d88 RBP: ffffc90000a07e10 R08: ffffc90000a07e50 R09: 0000000000000002 R10: ffffc90000a07dd8 R11: ffffffff81acf3d0 R12: ffff88802805bd00 R13: ffff888077970a80 R14: ffffc90000a07d88 R15: ffffc90000a07d88 FS: 00007fe26a39a6c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe26a357f98 CR3: 000000005c42c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000000595062a 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+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 kvfree_call_rcu+0x106/0x440 mm/slab_common.c:1994 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2110 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xbc8/0x1ad0 net/wireless/scan.c:2369 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2485/0x2f90 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194 Code: f7 e8 cd 5a 42 f6 f7 c3 00 02 00 00 74 05 e8 20 87 6c f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 04 75 34 f6 65 8b 05 0d d8 23 07 85 c0 74 18 5b 41 5e c3 cc cc RSP: 0018:ffffc90004af7a60 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000292 RCX: 0000000080000001 RDX: 0000000000000007 RSI: ffffffff8d792148 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: ffff8880411e3000 R13: ffff8880411e2000 R14: ffffffff99b13720 R15: 0000000000000001 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline] debug_check_no_obj_freed+0x52e/0x550 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2471 [inline] slab_free mm/slub.c:6670 [inline] kfree+0x13b/0x660 mm/slub.c:6878 tomoyo_realpath_from_path+0x598/0x5d0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x1e8/0x5a0 security/tomoyo/file.c:723 security_file_ioctl+0xcb/0x2d0 security/security.c:2435 __do_sys_ioctl fs/ioctl.c:591 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe26958f749 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:00007fe26a39a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe2697e5fa0 RCX: 00007fe26958f749 RDX: ffffffffffffffff RSI: 0000000040042408 RDI: 000000000000000d RBP: 00007fe269613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe2697e6038 R14: 00007fe2697e5fa0 R15: 00007ffdb9baa848 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3835 Comm: kworker/u8:11 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+0xcc5/0x1260 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 e4 97 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 8f 93 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 73 93 RSP: 0018:ffffc9000ce876a0 EFLAGS: 00000293 RAX: ffffffff81b5644d RBX: 1ffff110170e8129 RCX: ffff8880326e3d00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000ce877e0 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: ffff8880b8740948 R13: dffffc0000000000 R14: ffff8880b863bb00 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea38bb7198 CR3: 000000000dd3a000 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:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2921 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+0x1a1/0x240 mm/kfence/core.c:879 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246