rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=69f/1/0x4000000000000000 softirq=13639/13639 fqs=0 
	(t=10502 jiffies g=15913 q=13)
rcu: rcu_preempt kthread starved for 10503 jiffies! g15913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28952 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0xb44/0x5960 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9093 Comm: syz-executor.3 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5376 [inline]
RIP: 0010:lock_is_held_type+0x10b/0x140 kernel/locking/lockdep.c:5668
Code: 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <45> 31 ed eb b9 0f 0b 48 c7 c7 00 e6 8b 89 e8 72 0d 00 00 65 c7 05
RSP: 0018:ffffc90000fd8ab0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b97f020 RDI: ffff88807942ace0
RBP: ffffffff8b97f020 R08: 0000000000000000 R09: ffff8880b9d32a8b
R10: ffffed10173a6551 R11: 0000000000000000 R12: ffff88807942a2c0
R13: ffff88807942ace0 R14: 00000000ffffffff R15: ffff88807942ace0
FS:  00007f9306e2d700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000004384a000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5596
 seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
 timekeeping_get_delta kernel/time/timekeeping.c:252 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:386 [inline]
 ktime_get+0x147/0x470 kernel/time/timekeeping.c:829
 hrtimer_forward_now include/linux/hrtimer.h:506 [inline]
 perf_swevent_hrtimer+0x246/0x3f0 kernel/events/core.c:10572
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:vmx_do_interrupt_nmi_irqoff+0x10/0x20 arch/x86/kvm/vmx/vmenter.S:327
Code: 41 5b 41 5a 41 59 41 58 5e 5f 5a 59 58 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 83 e4 f0 6a 18 55 9c 6a 10 ff d7 <48> 89 ec 5d c3 cc cc cc cc cc cc cc cc cc cc cc 41 57 48 8d 47 08
RSP: 0018:ffffc90005117b48 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffff888025074600 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89400bf0
RBP: ffffc90005117b48 R08: 0000000080000000 R09: ffff888025074867
R10: ffffffff811ea28c R11: 0000000000000000 R12: 0000000000000bf0
R13: 0000000089400000 R14: 0000000000000000 R15: ffff888025074630
 handle_interrupt_nmi_irqoff arch/x86/kvm/vmx/vmx.c:6347 [inline]
 handle_external_interrupt_irqoff arch/x86/kvm/vmx/vmx.c:6377 [inline]
 vmx_handle_exit_irqoff arch/x86/kvm/vmx/vmx.c:6388 [inline]
 vmx_handle_exit_irqoff+0x4d2/0x750 arch/x86/kvm/vmx/vmx.c:6380
 vcpu_enter_guest+0x2698/0x4410 arch/x86/kvm/x86.c:9701
 vcpu_run arch/x86/kvm/x86.c:9819 [inline]
 kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10051
 kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3779
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f93098b7a39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9306e2d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f93099baf60 RCX: 00007f93098b7a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f9309911e8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea6b4263f R14: 00007f9306e2d300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 9086 Comm: syz-executor.2 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3880 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:104 [inline]
RIP: 0010:rcu_read_lock_held+0x0/0x40 kernel/rcu/update.c:309
Code: fd ff ff 48 c7 c7 80 f1 60 8b 48 89 44 24 40 e8 36 aa 5b 00 48 8b 44 24 40 e9 5a fc ff ff e8 17 aa 5b 00 e9 89 fa ff ff 66 90 <e8> 2b 2c d5 07 41 b8 01 00 00 00 85 c0 75 04 44 89 c0 c3 e8 88 8d
RSP: 0018:ffffc900050a75c8 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc900050a76a8 RCX: 000000000000001e
RDX: 1ffff92000a14edc RSI: ffffffff811d15c4 RDI: ffffc900050a76e0
RBP: ffff888078f75000 R08: 000000000000003f R09: ffff8880b9c32a8b
R10: ffffffff811d15b1 R11: 0000000000000000 R12: ffff888078f75000
R13: 000000000000001e R14: ffffc900050a76f8 R15: 1ffff92000a14ecb
 tdp_iter_refresh_sptep+0xf2/0x210 arch/x86/kvm/mmu/tdp_iter.c:15
 try_step_down arch/x86/kvm/mmu/tdp_iter.c:98 [inline]
 tdp_iter_next+0x5f0/0x710 arch/x86/kvm/mmu/tdp_iter.c:163
 kvm_tdp_mmu_fast_pf_get_last_sptep+0x18d/0x2d0 arch/x86/kvm/mmu/tdp_mmu.c:1580
 fast_page_fault arch/x86/kvm/mmu/mmu.c:3224 [inline]
 direct_page_fault+0x70c/0x2320 arch/x86/kvm/mmu/mmu.c:3981
 kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:127 [inline]
 kvm_mmu_page_fault+0x17e/0x17f0 arch/x86/kvm/mmu/mmu.c:5287
 handle_ept_violation+0x29c/0x6e0 arch/x86/kvm/vmx/vmx.c:5325
 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6038 [inline]
 vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6055
 vcpu_enter_guest+0x2a90/0x4410 arch/x86/kvm/x86.c:9752
 vcpu_run arch/x86/kvm/x86.c:9819 [inline]
 kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10051
 kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3779
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0816c6ba39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f08141e1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0816d6ef60 RCX: 00007f0816c6ba39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f0816cc5e8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0ece941f R14: 00007f08141e1300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
   0:	76 83                	jbe    0xffffff85
   2:	f8                   	clc
   3:	01 75 29             	add    %esi,0x29(%rbp)
   6:	9c                   	pushfq
   7:	58                   	pop    %rax
   8:	f6 c4 02             	test   $0x2,%ah
   b:	75 3d                	jne    0x4a
   d:	48 f7 04 24 00 02 00 	testq  $0x200,(%rsp)
  14:	00
  15:	74 01                	je     0x18
  17:	fb                   	sti
  18:	48 83 c4 08          	add    $0x8,%rsp
  1c:	44 89 e8             	mov    %r13d,%eax
  1f:	5b                   	pop    %rbx
  20:	5d                   	pop    %rbp
  21:	41 5c                	pop    %r12
  23:	41 5d                	pop    %r13
  25:	41 5e                	pop    %r14
  27:	41 5f                	pop    %r15
  29:	c3                   	retq
* 2a:	45 31 ed             	xor    %r13d,%r13d <-- trapping instruction
  2d:	eb b9                	jmp    0xffffffe8
  2f:	0f 0b                	ud2
  31:	48 c7 c7 00 e6 8b 89 	mov    $0xffffffff898be600,%rdi
  38:	e8 72 0d 00 00       	callq  0xdaf
  3d:	65                   	gs
  3e:	c7                   	.byte 0xc7
  3f:	05                   	.byte 0x5