rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=1a34/1/0x4000000000000000 softirq=102282/102282 fqs=0
rcu: 	(detected by 0, t=24535 jiffies, g=76369, q=213 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14212 Comm: syz.1.2710 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:vmx_vmexit+0x0/0xd0
Code: 0f 1f 84 00 00 00 00 00 f7 44 24 08 01 00 00 00 74 08 0f 01 c3 e9 cf 00 00 00 0f 01 c2 e9 c7 00 00 00 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 50 48 8b 44 24 08 8f 00 48 89 48 08 48 89 50 10 48 89
RSP: 0018:ffffc900097bf470 EFLAGS: 00000002
RAX: 0000000000419000 RBX: 00000000756e6547 RCX: 000000006c65746e
RDX: 0000000049656e69 RSI: 0000000000000000 RDI: 0000000000050000
RBP: 0000000000000606 R08: 0000000000050000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f187e8906c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001ac03d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 24534 jiffies! g76369 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=16724
rcu: rcu_preempt kthread starved for 24535 jiffies! g76369 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:27536 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 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:
CPU: 0 UID: 0 PID: 14211 Comm: syz.2.2709 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:asm_fred_entry_from_kvm+0x58/0x60
Code: 41 54 41 55 41 56 41 57 31 f6 31 d2 31 c9 45 31 c0 45 31 c9 45 31 d2 45 31 db 48 89 e7 e8 50 05 00 00 66 90 48 89 ec 0f 1f 00 <5d> e9 d2 66 03 00 cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900058b7350 EFLAGS: 00000086 ORIG_RAX: 0000000000000000
RAX: ffffffff8ba851c8 RBX: fffff52000b16e70 RCX: ffff88816fc8a500
RDX: ffff888107f40c3a RSI: 0000000080000000 RDI: 020000ec00000018
RBP: ffffc900058b7350 R08: ffff88816fc8a500 R09: 0000000000000003
R10: 0000000000000029 R11: 0000000000000000 R12: 1ffff11020fe8187
R13: dffffc0000000000 R14: ffff888107f40000 R15: 000000ec00000000
FS:  00007fe56518c6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000016b75a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 vmx_handle_exit_irqoff+0x4af/0xa00
 vcpu_run+0x5979/0x7860
 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: 0033:0x7fe56439cdd9
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:00007fe56518c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe564615fa0 RCX: 00007fe56439cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000c
RBP: 00007fe564432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe564616038 R14: 00007fe564615fa0 R15: 00007ffef5546658
 </TASK>
