watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.9.3449:22463] Modules linked in: irq event stamp: 11648073 hardirqs last enabled at (11648072): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (11648073): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (5056644): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (5056644): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (5056644): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (5056647): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (5056647): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (5056647): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 22463 Comm: syz.9.3449 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:cfg80211_inform_single_bss_data+0x96e/0x1b70 net/wireless/scan.c:2347 Code: 01 00 00 4c 89 ef 44 89 f6 e8 be c3 29 f7 48 89 44 24 30 48 85 c0 0f 84 80 01 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 03 00 <74> 08 4c 89 ff e8 58 9d 35 f7 49 8b 1f 48 8b 44 24 30 4c 8d 70 18 RSP: 0018:ffffc90000a082e0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff92000141109 RCX: 0000000000000103 RDX: 0000000000000048 RSI: ffffffff8c27ade0 RDI: ffffffff8c27ada0 RBP: ffffc90000a084d0 R08: 0000000000000920 R09: 00000000ffffffff R10: 0000000000000011 R11: fffff91ffff75005 R12: 0000000000000028 R13: 0000000000000048 R14: 0000000000000920 R15: ffffc90000a08848 FS: 00007f9c1602b6c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 00000000a9fe0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x3c7/0x760 net/wireless/scan.c:3317 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/0x870 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:__preempt_count_sub arch/x86/include/asm/preempt.h:85 [inline] RIP: 0010:preempt_count_sub+0x5c/0x170 kernel/sched/core.c:5801 Code: 05 99 e8 87 11 89 c1 81 e1 ff ff ff 7f 39 cf 7f 2a 81 ff ff 00 00 00 0f 93 c1 84 c0 0f 95 c0 08 c8 74 58 65 8b 05 74 e8 87 11 df 65 01 3d 6b e8 87 11 5b 5d e9 54 71 1c 0a cc 90 e8 bd 00 17 RSP: 0018:ffffc90003f5f468 EFLAGS: 00000202 RAX: 0000000080000002 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff88802dad1e40 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90003f5f598 R08: ffffc90003f5f52f R09: 0000000000000000 R10: ffffc90003f5f520 R11: fffff520007ebea6 R12: ffff888080542c80 R13: dffffc0000000000 R14: ffff88802dad22c0 R15: ffff88802dad1e40 class_preempt_destructor include/linux/preempt.h:468 [inline] __migrate_disable include/linux/sched.h:2454 [inline] migrate_disable include/linux/sched.h:2469 [inline] bpf_prog_run_array include/linux/bpf.h:2466 [inline] trace_call_bpf+0x2e6/0xb70 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11301 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x345/0x440 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5238 [inline] __kvmalloc_node_noprof+0x528/0x8a0 mm/slub.c:6730 kvmemdup_bpfptr_noprof include/linux/bpfptr.h:70 [inline] ___bpf_copy_key kernel/bpf/syscall.c:1700 [inline] map_update_elem+0x44e/0x9d0 kernel/bpf/syscall.c:1799 __sys_bpf+0x6fa/0x950 kernel/bpf/syscall.c:6216 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339 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: 0033:0x7f9c1519c799 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:00007f9c1602b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9c15415fa0 RCX: 00007f9c1519c799 RDX: 0000000000000020 RSI: 00002000000000c0 RDI: 0000000000000002 RBP: 00007f9c15232bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9c15416038 R14: 00007f9c15415fa0 R15: 00007ffeb103b958 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 22489 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+0xce5/0x12c0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 74 e2 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 1f de 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 03 de RSP: 0018:ffffc90003cff720 EFLAGS: 00000293 RAX: ffffffff81b9adcd RBX: 1ffff110170e812d RCX: ffff88802b19dac0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003cff860 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: ffff8880b8740968 R13: dffffc0000000000 R14: ffff8880b863bf80 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555c5a207a38 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:900 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 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