rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=fdbc/1/0x4000000000000000 softirq=36937/36938 fqs=0
rcu: 	(t=13852 jiffies g=28061 q=143 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 13851 jiffies! g28061 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=6100
rcu: rcu_preempt kthread starved for 13852 jiffies! g28061 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:27688 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </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 UID: 0 PID: 7740 Comm: syz.1.491 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:do_raw_spin_lock+0x138/0x2f0
Code: df be 04 00 00 00 49 89 d6 e8 14 a9 8e 00 48 8d 7c 24 40 be 04 00 00 00 e8 05 a9 8e 00 8b 44 24 40 b9 01 00 00 00 f0 0f b1 0b <0f> 85 20 01 00 00 43 c6 44 34 04 f8 65 8b 1d 59 8f 96 11 43 0f b6
RSP: 0018:ffffc90000007ac0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff9a749b98 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007b00
RBP: ffffc90000007b80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f60 R12: 1ffff92000000f5c
R13: ffffffff9a749ba0 R14: dffffc0000000000 R15: 1ffffffff34e9374
FS:  00007fb4fcb226c0(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000108d2f000 CR4: 0000000000352ef0
DR0: 0000000000007800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0x4c/0x60
 debug_object_activate+0x83/0x580
 enqueue_hrtimer+0xa9/0x2c0
 __hrtimer_run_queues+0x4d2/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:handle_softirqs+0x160/0x840
Code: 89 6c 24 20 0f b7 db 48 c7 c7 20 1d cb 8b e8 c7 21 20 0a 65 66 c7 05 95 00 b1 11 00 00 e8 e8 07 46 00 fb 48 c7 c5 c0 a0 60 8e <b8> ff ff ff ff 0f bc c3 41 89 c6 41 ff c6 0f 84 09 04 00 00 89 5c
RSP: 0018:ffffc90000007f28 EFLAGS: 00000202
RAX: 0000000000125364 RBX: 0000000000000008 RCX: 0000000080000101
RDX: 0000000000000002 RSI: ffffffff8dfa3d4e RDI: ffffffff8c28ab60
RBP: ffffffff8e60a0c0 R08: ffffffff903098f7 R09: 1ffffffff206131e
R10: dffffc0000000000 R11: fffffbfff206131f R12: 0000000000000000
R13: 0000000000000000 R14: ffff888106694a00 R15: dffffc0000000000
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 common_interrupt+0xbb/0xe0
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40
RIP: 0010:vcpu_run+0x5a02/0x7860
Code: 4c 8b a4 24 28 01 00 00 4c 89 e3 48 c1 eb 03 42 0f b6 04 3b 84 c0 0f 85 1c 0b 00 00 41 c6 04 24 01 e8 92 db 85 00 fb 4c 89 f0 <48> c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 0b eb e8 00 49 ff 06
RSP: 0018:ffffc90005f2f5e0 EFLAGS: 00000202
RAX: ffff8881b97e70e0 RBX: 1ffff110372fcbf7 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa3d4e RDI: ffffffff8c28ab60
RBP: ffffc90005f2f9b0 R08: ffffffff903098f7 R09: 1ffffffff206131e
R10: dffffc0000000000 R11: fffffbfff206131f R12: ffff8881b97e5fba
R13: ffff8881b97e5380 R14: ffff8881b97e70e0 R15: dffffc0000000000
 kvm_arch_vcpu_ioctl_run+0x11e6/0x20d0
 kvm_vcpu_ioctl+0xa62/0xfd0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb4fbb9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb4fcb22028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb4fbe16090 RCX: 00007fb4fbb9cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 00007fb4fbc32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb4fbe16128 R14: 00007fb4fbe16090 R15: 00007ffecda369a8
 </TASK>
CPU: 1 UID: 0 PID: 7732 Comm: syz.2.490 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 f3 bb ea f5 e8 7e ce 24 f6 fb bf 01 00 00 00 <e8> 13 a3 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 44 d0 24 f6 bf 01
RSP: 0018:ffffc90004a670c0 EFLAGS: 00000206
RAX: 0000000000130117 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8dfa3d4e RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff903098f7 R09: 1ffffffff206131e
R10: dffffc0000000000 R11: fffffbfff206131f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f29ac97d6c0(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000016ad49000 CR4: 0000000000352ef0
DR0: 0000000000007800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 irqentry_exit+0x14f/0x730
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:vmx_cache_reg+0x30c/0x5e0
Code: 42 0f b6 04 20 84 c0 0f 85 b2 01 00 00 41 80 3e 01 0f 85 f4 00 00 00 e8 42 77 6a 00 e9 c2 00 00 00 b8 1e 68 00 00 41 0f 78 c6 <0f> 86 77 02 00 00 e8 29 77 6a 00 48 81 c3 88 02 00 00 48 89 d8 48
RSP: 0018:ffffc90004a671e8 EFLAGS: 00000202
RAX: 000000000000681e RBX: ffff8881b52ed380 RCX: 0000000000000005
RDX: ffffffff815b3328 RSI: ffffffff8e73ad00 RDI: 0000000000000010
RBP: 0000000000000010 R08: ffff8881b995ca00 R09: 0000000000000006
R10: 0000000000000014 R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000100 R14: 000000000000003f R15: dffffc0000000000
 init_emulate_ctxt+0x2d8/0x680
 x86_emulate_instruction+0x636/0x2100
 kvm_mmu_page_fault+0x91a/0xb70
 vmx_handle_exit+0xd70/0x16f0
 vcpu_run+0x5c77/0x7860
 kvm_arch_vcpu_ioctl_run+0x11e6/0x20d0
 kvm_vcpu_ioctl+0xa62/0xfd0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f29abb9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f29ac97d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f29abe16090 RCX: 00007f29abb9cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000008
RBP: 00007f29abc32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f29abe16128 R14: 00007f29abe16090 R15: 00007ffed536bad8
 </TASK>
