watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.2.629:8212] Modules linked in: irq event stamp: 11824891 hardirqs last enabled at (11824890): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (11824891): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (854722): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (854722): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (854722): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (854725): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (854725): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (854725): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 8212 Comm: syz.2.629 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 5b 1b f3 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a07ab8 EFLAGS: 00000206 RAX: 35409db2c8765300 RBX: 0000000000000000 RCX: 35409db2c8765300 RDX: 0000000000000000 RSI: ffffffff8d9ccc43 RDI: ffffffff8bc06160 RBP: ffffffff8172ad45 R08: 0000000000000000 R09: ffffffff8172ad45 R10: dffffc0000000000 R11: fffff91ffffba405 R12: 0000000000000002 R13: ffffffff8e13b260 R14: 0000000000000000 R15: 0000000000000246 FS: 00007fef1677a6c0(0000) GS:ffff888125e27000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef13bf5f98 CR3: 0000000079fea000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1169 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 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:should_resched arch/x86/include/asm/preempt.h:104 [inline] RIP: 0010:class_preempt_destructor include/linux/preempt.h:470 [inline] RIP: 0010:__migrate_enable include/linux/sched.h:2377 [inline] RIP: 0010:migrate_enable include/linux/sched.h:2417 [inline] RIP: 0010:bpf_prog_run_array include/linux/bpf.h:2322 [inline] RIP: 0010:trace_call_bpf+0x662/0xb50 kernel/trace/bpf_trace.c:145 Code: 3e 91 92 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 82 04 00 00 ff 0b bf 01 00 00 00 e8 b5 84 c4 ff 65 8b 1d 1e 01 c5 10 <31> ff 89 de e8 75 99 f4 ff 85 db 0f 84 3d 02 00 00 e8 28 95 f4 ff RSP: 0018:ffffc9000b6a70a0 EFLAGS: 00000293 RAX: 0000000080000002 RBX: 0000000080000001 RCX: 0000000000000000 RDX: ffffc9000c41a000 RSI: 0000000000006705 RDI: 00000000ffffffff RBP: ffffc9000b6a71b8 R08: ffffc9000b6a714f R09: 0000000000000000 R10: ffffc9000b6a7140 R11: ffffffffa0203710 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880796cdf40 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10931 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 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+0x311/0x360 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] ___pte_offset_map+0x45/0x250 mm/pgtable-generic.c:286 __pte_offset_map include/linux/mm.h:3113 [inline] __pte_offset_map_lock+0x46/0x210 mm/pgtable-generic.c:397 get_locked_pte include/linux/mm.h:2810 [inline] __text_poke+0x2e6/0xa10 arch/x86/kernel/alternative.c:2467 text_poke arch/x86/kernel/alternative.c:2552 [inline] smp_text_poke_batch_finish+0x394/0x1130 arch/x86/kernel/alternative.c:2860 __static_call_transform+0x4eb/0x750 arch/x86/kernel/static_call.c:111 arch_static_call_transform+0x98/0xc0 arch/x86/kernel/static_call.c:-1 __static_call_update+0x3c3/0x5d0 kernel/static_call_inline.c:209 tracepoint_update_call kernel/tracepoint.c:271 [inline] tracepoint_add_func+0x91e/0xa10 kernel/tracepoint.c:312 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+0x17f/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/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fef1598eec9 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:00007fef1677a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fef15be5fa0 RCX: 00007fef1598eec9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000500 RBP: 00007fef15a11f91 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fef15be6038 R14: 00007fef15be5fa0 R15: 00007ffe3659cf68 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5813 Comm: sshd-session Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 96 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 41 6f 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 25 6f RSP: 0000:ffffc90003e4f700 EFLAGS: 00000293 RAX: ffffffff81b3b52b RBX: 1ffff110170e7ffd RCX: ffff88803006bc80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003e4f880 R08: ffffffff8f9db337 R09: 1ffffffff1f3b666 R10: dffffc0000000000 R11: fffffbfff1f3b667 R12: ffff8880b873ffe8 R13: dffffc0000000000 R14: ffff8880b863b240 R15: 0000000000000001 FS: 00007fd68919b300(0000) GS:ffff888125d27000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd688bf9128 CR3: 0000000074d1c000 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 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x6b1/0x12d0 arch/x86/mm/tlb.c:1451 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline] ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:101 wp_page_copy mm/memory.c:3745 [inline] do_wp_page+0x1bc2/0x5800 mm/memory.c:4140 handle_pte_fault mm/memory.c:6193 [inline] __handle_mm_fault+0x1033/0x5400 mm/memory.c:6318 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fd688b1f993 Code: c9 85 c0 0f 9f c1 01 c9 e9 aa f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 41 54 31 c0 41 89 d4 ba 01 00 00 00 55 89 f5 53 48 89 fb 0f b1 15 8d 97 0d 00 75 23 44 89 e2 89 ee 48 89 df e8 26 f6 ff RSP: 002b:00007ffeeca6a760 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000055f667420910 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: 000055f667420910 RBP: 0000000000000001 R08: 0000000000000190 R09: 0000000000000001 R10: 0000000000000000 R11: 00007ffeeca6b0b9 R12: 0000000000000020 R13: 00007fd68919b1a0 R14: 0000000000000000 R15: 000055f667420910