watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.3.3025:16923] Modules linked in: irq event stamp: 6620335 hardirqs last enabled at (6620334): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (6620335): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (138892): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (138892): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (138892): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (138895): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (138895): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (138895): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 16923 Comm: syz.3.3025 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:217 [inline] RIP: 0010:unwind_next_frame+0x214/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: ef 08 8b 15 de 73 00 0c 8d 42 ff 44 39 f8 0f 86 65 18 00 00 44 89 f8 4c 8d 2c 85 40 3b 93 90 4c 89 e8 48 c1 e8 03 0f b6 04 28 <84> c0 48 89 eb 0f 85 1c 1c 00 00 45 8b 6d 00 44 89 f8 ff c0 48 8d RSP: 0018:ffffc90000a07b58 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ebcddef09edbcc00 RDX: 00000000000a3891 RSI: ffffffff8b9eea40 RDI: ffffffff8b9eea00 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81725d45 R10: dffffc0000000000 R11: ffffffff81aaf950 R12: ffffffff8b3475b9 R13: ffffffff90bc0d14 R14: ffffc90000a07c28 R15: 00000000000a3475 FS: 00007f12f4f996c0(0000) GS:ffff88812648a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f833120ff98 CR3: 0000000061b2c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 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+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 kvfree_call_rcu+0x130/0x4c0 mm/slab_common.c:1995 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2381 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+0x20d5/0x2b40 net/mac80211/rx.c:5447 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5470 ieee80211_rx include/net/mac80211.h:5214 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x369/0x580 kernel/softirq.c:925 handle_softirqs+0x283/0x870 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:702 RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline] RIP: 0010:class_preempt_notrace_constructor include/linux/preempt.h:471 [inline] RIP: 0010:__do_trace_lock_release include/trace/events/lock.h:69 [inline] RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline] RIP: 0010:lock_release+0x390/0x3e0 kernel/locking/lockdep.c:5879 Code: 1e fa 4d 89 f7 4c 89 eb 65 8b 05 bf 2b ad 10 83 f8 08 73 55 89 c0 48 0f a3 05 ac b8 bf 0d 49 89 dd 4d 89 fe 0f 83 9a fc ff ff <65> ff 05 99 2b ad 10 48 8b 05 9a 0a aa 0d 48 85 c0 74 0f 48 8b 78 RSP: 0018:ffffc9000b6d7318 EFLAGS: 00000297 RAX: 0000000000000001 RBX: ffffffff81c9e487 RCX: 0000000000080000 RDX: ffffc9001b0cb000 RSI: ffffffff81c9e487 RDI: ffffffff8dd3b160 RBP: ffffc9000b6d7498 R08: ffffc9000b6d742f R09: 0000000000000000 R10: ffffc9000b6d7420 R11: ffffffffa0201754 R12: 0000000000000000 R13: ffffffff81c9e487 R14: ffffffff8dd3b160 R15: ffffffff8dd3b160 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] trace_call_bpf+0x79e/0xb50 kernel/trace/bpf_trace.c:147 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10931 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 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+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] pte_unmap include/linux/pgtable.h:136 [inline] __text_poke+0x83e/0xa10 arch/x86/kernel/alternative.c:2528 text_poke arch/x86/kernel/alternative.c:2552 [inline] smp_text_poke_batch_finish+0x394/0x1130 arch/x86/kernel/alternative.c:2860 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 tracepoint_add_func+0x994/0xa10 kernel/tracepoint.c:315 tracepoint_probe_register_prio kernel/tracepoint.c:464 [inline] tracepoint_probe_register+0x5d/0x90 kernel/tracepoint.c:484 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x4e1/0x9d0 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x23d/0x2d0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10872 perf_try_init_event+0x17c/0x870 kernel/events/core.c:12605 perf_init_event kernel/events/core.c:12703 [inline] perf_event_alloc+0x133e/0x2be0 kernel/events/core.c:12978 __do_sys_perf_event_open kernel/events/core.c:13496 [inline] __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13377 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f12f418eec9 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:00007f12f4f99038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f12f43e6090 RCX: 00007f12f418eec9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007f12f4211f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f12f43e6128 R14: 00007f12f43e6090 R15: 00007ffdb141f578 Sending NMI from CPU 1 to CPUs 0: rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x90 kernel/kcov.c:313 Code: 7c 11 10 48 89 74 11 18 48 89 44 11 20 e9 98 2c 79 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 60 49 92 65 8b 0d 78 dc RSP: 0018:ffffc90000007058 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8c74a580 RDX: 0000000000010100 RSI: 00000000ffff0a00 RDI: 0000000000010000 RBP: ffffffff8b4b81e4 R08: ffff88801c6d3c80 R09: 0000000000000008 R10: 0000000000000007 R11: 0000000000010100 R12: ffffc90000007280 R13: 00000006ffff0a00 R14: ffffc9000000738f R15: 0000000000000018 FS: 0000000000000000(0000) GS:ffff88812638a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe82534fa8 CR3: 0000000063f90000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: string_nocheck lib/vsprintf.c:652 [inline] string+0xbc/0x2b0 lib/vsprintf.c:735 vsnprintf+0x739/0xf00 lib/vsprintf.c:2926 sprintf+0xd9/0x120 lib/vsprintf.c:3089 print_caller kernel/printk/printk.c:1365 [inline] info_print_prefix+0x1f3/0x310 kernel/printk/printk.c:1382 record_print_text+0x154/0x420 kernel/printk/printk.c:1429 printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:2997 console_emit_next_record kernel/printk/printk.c:3065 [inline] console_flush_all+0x4ca/0xb10 kernel/printk/printk.c:3199 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3298 vprintk_emit+0x4c5/0x590 kernel/printk/printk.c:2423 _printk+0xcf/0x120 kernel/printk/printk.c:2448 print_other_cpu_stall+0x189/0x1340 kernel/rcu/tree_stall.h:656 check_cpu_stall kernel/rcu/tree_stall.h:857 [inline] rcu_pending kernel/rcu/tree.c:3671 [inline] rcu_sched_clock_irq+0xa47/0x11b0 kernel/rcu/tree.c:2706 update_process_times+0x23c/0x2f0 kernel/time/timer.c:2473 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x39a/0x520 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:tasklet_action_common+0x160/0x580 arch/x86/include/asm/irqflags.h:-1 Code: 89 ef e8 23 f1 ff ff 48 c7 c7 40 a4 49 8b e8 87 39 b1 09 8b 44 24 14 65 66 09 05 a3 b1 c5 10 e8 d6 87 42 00 fb 48 8b 44 24 38 <49> 89 c7 48 85 c0 0f 84 c2 03 00 00 49 89 de 4c 89 fb 48 c1 eb 03 RSP: 0018:ffffc90000147a60 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffff8880b8823d08 RCX: 196b99a2cb72e000 RDX: 0000000000000000 RSI: ffffffff8d512c0f RDI: ffffffff8b9eea60 RBP: ffffc90000147b50 R08: ffffffff8f5bed37 R09: 1ffffffff1eb7da6 R10: dffffc0000000000 R11: fffffbfff1eb7da7 R12: dffffc0000000000 R13: 0000000000000006 R14: ffff8880b8823d08 R15: ffff88806bef1650 handle_softirqs+0x283/0x870 kernel/softirq.c:622 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1063 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245