rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=898c/1/0x4000000000000000 softirq=38307/38307 fqs=1
	(t=10502 jiffies g=54989 q=4416 ncpus=2)
rcu: rcu_preempt kthread starved for 10489 jiffies! g54989 f0x0 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:I stack:28728 pid:   16 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5182 [inline]
 __schedule+0xadf/0x52b0 kernel/sched/core.c:6494
 schedule+0xda/0x1b0 kernel/sched/core.c:6570
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1657
 rcu_gp_kthread+0x236/0x360 kernel/rcu/tree.c:1854
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3784 Comm: syz-fuzzer Not tainted 6.0.0-rc4-syzkaller-00062-g0066f1b0e275 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0033:0x41e134
Code: 48 8b ac 24 88 00 00 00 48 81 c4 90 00 00 00 c3 48 89 54 24 50 31 c0 eb 04 48 83 c0 08 48 39 c2 0f 86 04 01 00 00 45 0f b6 11 <44> 89 c1 45 89 d5 41 d3 ea 41 0f ba e2 04 0f 83 ec 00 00 00 48 89
RSP: 002b:000000c0006dfe80 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 000000c000021e98 RCX: 000000c0003f5b00
RDX: 0000000000000040 RSI: 0000000000203000 RDI: 0000000000836420
RBP: 000000c0006dff08 R08: 0000000000000000 R09: 00007fa5e1faaad8
R10: 00000000000000fa R11: 00007fa5e218afff R12: 000000c0003f5b00
R13: 0000000000000032 R14: 000000c0017db860 R15: 0000000000000000
FS:  000000c00e092490 GS:  0000000000000000
NMI backtrace for cpu 1
CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.0.0-rc4-syzkaller-00062-g0066f1b0e275 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x2c7/0x4d0 kernel/rcu/tree_stall.h:371
 print_cpu_stall kernel/rcu/tree_stall.h:660 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:744 [inline]
 rcu_pending kernel/rcu/tree.c:3660 [inline]
 rcu_sched_clock_irq.cold+0x9f/0x79c kernel/rcu/tree.c:2342
 update_process_times+0x11a/0x1a0 kernel/time/timer.c:1839
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
 tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1480
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2d/0x60 kernel/kcov.c:200
Code: 09 65 86 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 bc 15 00 00 <85> c0 74 2b 8b 82 98 15 00 00 83 f8 02 75 20 48 8b 8a a0 15 00 00
RSP: 0018:ffffc900001b7b38 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 000000002af31dc4 RCX: 0000000000000100
RDX: ffff888011ba1d80 RSI: ffffffff878ab3f9 RDI: 0000000000000006
RBP: 00000000044b82fa R08: 0000000000000006 R09: 0000000000000000
R10: 00004189374bc6a7 R11: 0000000000000001 R12: 00000000000003e8
R13: 00004189374bc6a7 R14: 0000000000000005 R15: 0000000000000000
 pie_calculate_probability+0x299/0x7c0 net/sched/sch_pie.c:348
 fq_pie_timer+0x170/0x2a0 net/sched/sch_fq_pie.c:383
 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
 run_ksoftirqd kernel/softirq.c:934 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>