sched: DL replenish lagged too much rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=131953, q=2064 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 9331 (4295016818-4295007487), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 9332 jiffies! g131953 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:28392 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5504 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7228 __schedule_loop kernel/sched/core.c:7307 [inline] schedule+0x164/0x360 kernel/sched/core.c:7322 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6404 Comm: kworker/R-bond1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: bond1 bond_alb_monitor RIP: 0010:mac80211_hwsim_tx_frame_no_nl+0x880/0x1760 drivers/net/wireless/virtual/mac80211_hwsim_main.c:1955 Code: 00 01 00 00 48 89 84 24 58 01 00 00 49 8d 5d 18 49 89 de 49 c1 ee 03 43 80 3c 26 00 74 08 48 89 df e8 54 6f 25 fb 49 8b 45 18 <48> 89 84 24 60 01 00 00 48 c7 84 24 68 01 00 00 00 00 00 00 4c 39 RSP: 0018:ffffc90000007aa0 EFLAGS: 00000246 RAX: ffff88803cb20f40 RBX: ffff88803cb23238 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000007c10 RBP: ffffc90000007ca0 R08: ffffc90000007c0f R09: 0000000000000000 R10: ffffc90000007c00 R11: fffff52000000f82 R12: dffffc0000000000 R13: ffff88803cb23220 R14: 1ffff11007964647 R15: 1ffff92000000f70 FS: 0000000000000000(0000) GS:ffff88812527c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2ac2f456b8 CR3: 0000000076cc8000 CR4: 00000000003526f0 Call Trace: mac80211_hwsim_tx_frame+0x199/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2406 mac80211_hwsim_beacon_tx+0x396/0x820 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2482 __iterate_interfaces+0x2af/0x5a0 net/mac80211/util.c:772 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:808 mac80211_hwsim_beacon+0xaf/0x240 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2514 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2113 handle_softirqs+0x225/0x840 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x220 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+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:native_irq_enable arch/x86/include/asm/irqflags.h:-1 [inline] RIP: 0010:arch_local_irq_enable arch/x86/include/asm/irqflags.h:119 [inline] RIP: 0010:raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline] RIP: 0010:__schedule+0x1da2/0x56c0 kernel/sched/core.c:7233 Code: 31 f6 e8 01 cb eb f5 4c 89 ff e8 a9 d7 ec f5 0f 1f 44 00 00 49 83 c7 48 4c 89 ff e8 78 c1 01 00 e8 13 59 25 f6 fb 4c 8b 24 24 3a fa ff ff 90 0f 0b 90 f7 c6 01 01 00 00 0f 85 2a e8 ff ff e9 RSP: 0018:ffffc900054af7c0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff92000a95f1c RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8c291100 RDI: ffffffff8ba8c9dd RBP: ffffc900054af9a8 R08: ffffffff903117f7 R09: 1ffffffff20622fe R10: dffffc0000000000 R11: fffffbfff20622ff R12: ffff888027cdbe00 R13: dffffc0000000000 R14: ffff888027cdbe00 R15: ffff8880b863afc8 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__might_resched+0x0/0x4d0 kernel/sched/core.c:9148 Code: 9c 00 4c 89 e7 89 ee e9 57 ff ff ff 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 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 89 d3 89 74 RSP: 0018:ffffc900054afad8 EFLAGS: 00000246 RAX: ffffffff818e401e RBX: 0000000000000000 RCX: ffff888027cdbe00 RDX: 0000000000000000 RSI: 0000000000000d13 RDI: ffffffff8bcb5740 RBP: ffffc900054afce0 R08: ffffffff903117f7 R09: 1ffffffff20622fe R10: dffffc0000000000 R11: fffffbfff20622ff R12: ffff888034895558 R13: dffffc0000000000 R14: ffff888034895560 R15: 1ffff11006912aab process_one_work kernel/workqueue.c:3347 [inline] process_scheduled_works+0xd21/0x14e0 kernel/workqueue.c:3397 rescuer_thread+0x7b6/0x10b0 kernel/workqueue.c:3621 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ip6_tunnel: ip6gre1 xmit: Local address not yet configured!