rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 ticks this GP) idle=ff2c/1/0x4000000000000000 softirq=18415/18415 fqs=0
rcu: 	(t=29941 jiffies g=14677 q=4 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 29940 jiffies! g14677 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3233
rcu: rcu_preempt kthread starved for 29941 jiffies! g14677 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6242 Comm: syz.1.129 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:ffffc90006437470 EFLAGS: 00000002
RAX: 0000000000411000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 000000000000001e RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000001 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000017f120
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f53510296c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010d0a2000 CR4: 0000000000352ef0
DR0: 000000000000000a DR1: 00000000ffffffff DR2: 000000000000f553
DR3: 0000000000000062 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 </TASK>
CPU: 0 UID: 0 PID: 6247 Comm: syz.0.130 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: 00000212
RAX: 000000000039c4e0 RBX: 0000000000000008 RCX: 0000000080000101
RDX: 0000000000000002 RSI: ffffffff8dfa6837 RDI: ffffffff8c28af60
RBP: ffffffff8e60a0c0 R08: ffffffff9030b6f7 R09: 1ffffffff20616de
R10: dffffc0000000000 R11: fffffbfff20616df R12: 0000000000000000
R13: 0000000000000000 R14: ffff88810aa84a00 R15: dffffc0000000000
FS:  00007f9e189c26c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001bca02000 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: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 02 eb 85 00 fb 4c 89 f0 <48> c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b fd e8 00 49 ff 06
RSP: 0018:ffffc900039e75e0 EFLAGS: 00000206
RAX: ffff88801df81d60 RBX: 1ffff11003bf0187 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa6837 RDI: ffffffff8c28af60
RBP: ffffc900039e79b0 R08: ffffffff9030b6f7 R09: 1ffffffff20616de
R10: dffffc0000000000 R11: fffffbfff20616df R12: ffff88801df80c3a
R13: ffff88801df80000 R14: ffff88801df81d60 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: 0033:0x7f9e17b9cdd9
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:00007f9e189c2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e17e15fa0 RCX: 00007f9e17b9cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f9e17c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9e17e16038 R14: 00007f9e17e15fa0 R15: 00007ffde2bca6a8
 </TASK>
