rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=830c/1/0x4000000000000000 softirq=49037/49037 fqs=0
rcu: 	(detected by 0, t=29982 jiffies, g=32733, q=202 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9057 Comm: syz.1.997 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_do_nmi_irqoff+0x13/0x20
Code: ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 83 e4 f0 6a 18 55 9c 6a 10 e8 ad a3 57 f5 <c9> c3 cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000a43f4a0 EFLAGS: 00000086
RAX: 0000000080000200 RBX: ffff8880242dd380 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880242dd380
RBP: ffffc9000a43f4a0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880242dd380
R13: dffffc0000000000 R14: ffffffff815d279c R15: ffff8880242df3c8
FS:  00007f9db7fed6c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001bc180000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 vmx_handle_nmi+0xe1/0xf0
 vmx_vcpu_enter_exit+0x11a/0x1f0
 vmx_vcpu_run+0xf9c/0x2d10
 vcpu_run+0x533d/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: 0033:0x7f9db719cdd9
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:00007f9db7fed028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9db7415fa0 RCX: 00007f9db719cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f9db7232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9db7416038 R14: 00007f9db7415fa0 R15: 00007ffd207e8218
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 29981 jiffies! g32733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=6822
rcu: rcu_preempt kthread starved for 29982 jiffies! g32733 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:27544 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: 9056 Comm: syz.2.996 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:handle_softirqs+0x160/0x840
Code: 89 6c 24 20 0f b7 db 48 c7 c7 20 1d cb 8b e8 37 01 21 0a 65 66 c7 05 d5 4f b1 11 00 00 e8 c8 0c 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: 000000000042feb6 RBX: 0000000000000008 RCX: 0000000080000100
RDX: 0000000000000003 RSI: ffffffff8dfa6837 RDI: ffffffff8c28af60
RBP: ffffffff8e60a0c0 R08: ffffffff9030b6f7 R09: 1ffffffff20616de
R10: dffffc0000000000 R11: fffffbfff20616df R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881117d4a00 R15: dffffc0000000000
FS:  00007fce2f52a6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010da6c000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 common_interrupt+0xbb/0xe0
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40
RIP: 0010:vmx_write_tsc_offset+0x3e/0x80
Code: 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 9d 1b d6 00 48 8b 1b b8 10 20 00 00 0f 79 c3 <76> 17 e8 eb dd 6a 00 5b c3 cc cc cc cc cc e8 df dd 6a 00 5b e9 29
RSP: 0018:ffffc900035ff1d0 EFLAGS: 00000202
RAX: 0000000000002010 RBX: 0000901607c68710 RCX: dffffc0000000000
RDX: ffffc90020803000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900035ff290 R08: ffffffff9030b6f7 R09: 1ffffffff20616de
R10: dffffc0000000000 R11: fffffbfff20616df R12: 0000901607c68710
R13: dffffc0000000000 R14: 1ffff920006bfe40 R15: 0000000000000000
 kvm_vcpu_write_tsc_offset+0x2da/0x500
 kvm_set_msr_common+0x297b/0x4350
 vmx_set_msr+0x15cc/0x2810
 __kvm_set_msr+0x616/0xab0
 kvm_set_msr_ignored_check+0x2a/0x390
 __kvm_emulate_wrmsr+0x4e/0x400
 vmx_handle_exit+0x100c/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: 0033:0x7fce2e59cdd9
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:00007fce2f52a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fce2e815fa0 RCX: 00007fce2e59cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000b
RBP: 00007fce2e632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fce2e816038 R14: 00007fce2e815fa0 R15: 00007fff063df408
 </TASK>
