rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=4bb/1/0x4000000000000000 softirq=14782/14782 fqs=0 
	(t=10500 jiffies g=19381 q=208)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g19381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=13230
rcu: rcu_preempt kthread starved for 10500 jiffies! g19381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27352 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
 print_cpu_stall+0x31b/0x600 kernel/rcu/tree_stall.h:631
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:find_entry_to_transmit+0x17f/0x810 net/sched/sch_taprio.c:211
Code: c7 04 24 00 00 00 00 4c 89 e8 48 c1 e8 03 48 89 44 24 70 42 80 3c 30 00 74 08 4c 89 ef e8 f9 ce 3d f9 49 c7 45 00 00 00 00 00 <4d> 85 ff 0f 84 b2 05 00 00 49 8d 5f 30 48 89 d8 48 c1 e8 03 48 89
RSP: 0018:ffffc90000d370f0 EFLAGS: 00000246
RAX: 1ffff920001a6e5e RBX: ffff8880616e8ae0 RCX: 20c49ba5e353f7cf
RDX: 00000000000001c0 RSI: 0000000000000008 RDI: ffff8880616e8ae0
RBP: 00000000000001c0 R08: dffffc0000000000 R09: ffffed100c2dd15d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d37310
R13: ffffc90000d372f0 R14: dffffc0000000000 R15: ffff88802a0fe280
 get_packet_txtime net/sched/sch_taprio.c:379 [inline]
 taprio_enqueue_one+0x102e/0x16a0 net/sched/sch_taprio.c:426
 dev_qdisc_enqueue+0x47/0x240 net/core/dev.c:3851
 __dev_xmit_skb net/core/dev.c:3935 [inline]
 __dev_queue_xmit+0xe32/0x32b0 net/core/dev.c:4252
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0xee8/0x15a0 net/ipv6/ip6_output.c:130
 dst_output include/net/dst.h:452 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xb98/0x1520 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:find_entry_to_transmit+0x17f/0x810 net/sched/sch_taprio.c:211
Code: c7 04 24 00 00 00 00 4c 89 e8 48 c1 e8 03 48 89 44 24 70 42 80 3c 30 00 74 08 4c 89 ef e8 f9 ce 3d f9 49 c7 45 00 00 00 00 00 <4d> 85 ff 0f 84 b2 05 00 00 49 8d 5f 30 48 89 d8 48 c1 e8 03 48 89
RSP: 0018:ffffc90000d370f0 EFLAGS: 00000246
RAX: 1ffff920001a6e5e RBX: ffff8880616e8ae0 RCX: 20c49ba5e353f7cf
RDX: 00000000000001c0 RSI: 0000000000000008 RDI: ffff8880616e8ae0
RBP: 00000000000001c0 R08: dffffc0000000000 R09: ffffed100c2dd15d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d37310
R13: ffffc90000d372f0 R14: dffffc0000000000 R15: ffff88802a0fe280
 get_packet_txtime net/sched/sch_taprio.c:379 [inline]
 taprio_enqueue_one+0x102e/0x16a0 net/sched/sch_taprio.c:426
 dev_qdisc_enqueue+0x47/0x240 net/core/dev.c:3851
 __dev_xmit_skb net/core/dev.c:3935 [inline]
 __dev_queue_xmit+0xe32/0x32b0 net/core/dev.c:4252
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0xee8/0x15a0 net/ipv6/ip6_output.c:130
 dst_output include/net/dst.h:452 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xb98/0x1520 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
vkms_vblank_simulate: vblank timer overrun