watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.7.3746:20620] Modules linked in: irq event stamp: 6218193 hardirqs last enabled at (6218192): [] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219 hardirqs last disabled at (6218193): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (41572): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (41572): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (41572): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 softirqs last disabled at (41575): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (41575): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (41575): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 20620 Comm: syz.7.3746 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:perf_swevent_get_recursion_context+0x4/0x100 kernel/events/core.c:10685 Code: 38 c1 7c 83 48 89 df e8 4a 1f 35 00 e9 76 ff ff ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 41 57 41 56 41 54 53 49 bf 00 00 00 00 00 fc ff df e8 e5 a5 ce RSP: 0018:ffffc90000006c58 EFLAGS: 00000287 RAX: ffffffff81cab6f8 RBX: 000000000000002c RCX: 0000000000000100 RDX: ffff888033eebd00 RSI: 000000000000002c RDI: 0000000000002000 RBP: ffffc90000006d98 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000006f78 R11: ffffffff81acf4b0 R12: 1ffff92000000d9c R13: dffffc0000000000 R14: ffffc90000006d00 R15: ffffc90000006d20 FS: 00007f9a226626c0(0000) GS:ffff888125e1e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3682bd CR3: 000000006a704000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_buf_alloc+0x43/0x280 kernel/trace/trace_event_perf.c:410 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x196/0x410 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+0x2ef/0x340 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 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:5657 [inline] __kmalloc_noprof+0x41d/0x800 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] cfg80211_inform_single_bss_data+0x91e/0x1ad0 net/wireless/scan.c:2345 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2485/0x2f90 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 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_release+0x330/0x3b0 kernel/locking/lockdep.c:-1 Code: 48 8d 3d 83 50 e7 0d 67 48 0f b9 3a e9 19 fe ff ff e8 64 fd bb 09 48 c7 c7 90 1c e1 8d 4c 89 ee e8 c5 38 29 03 e9 c2 fd ff ff 0f 1e fa 4d 89 f7 4c 89 eb 65 8b 05 83 fd e1 10 83 f8 08 73 55 RSP: 0018:ffffc90004e9f298 EFLAGS: 00000282 RAX: 09759d9ecb917e00 RBX: 1ffff920009d3e70 RCX: 0000000000080000 RDX: ffffc9000db6a000 RSI: ffffffff81cc82a7 RDI: ffffffff8df41aa0 RBP: ffffc90004e9f418 R08: ffffc90004e9f3af R09: 0000000000000000 R10: ffffc90004e9f3a0 R11: ffffffffa0201650 R12: 0000000000000000 R13: ffffffff81cc82a7 R14: ffffffff8df41aa0 R15: ffff888033eec180 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] trace_call_bpf+0x7ad/0xb60 kernel/trace/bpf_trace.c:147 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11000 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+0x2ef/0x340 kernel/locking/lockdep.c:5831 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __pte_offset_map_lock+0x13e/0x210 mm/pgtable-generic.c:403 get_locked_pte include/linux/mm.h:2984 [inline] __text_poke+0x2cf/0x990 arch/x86/kernel/alternative.c:2525 text_poke arch/x86/kernel/alternative.c:2610 [inline] smp_text_poke_batch_finish+0xd0f/0x1130 arch/x86/kernel/alternative.c:2999 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 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:10941 perf_try_init_event+0x17f/0x870 kernel/events/core.c:12690 perf_init_event kernel/events/core.c:12788 [inline] perf_event_alloc+0x1430/0x2d50 kernel/events/core.c:13063 __do_sys_perf_event_open kernel/events/core.c:13581 [inline] __se_sys_perf_event_open+0x756/0x1d90 kernel/events/core.c:13462 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9a2178f749 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:00007f9a22662038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f9a219e5fa0 RCX: 00007f9a2178f749 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007f9a21813f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9a219e6038 R14: 00007f9a219e5fa0 R15: 00007ffed65b01d8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:trace_hardirqs_on+0xf/0x40 kernel/trace/trace_preemptirq.c:73 Code: ff ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 b5 6f b8 10 85 c0 74 14 <48> 8b 3c 24 e8 d8 fe ff ff 65 c7 05 9d 6f b8 10 00 00 00 00 e8 98 RSP: 0018:ffffc900001d7cf0 EFLAGS: 00000002 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000004208040 RDX: 0000000000000100 RSI: ffffffff8d97773b RDI: ffffffff8bc08a60 RBP: 0000000080000000 R08: ffffffff8f822a77 R09: 1ffffffff1f0454e R10: dffffc0000000000 R11: fffffbfff1f0454f R12: ffff88801ca95b98 R13: ffff88801ca97338 R14: 1ffff11003952e67 R15: ffffffff818f3aed FS: 0000000000000000(0000) GS:ffff888125f1e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9bc0515000 CR3: 000000002fbbe000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ksoftirqd_run_end kernel/softirq.c:479 [inline] run_ksoftirqd+0x3b/0x60 kernel/softirq.c:1064 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246