watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.8.1338:11363] Modules linked in: irq event stamp: 11973045 hardirqs last enabled at (11973044): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (11973045): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (11964612): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (11964612): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (11964612): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (11964615): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (11964615): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (11964615): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 11363 Comm: syz.8.1338 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_acquire+0x277/0x360 kernel/locking/lockdep.c:-1 Code: 01 90 48 c7 c7 33 0e 7d 8d e8 f5 cc e5 ff 90 0f 0b 90 90 83 3d 79 6e 01 0e 00 0f 85 10 fe ff ff e9 fb fe ff ff e8 49 ab aa 09 0f 1e fa 4c 89 6c 24 18 4c 89 64 24 20 4c 89 7c 24 28 4c 89 74 RSP: 0018:ffffc90000006ab8 EFLAGS: 00000286 RAX: 23dfe4c2e8385100 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e13b260 RBP: ffffffff8172ad45 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90000006788 R11: ffffffff81ab4d30 R12: 0000000000000002 R13: ffffffff8e13b260 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f3818d4c6c0(0000) GS:ffff888125d27000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c302f35 CR3: 000000006b210000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000082 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:find_next_bit include/linux/find.h:69 [inline] RIP: 0010:smp_call_function_many_cond+0xc58/0x12d0 kernel/smp.c:873 Code: 45 31 ff 4c 89 f0 48 c1 e8 03 48 89 44 24 08 4c 89 e0 48 c1 e8 03 48 89 44 24 40 4c 89 74 24 18 48 8b 44 24 08 42 80 3c 28 00 <74> 08 4c 89 f7 e8 de 12 71 00 41 0f b6 06 48 c7 c3 ff ff ff ff 44 RSP: 0018:ffffc9001887f600 EFLAGS: 00000246 RAX: 1ffff110170c7649 RBX: 1ffff110170e7ffd RCX: 0000000000080000 RDX: ffffc9000cd2d000 RSI: 0000000000004915 RDI: 0000000000004916 RBP: ffffc9001887f780 R08: ffffffff8f9db437 R09: 1ffffffff1f3b686 R10: dffffc0000000000 R11: fffffbfff1f3b687 R12: ffff8880b863b240 R13: dffffc0000000000 R14: ffff8880b863b248 R15: 0000000000000002 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2653 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2863 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/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3817f8eec9 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:00007f3818d4c038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f38181e5fa0 RCX: 00007f3817f8eec9 RDX: 0000000100000001 RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007f3818011f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f38181e6038 R14: 00007f38181e5fa0 R15: 00007ffcb076ea88 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 11335 Comm: syz.5.1330 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_current kernel/rcu/tree_plugin.h:413 [inline] RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:391 [inline] RIP: 0010:__rcu_read_lock+0x4/0x60 kernel/rcu/tree_plugin.h:414 Code: 7e 00 e9 cc fa ff ff 66 66 66 66 66 66 2e 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 <53> 65 48 8b 1c 25 08 90 8f 92 48 81 c3 84 04 00 00 48 89 d8 48 c1 RSP: 0018:ffffc90000a08578 EFLAGS: 00000046 RAX: ffffffff81ca896b RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888025261e40 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a08698 R08: 0000000000000001 R09: ffff8880b8732a68 R10: ffffe8ffffdd800c R11: fffff91ffffbb003 R12: ffffe8ffffdd8000 R13: dffffc0000000000 R14: ffff8880b8732a68 R15: ffffffff8e19d020 FS: 00007ff2553df6c0(0000) GS:ffff888125e27000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15b8fd7f98 CR3: 0000000075bb0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_lock include/linux/rcupdate.h:839 [inline] trace_call_bpf+0xc0/0xb50 kernel/trace/bpf_trace.c:-1 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10931 do_perf_trace_preemptirq_template include/trace/events/preemptirq.h:14 [inline] perf_trace_preemptirq_template+0x280/0x340 include/trace/events/preemptirq.h:14 __do_trace_irq_enable include/trace/events/preemptirq.h:40 [inline] trace_irq_enable+0xee/0x110 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:73 irqentry_exit+0x74/0x90 kernel/entry/common.c:214 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:sched_balance_rq+0x430a/0x57a0 kernel/sched/fair.c:11819 Code: 00 f6 84 24 a1 03 00 00 02 48 8b 9c 24 a8 00 00 00 0f 85 f3 00 00 00 f7 44 24 28 00 02 00 00 74 01 fb 44 8b b4 24 00 04 00 00 <41> f6 c6 02 0f 85 ff ef ff ff 41 f6 c6 04 0f 84 af 02 00 00 48 83 RSP: 0018:ffffc90000a088c0 EFLAGS: 00000206 RAX: 6ee35eac73e64e00 RBX: 0000000000000010 RCX: 6ee35eac73e64e00 RDX: 0000000000000002 RSI: ffffffff8d7e3703 RDI: ffffffff8bc060e0 RBP: ffffc90000a08d78 R08: ffffffff8f9db437 R09: 1ffffffff1f3b686 R10: dffffc0000000000 R11: fffffbfff1f3b687 R12: ffffc90000a08cd8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b873ae70 sched_balance_domains+0x49f/0x9e0 kernel/sched/fair.c:12227 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:lock_acquire+0x277/0x360 kernel/locking/lockdep.c:-1 Code: 01 90 48 c7 c7 33 0e 7d 8d e8 f5 cc e5 ff 90 0f 0b 90 90 83 3d 79 6e 01 0e 00 0f 85 10 fe ff ff e9 fb fe ff ff e8 49 ab aa 09 0f 1e fa 4c 89 6c 24 18 4c 89 64 24 20 4c 89 7c 24 28 4c 89 74 RSP: 0018:ffffc900189e6678 EFLAGS: 00000286 RAX: 6ee35eac73e64e00 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e13b260 RBP: ffffffff8172ad45 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc900189e6838 R11: ffffffff81ab4d30 R12: 0000000000000002 R13: ffffffff8e13b260 R14: 0000000000000000 R15: 0000000000000000 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 mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2514 [inline] slab_free mm/slub.c:6566 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6676 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] consume_skb+0x9e/0xf0 net/core/skbuff.c:1398 netlink_broadcast_filtered+0xec7/0x1000 net/netlink/af_netlink.c:1537 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline] nlmsg_multicast include/net/netlink.h:1184 [inline] nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2595 __devinet_sysctl_unregister net/ipv4/devinet.c:2704 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2728 [inline] inetdev_destroy net/ipv4/devinet.c:334 [inline] inetdev_event+0x77f/0x15b0 net/ipv4/devinet.c:1655 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] unregister_netdevice_many_notify+0x14d7/0x1ff0 net/core/dev.c:12254 rtnl_delete_link net/core/rtnetlink.c:3521 [inline] rtnl_dellink+0x489/0x700 net/core/rtnetlink.c:3563 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 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: 0033:0x7ff25458eec9 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:00007ff2553df038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff2547e5fa0 RCX: 00007ff25458eec9 RDX: 0000000024000000 RSI: 00002000000001c0 RDI: 0000000000000008 RBP: 00007ff254611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff2547e6038 R14: 00007ff2547e5fa0 R15: 00007ffc16104868