watchdog: BUG: soft lockup - CPU#0 stuck for 169s! [kworker/u8:1:13] Modules linked in: irq event stamp: 506723 hardirqs last enabled at (506722): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline] hardirqs last enabled at (506722): [] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221 hardirqs last disabled at (506723): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (501966): [] ieee80211_rx_bss_info net/mac80211/ibss.c:1137 [inline] softirqs last enabled at (501966): [] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] softirqs last enabled at (501966): [] ieee80211_ibss_rx_queued_mgmt+0x1e95/0x2c40 net/mac80211/ibss.c:1573 softirqs last disabled at (501971): [] __do_softirq kernel/softirq.c:703 [inline] softirqs last disabled at (501971): [] invoke_softirq kernel/softirq.c:542 [inline] softirqs last disabled at (501971): [] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947 Code: ff ff ff e8 30 bc 5f 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 32 a6 3c 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 4f cf 62 0a cc 48 8d 3d b7 e5 1c RSP: 0018:ffffc90000007160 EFLAGS: 00000296 RAX: 4098b249d4357100 RBX: 0000000000000000 RCX: 0000000000000101 RDX: 0000000027e6de89 RSI: ffffffff8e933539 RDI: ffffffff8c8eae80 RBP: ffff88801eec5dc0 R08: ffffffff81d56934 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff91ffff96605 R12: ffffffff9015a320 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246 FS: 0000000000000000(0000) GS:ffff888123413000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc816eb212d CR3: 00000000272e4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] trace_call_bpf+0xd5/0xb80 kernel/trace/bpf_trace.c:-1 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11524 do_perf_trace_lock include/trace/events/lock.h:49 [inline] perf_trace_lock+0x32e/0x410 include/trace/events/lock.h:49 __do_trace_lock_release include/trace/events/lock.h:68 [inline] trace_lock_release include/trace/events/lock.h:68 [inline] lock_release+0x396/0x3c0 kernel/locking/lockdep.c:5954 rcu_lock_release include/linux/rcupdate.h:319 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] class_rcu_destructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709 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 unpoison_slab_object mm/kasan/common.c:351 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:377 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4720 [inline] slab_alloc_node mm/slub.c:5033 [inline] kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5047 dst_alloc+0x105/0x170 net/core/dst.c:90 ip6_dst_alloc net/ipv6/route.c:351 [inline] icmp6_dst_alloc+0x72/0x430 net/ipv6/route.c:3324 ndisc_send_skb+0x42f/0x1650 net/ipv6/ndisc.c:492 addrconf_rs_timer+0x2d2/0x6c0 net/ipv6/addrconf.c:4098 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1749 expire_timers kernel/time/timer.c:1800 [inline] __run_timers kernel/time/timer.c:2375 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2387 run_timer_base kernel/time/timer.c:2396 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2406 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 __do_softirq kernel/softirq.c:703 [inline] invoke_softirq kernel/softirq.c:542 [inline] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 irq_exit_rcu+0x9/0x30 kernel/softirq.c:809 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947 Code: ff ff ff e8 30 bc 5f 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 32 a6 3c 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 4f cf 62 0a cc 48 8d 3d b7 e5 1c RSP: 0018:ffffc90000127200 EFLAGS: 00000296 RAX: 4098b249d4357100 RBX: 0000000000000000 RCX: 0000000000000046 RDX: 00000000f2ba67b3 RSI: ffffffff8e933539 RDI: ffffffff8c8eae80 RBP: ffff88801eec5dc0 R08: ffffffff817879cf R09: 0000000000000000 R10: ffffc90000127000 R11: ffffffff81b3b570 R12: ffffffff9015a320 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] class_rcu_constructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0xac/0x2550 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 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2780 [inline] slab_free mm/slub.c:6630 [inline] kfree+0x1c5/0x650 mm/slub.c:6923 ieee80211_ibss_rx_queued_mgmt+0x1e9f/0x2c40 net/mac80211/ibss.c:-1 ieee80211_iface_process_skb net/mac80211/iface.c:1805 [inline] ieee80211_iface_work+0x769/0xfa0 net/mac80211/iface.c:1859 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:610 process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 63 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:389 [inline] RIP: 0010:csd_lock kernel/smp.c:422 [inline] RIP: 0010:smp_call_function_many_cond+0x61e/0x1500 kernel/smp.c:970 Code: b6 04 04 84 c0 0f 85 d5 03 00 00 44 8b 3b 44 89 fe 83 e6 01 31 ff e8 51 7a 0c 00 41 83 e7 01 75 07 e8 36 75 0c 00 eb 3f f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 75 0f f7 03 01 RSP: 0018:ffffc9000204f720 EFLAGS: 00000293 RAX: ffffffff81bcadde RBX: ffff8880b8244028 RCX: ffff88801e7addc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000204f870 R08: ffff88801e7af35f R09: 1ffff11003cf5e6b R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff11017048805 R13: 0000000000000000 R14: ffff8880b8244020 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888123513000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055bb60388a38 CR3: 000000000ff48000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2642 [inline] smp_text_poke_batch_finish+0x5f8/0x1110 arch/x86/kernel/alternative.c:2852 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:902 process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245