rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=421/1/0x4000000000000000 softirq=90794/90794 fqs=38 
	(t=10501 jiffies g=157973 q=359)
rcu: rcu_preempt kthread starved for 10426 jiffies! g157973 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:R  running task     stack:26768 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0xc8d/0x1270 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8531 Comm: syz-executor.5 Not tainted 5.15.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196
Code: 00 00 0f 1f 40 00 be 0d 00 00 00 48 c7 c7 00 8c 95 8c e8 ff 60 4b 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0c 25 c0 ef 01 00 65 8b 15 14 7d 7f 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc90000007638 EFLAGS: 00000086
RAX: ffffffff81010c3a RBX: 0000000000000002 RCX: 0000000000000002
RDX: ffff8880751cd580 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90000007790 R08: ffffffff81010bf0 R09: ffffc900000076c0
R10: fffff52000000ee4 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000000ed4 R14: ffffc90004c2edb8 R15: ffffc900000076c0
FS:  00007f72f91a6700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000008ae57000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000d0eb
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 get_stack_pointer arch/x86/include/asm/stacktrace.h:83 [inline]
 unwind_start arch/x86/include/asm/unwind.h:58 [inline]
 perf_callchain_kernel+0x2fa/0x640 arch/x86/events/core.c:2777
 get_perf_callchain+0x602/0x7a0 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7291 [inline]
 perf_prepare_sample+0x2f7/0x1770 kernel/events/core.c:7318
 __perf_event_output kernel/events/core.c:7487 [inline]
 perf_event_output_forward+0x176/0x2c0 kernel/events/core.c:7507
 __perf_event_overflow+0x1f8/0x380 kernel/events/core.c:9177
 perf_swevent_hrtimer+0x3d1/0x530 kernel/events/core.c:10567
 __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:lock_is_held_type+0x141/0x190
Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90004c2ee60 EFLAGS: 00000206
RAX: 2f8287dac1b61000 RBX: 0000000000000001 RCX: 0000000080000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000002 R08: dffffc0000000000 R09: ffffed10173864a2
R10: ffffed10173864a2 R11: 0000000000000000 R12: 0000000000000246
R13: ffff8880751cd580 R14: 00000000ffffffff R15: ffffffff8c91c1c0
 tdp_iter_refresh_sptep+0x12a/0x250 arch/x86/kvm/mmu/tdp_iter.c:15
 kvm_tdp_mmu_fast_pf_get_last_sptep+0x2a6/0x420 arch/x86/kvm/mmu/tdp_mmu.c:1580
 fast_page_fault arch/x86/kvm/mmu/mmu.c:3224 [inline]
 direct_page_fault+0x57e/0x2b00 arch/x86/kvm/mmu/mmu.c:3981
 kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:127 [inline]
 kvm_mmu_page_fault+0x1a3/0x13d0 arch/x86/kvm/mmu/mmu.c:5287
 vmx_handle_exit+0x26/0x160 arch/x86/kvm/vmx/vmx.c:6051
 vcpu_enter_guest+0x6813/0x96b0 arch/x86/kvm/x86.c:9735
 vcpu_run+0x4d3/0xe50 arch/x86/kvm/x86.c:9802
 kvm_arch_vcpu_ioctl_run+0x5c0/0xdb0 arch/x86/kvm/x86.c:10034
 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: 0033:0x7f72fbc2f8d9
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:00007f72f91a6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f72fbd33f60 RCX: 00007f72fbc2f8d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f72fbc89cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff8e7049f R14: 00007f72f91a6300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 8516 Comm: syz-executor.3 Not tainted 5.15.0-rc4-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_dump_cpu_stacks+0x22d/0x390 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+0x1e33/0x2bc0 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:lock_acquire+0x21f/0x4d0 kernel/locking/lockdep.c:5629
Code: 08 4c 89 f7 e8 b2 e4 69 00 f6 84 24 81 00 00 00 02 0f 85 13 02 00 00 41 f7 c4 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 09 00 00 00 00 43 c7 44 2f 11
RSP: 0018:ffffc900044bec20 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000897d94 RCX: ffff88801d72a670
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900044bed78 R08: dffffc0000000000 R09: fffffbfff1fa33c7
R10: fffffbfff1fa33c7 R11: 0000000000000000 R12: 0000000000000246
R13: 1ffff92000897d8c R14: ffffc900044beca0 R15: dffffc0000000000
 down_read+0x3b/0x50 kernel/locking/rwsem.c:1464
 mmap_read_lock include/linux/mmap_lock.h:117 [inline]
 hva_to_pfn+0x2b3/0xbe0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2405
 kvm_faultin_pfn+0x366/0x900 arch/x86/kvm/mmu/mmu.c:3942
 direct_page_fault+0x11f0/0x2b00 arch/x86/kvm/mmu/mmu.c:3992
 kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:127 [inline]
 kvm_mmu_page_fault+0x1a3/0x13d0 arch/x86/kvm/mmu/mmu.c:5287
 vmx_handle_exit+0x26/0x160 arch/x86/kvm/vmx/vmx.c:6051
 vcpu_enter_guest+0x6813/0x96b0 arch/x86/kvm/x86.c:9735
 vcpu_run+0x4d3/0xe50 arch/x86/kvm/x86.c:9802
 kvm_arch_vcpu_ioctl_run+0x5c0/0xdb0 arch/x86/kvm/x86.c:10034
 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: 0033:0x7f7f395d58d9
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:00007f7f36b4c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7f396d9f60 RCX: 00007f7f395d58d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f7f3962fcb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe582e526f R14: 00007f7f36b4c300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	0f 1f 40 00          	nopl   0x0(%rax)
   6:	be 0d 00 00 00       	mov    $0xd,%esi
   b:	48 c7 c7 00 8c 95 8c 	mov    $0xffffffff8c958c00,%rdi
  12:	e8 ff 60 4b 00       	callq  0x4b6116
  17:	c3                   	retq
  18:	cc                   	int3
  19:	cc                   	int3
  1a:	cc                   	int3
  1b:	cc                   	int3
  1c:	cc                   	int3
  1d:	cc                   	int3
  1e:	cc                   	int3
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	cc                   	int3
  23:	cc                   	int3
  24:	cc                   	int3
  25:	cc                   	int3
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 0c 25 c0 ef 	mov    %gs:0x1efc0,%rcx <-- trapping instruction
  31:	01 00
  33:	65 8b 15 14 7d 7f 7e 	mov    %gs:0x7e7f7d14(%rip),%edx        # 0x7e7f7d4e
  3a:	f7 c2 00 01 ff 00    	test   $0xff0100,%edx