rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=68805, q=104)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295000921-4294990419), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g68805 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:25912 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0xb72/0x1460 kernel/sched/core.c:6287
 schedule+0x14b/0x210 kernel/sched/core.c:6366
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1957
 rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2130
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 21719 Comm: syz-executor.4 Not tainted 5.15.0-rc7-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+0x1dc/0x2d8 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_check_gp_kthread_starvation+0x1ff/0x270 kernel/rcu/tree_stall.h:481
 print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
 rcu_pending kernel/rcu/tree.c:3880 [inline]
 rcu_sched_clock_irq+0x23d5/0x2bc0 kernel/rcu/tree.c:2599
 update_process_times+0x197/0x200 kernel/time/timer.c:1785
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:preempt_count_add+0xe4/0x130 kernel/sched/core.c:5403
Code: 38 84 c0 75 4b 83 3d 32 b1 82 0c 00 75 81 48 c7 c7 40 42 4e 8a 48 c7 c6 80 42 4e 8a 31 c0 e8 f3 45 f4 ff 0f 0b e9 65 ff ff ff <48> c7 c1 00 39 93 90 80 e1 07 80 c1 03 38 c1 0f 8c 36 ff ff ff 48
RSP: 0018:ffffc90004127460 EFLAGS: 00000202
RAX: 1ffffffff2126704 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90012304000 RSI: 000000000003ffff RDI: 0000000000000001
RBP: ffffc90004127b88 R08: ffffffff8111cf99 R09: ffffed100ddd9808
R10: ffffed100ddd9808 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffc90004127600 R15: dffffc0000000000
 vcpu_enter_guest+0x5ce2/0x9650 arch/x86/kvm/x86.c:9594
 vcpu_run+0x4d3/0xe50 arch/x86/kvm/x86.c:9819
 kvm_arch_vcpu_ioctl_run+0x5c0/0xdb0 arch/x86/kvm/x86.c:10051
 kvm_vcpu_ioctl+0x894/0xe20 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+0xfb/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fce9e284a39
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:00007fce9b7fa188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fce9e397f60 RCX: 00007fce9e284a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fce9e2dee8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0c3f2aaf R14: 00007fce9b7fa300 R15: 0000000000022000
----------------
Code disassembly (best guess):
   0:	38 84 c0 75 4b 83 3d 	cmp    %al,0x3d834b75(%rax,%rax,8)
   7:	32 b1 82 0c 00 75    	xor    0x75000c82(%rcx),%dh
   d:	81 48 c7 c7 40 42 4e 	orl    $0x4e4240c7,-0x39(%rax)
  14:	8a 48 c7             	mov    -0x39(%rax),%cl
  17:	c6 80 42 4e 8a 31 c0 	movb   $0xc0,0x318a4e42(%rax)
  1e:	e8 f3 45 f4 ff       	callq  0xfff44616
  23:	0f 0b                	ud2
  25:	e9 65 ff ff ff       	jmpq   0xffffff8f
* 2a:	48 c7 c1 00 39 93 90 	mov    $0xffffffff90933900,%rcx <-- trapping instruction
  31:	80 e1 07             	and    $0x7,%cl
  34:	80 c1 03             	add    $0x3,%cl
  37:	38 c1                	cmp    %al,%cl
  39:	0f 8c 36 ff ff ff    	jl     0xffffff75
  3f:	48                   	rex.W