watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.1.1770:12477] Modules linked in: irq event stamp: 11252379 hardirqs last enabled at (11252378): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (11252379): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (6392180): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (6392180): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (6392180): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (6392183): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (6392183): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (6392183): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 12477 Comm: syz.1.1770 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:check_preemption_disabled+0x3/0xe0 lib/smp_processor_id.c:13 Code: 27 8c 48 c7 c6 60 88 27 8c eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 <41> 56 53 65 8b 05 57 c3 77 07 65 8b 0d 4c c3 77 07 f7 c1 ff ff ff RSP: 0018:ffffc90000006708 EFLAGS: 00000246 RAX: 0000607eda572360 RBX: ffffffff8e62c4c0 RCX: 000000008bce0005 RDX: ffffffff81d06797 RSI: ffffffff8c278860 RDI: ffffffff8c278820 RBP: ffffc90000006818 R08: ffffffff81d05c52 R09: ffffffff8e7603e0 R10: dffffc0000000000 R11: fffff91ffff48a05 R12: dffffc0000000000 R13: 000000000000000d R14: ffffffff8e62c460 R15: 1ffff92000000cec FS: 00007fb5a27f86c0(0000) GS:ffff888125496000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb5a27b6d58 CR3: 000000005607a000 CR4: 00000000003526f0 DR0: 00000000000000d4 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0xf8/0x3f0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x379/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock+0x93/0xa0 include/linux/rcupdate.h:881 trace_call_bpf+0xa12/0xb70 kernel/trace/bpf_trace.c:124 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11301 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x326/0x3f0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x379/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 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 __call_rcu_common kernel/rcu/tree.c:3131 [inline] call_rcu+0xee/0x890 kernel/rcu/tree.c:3251 __kfree_rcu_sheaf+0x276/0x5d0 mm/slub.c:5866 kfree_rcu_sheaf mm/slab_common.c:1608 [inline] kvfree_call_rcu+0x9e/0x430 mm/slab_common.c:1957 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+0xbc4/0x1ab0 net/wireless/scan.c:2369 cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5305 [inline] ieee80211_rx_list+0x29e5/0x3710 net/mac80211/rx.c:5588 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/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:lock_is_held_type+0x106/0x150 kernel/locking/lockdep.c:5945 Code: 18 00 00 b8 ff ff ff ff 65 0f c1 05 04 20 78 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 8b e1 02 00 cc 90 0f 0b 90 48 c7 RSP: 0018:ffffc900051df408 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080000001 RDX: ffff88805a928000 RSI: ffffffff8e15b390 RDI: ffffffff8c278880 RBP: 00000000ffffffff R08: ffffffff81d05c52 R09: ffffffff8e7603e0 R10: dffffc0000000000 R11: fffff91ffff48605 R12: 0000000000000246 R13: ffff88805a928000 R14: ffffffff8e7603e0 R15: 0000000000000001 trace_call_bpf+0x1a6/0xb70 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11301 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x326/0x3f0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x379/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 save_stack+0x122/0x230 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1432 [inline] __free_frozen_pages+0xc00/0xd90 mm/page_alloc.c:2977 __slab_free+0x263/0x2b0 mm/slub.c:5490 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4459 [inline] slab_alloc_node mm/slub.c:4788 [inline] kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4807 __d_alloc+0x37/0x6f0 fs/dcache.c:1740 d_alloc_pseudo+0x21/0xc0 fs/dcache.c:1871 alloc_path_pseudo fs/file_table.c:364 [inline] alloc_file_pseudo+0xdd/0x240 fs/file_table.c:380 sock_alloc_file+0xb8/0x2e0 net/socket.c:483 sock_map_fd net/socket.c:513 [inline] __sys_socket+0x13c/0x1b0 net/socket.c:1756 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb5a199bf79 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:00007fb5a27f8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fb5a1c15fa0 RCX: 00007fb5a199bf79 RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007fb5a1a327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb5a1c16038 R14: 00007fb5a1c15fa0 R15: 00007ffd367fa308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 8977 Comm: kworker/u8:20 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xce5/0x1270 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 24 da 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cf d5 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 b3 d5 RSP: 0018:ffffc9000be1f720 EFLAGS: 00000293 RAX: ffffffff81b8dd6d RBX: 1ffff110170c84d5 RCX: ffff88805a671e40 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000be1f860 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: ffff8880b86426a8 R13: dffffc0000000000 R14: ffff8880b873bd80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125596000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb547d45000 CR3: 000000000e54c000 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:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2746 [inline] smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2956 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 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:899 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245