sched: DL replenish lagged too much watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [kworker/u8:8:15356] Modules linked in: irq event stamp: 745879 hardirqs last enabled at (745878): [] kvm_wait arch/x86/kernel/kvm.c:1096 [inline] hardirqs last enabled at (745878): [] kvm_wait+0x11f/0x160 arch/x86/kernel/kvm.c:1078 hardirqs last disabled at (745879): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (643128): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (643128): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (643128): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (643137): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (643137): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (643137): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 0 UID: 0 PID: 15356 Comm: kworker/u8:8 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: 86 8d 02 e9 8e c8 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 0e 12 00 fb f4 67 c8 56 f5 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc90000007970 EFLAGS: 00000246 RAX: 00000000000b6196 RBX: 0000000000000003 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffffff8e1a9a13 RDI: ffffffff8c400980 RBP: ffffffff8ffb6500 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000003 R14: ffff8880b843c600 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888123ddf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55fb7eb158 CR3: 000000000e994000 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 include/linux/spinlock.h:342 [inline] mac80211_hwsim_tx_frame_no_nl+0x745/0x1830 drivers/net/wireless/virtual/mac80211_hwsim_main.c:1963 mac80211_hwsim_tx_frame+0x1b7/0x250 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2417 __mac80211_hwsim_beacon_tx drivers/net/wireless/virtual/mac80211_hwsim_main.c:2430 [inline] mac80211_hwsim_beacon_tx+0x56c/0xa00 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2493 __iterate_interfaces+0x2e6/0x650 net/mac80211/util.c:775 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:811 mac80211_hwsim_beacon+0xe5/0x2a0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2525 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2113 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x589/0x16c0 kernel/smp.c:892 Code: b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 b9 95 0c 00 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 2c 0f 00 00 8b 45 08 31 RSP: 0018:ffffc900085bf878 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81fda5ed RDX: ffff88802a553e00 RSI: ffffffff81fda5c7 RDI: ffff88802a553e00 RBP: ffff8880b8541380 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed10170a8271 R14: 0000000000000001 R15: ffff8880b843c9c0 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline] smp_text_poke_batch_finish+0x337/0xc60 arch/x86/kernel/alternative.c:2983 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x37a/0x550 kernel/jump_label.c:910 static_key_enable_cpuslocked+0x1bc/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:911 [inline] toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:903 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6753 Comm: kworker/u8:15 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:enqueue_hrtimer+0x58/0x2f0 kernel/time/hrtimer.c:1107 Code: e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 39 02 00 00 44 8b 35 76 0b 2d 0f 31 ff 44 89 f6 e8 d8 74 14 00 <45> 85 f6 0f 85 bd 01 00 00 e8 5a 7a 14 00 48 c7 c6 80 f9 d2 8b 48 RSP: 0018:ffffc90000a08e68 EFLAGS: 00000046 RAX: 0000000000010203 RBX: ffff8880b8528540 RCX: ffffffff81f5c118 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88802ba53e00 RBP: ffff8880537f6300 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880b8528590 FS: 0000000000000000(0000) GS:ffff888123edf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9c48000000 CR3: 000000008f9c9000 CR4: 0000000000350ef0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:2048 [inline] __hrtimer_run_queues+0x6ed/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:check_preemption_disabled+0x1a/0xe0 lib/smp_processor_id.c:16 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d d5 75 aa 08 65 f7 05 c6 75 aa 08 ff ff ff 7f <74> 0f 48 83 c4 08 89 d8 5b 5d 41 5c e9 90 a6 56 f5 9c 58 f6 c4 02 RSP: 0018:ffffc900043af238 EFLAGS: 00000202 RAX: ffff88802ba53e00 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8c400900 RDI: ffffffff8c400940 RBP: 0000000000082820 R08: 0000000039d6244f R09: 000000000000002c R10: 0000000000000200 R11: ffffffff826e29c4 R12: 0000000000082800 R13: 00000000ffffffff R14: ffffffff94664d90 R15: 00000000ffffffff alloc_from_pcs mm/slub.c:4770 [inline] slab_alloc_node mm/slub.c:4905 [inline] kmem_cache_alloc_node_noprof+0x168/0x6b0 mm/slub.c:4989 kmalloc_reserve+0x148/0x350 net/core/skbuff.c:615 __alloc_skb+0x185/0x710 net/core/skbuff.c:715 skb_copy+0x1ca/0x3a0 net/core/skbuff.c:2185 mac80211_hwsim_tx_frame_no_nl+0xc7f/0x1830 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2020 mac80211_hwsim_tx+0xe9e/0x26d0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2272 drv_tx net/mac80211/driver-ops.h:38 [inline] ieee80211_tx_frags+0x5c9/0xa70 net/mac80211/tx.c:1746 __ieee80211_tx+0x145/0x5b0 net/mac80211/tx.c:1801 ieee80211_tx+0x336/0x460 net/mac80211/tx.c:1984 ieee80211_xmit+0x30f/0x3e0 net/mac80211/tx.c:2076 __ieee80211_tx_skb_tid_band+0x2c2/0x720 net/mac80211/tx.c:6464 ieee80211_tx_skb_tid_band net/mac80211/ieee80211_i.h:2489 [inline] ieee80211_send_scan_probe_req net/mac80211/scan.c:685 [inline] ieee80211_scan_state_send_probe+0x33d/0xac0 net/mac80211/scan.c:713 ieee80211_scan_work+0x750/0x2010 net/mac80211/scan.c:1174 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