ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 sched: DL replenish lagged too much watchdog: BUG: soft lockup - CPU#1 stuck for 208s! [kworker/u8:3:48] Modules linked in: irq event stamp: 3022637 hardirqs last enabled at (3022636): [] kvm_wait arch/x86/kernel/kvm.c:1096 [inline] hardirqs last enabled at (3022636): [] kvm_wait+0x11f/0x160 arch/x86/kernel/kvm.c:1078 hardirqs last disabled at (3022637): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (2933726): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (2933726): [] cfg80211_inform_single_bss_data+0x959/0x1dc0 net/wireless/scan.c:2398 softirqs last disabled at (2933727): [] do_softirq kernel/softirq.c:523 [inline] softirqs last disabled at (2933727): [] do_softirq+0xac/0xe0 kernel/softirq.c:510 CPU: 1 UID: 0 PID: 48 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: 66 8d 02 e9 8e 98 56 f5 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d c3 de 11 00 fb f4 67 98 56 f5 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc90000a08260 EFLAGS: 00000242 RAX: 00000000002e1f2c RBX: 0000000000000003 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffffff8e1a9f82 RDI: ffffffff8c400980 RBP: ffff88807dae0150 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000003 R14: ffff8880b853c600 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888123ede000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d65019000 CR3: 00000000213fe000 CR4: 0000000000350ef0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline] kvm_wait arch/x86/kernel/kvm.c:1096 [inline] kvm_wait+0x124/0x160 arch/x86/kernel/kvm.c:1078 pv_wait arch/x86/include/asm/paravirt-spinlock.h:83 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline] __pv_queued_spin_lock_slowpath+0x4b0/0xc00 kernel/locking/qspinlock.c:325 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline] queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x1e0/0x260 kernel/locking/spinlock_debug.c:116 spin_lock_bh include/linux/spinlock.h:348 [inline] cfg80211_inform_single_bss_data+0x752/0x1dc0 net/wireless/scan.c:2377 cfg80211_inform_bss_data+0x230/0x3b60 net/wireless/scan.c:3241 cfg80211_inform_bss_frame_data+0x245/0x7c0 net/wireless/scan.c:3333 ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x4e6/0xb60 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet+0xbab/0xfc0 net/mac80211/rx.c:5427 ieee80211_rx_list+0xf19/0x2160 net/mac80211/rx.c:5720 ieee80211_rx_napi+0xdc/0x400 net/mac80211/rx.c:5743 ieee80211_rx include/net/mac80211.h:5437 [inline] ieee80211_handle_queued_frames+0xc8/0x120 net/mac80211/main.c:452 tasklet_action_common+0x2de/0x3d0 kernel/softirq.c:938 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 do_softirq kernel/softirq.c:523 [inline] do_softirq+0xac/0xe0 kernel/softirq.c:510 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450 spin_unlock_bh include/linux/spinlock.h:396 [inline] cfg80211_inform_single_bss_data+0x959/0x1dc0 net/wireless/scan.c:2398 cfg80211_inform_bss_data+0x230/0x3b60 net/wireless/scan.c:3241 cfg80211_inform_bss_frame_data+0x245/0x7c0 net/wireless/scan.c:3333 ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1063 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1544 [inline] ieee80211_ibss_rx_queued_mgmt+0xe04/0x1c70 net/mac80211/ibss.c:1571 ieee80211_iface_process_skb net/mac80211/iface.c:1769 [inline] ieee80211_iface_work+0xa9a/0x1070 net/mac80211/iface.c:1823 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8769 Comm: kworker/u8:20 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x20 kernel/kcov.c:300 Code: bf 06 00 00 00 e9 b8 fe 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 48 8b 0c 24 <40> 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 86 fe ff ff 66 0f 1f 44 RSP: 0018:ffffc90000007de0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff89c6fc32 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88805fc0d000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: 18c6175a378f73c0 R14: ffff88805fc0f008 R15: ffff88805fc0f000 FS: 0000000000000000(0000) GS:ffff888123dde000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9b9cfb5e9c CR3: 000000000e994000 CR4: 0000000000350ef0 Call Trace: rcu_read_unlock include/linux/rcupdate.h:869 [inline] advance_sched+0x952/0xd20 net/sched/sch_taprio.c:994 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:write_comp_data+0x7/0x90 kernel/kcov.c:240 Code: 7c 24 08 e8 cb 96 6f 00 e9 6d fd ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 59 e8 59 12 <49> 89 f8 49 89 f1 49 89 d2 65 48 8b 3d 30 e8 59 12 a9 00 01 ff 00 RSP: 0018:ffffc90006fceed8 EFLAGS: 00000202 RAX: 0000000080000201 RBX: 0000000000000015 RCX: ffffffff8b3ca0d1 RDX: 0000000000000001 RSI: 000000000000007f RDI: 0000000000000001 RBP: ffffffff8d412ea0 R08: 0000000000000001 R09: 000000000000007e R10: 0000000000000001 R11: ffff88808d5b3000 R12: 0000000000000001 R13: 0000000000000020 R14: 0000000000000001 R15: ffff88805a015126 __sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:351 _ieee802_11_parse_elems_full+0x301/0x5200 net/mac80211/parse.c:355 ieee802_11_parse_elems_full+0xc6a/0x3bc0 net/mac80211/parse.c:1145 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2551 [inline] ieee80211_inform_bss+0x159/0x1170 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0x898/0x1dc0 net/wireless/scan.c:2382 cfg80211_inform_bss_data+0x230/0x3b60 net/wireless/scan.c:3241 cfg80211_inform_bss_frame_data+0x245/0x7c0 net/wireless/scan.c:3333 ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1063 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1544 [inline] ieee80211_ibss_rx_queued_mgmt+0xe04/0x1c70 net/mac80211/ibss.c:1571 ieee80211_iface_process_skb net/mac80211/iface.c:1769 [inline] ieee80211_iface_work+0xa9a/0x1070 net/mac80211/iface.c:1823 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245