rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=100717, q=202 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295008463-4294997961), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g100717 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=38717
rcu: rcu_preempt kthread starved for 10502 jiffies! g100717 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->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 stack:27536 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: 22377 Comm: syz.0.6923 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:_raw_spin_lock_irqsave+0x3b/0x60
Code: 00 00 74 05 e8 c6 01 23 f6 bf 01 00 00 00 e8 3c f5 e8 f5 49 8d 7e 18 31 f6 31 d2 31 c9 41 b8 01 00 00 00 45 31 c9 ff 74 24 10 <e8> 60 ce f6 f5 48 83 c4 08 4c 89 f7 e8 a4 6f f7 f5 48 89 d8 5b 41
RSP: 0018:ffffc90000007d60 EFLAGS: 00000046
RAX: 0000000000010003 RBX: 0000000000000082 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9a6d8080
RBP: ffff8880126e8300 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8880126e8308 R11: ffffed10024dd063 R12: ffff888121028280
R13: ffffffff9a6d8060 R14: ffffffff9a6d8068 R15: ffff8880126e8300
FS:  00007fbe022046c0(0000) GS:ffff88818dc91000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe0144f0d1 CR3: 00000001735b2000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 debug_object_deactivate+0x6c/0x3a0
 __hrtimer_run_queues+0x23a/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 dd 72 f7 f5 f7 c3 00 02 00 00 74 05 e8 40 fe 22 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 24 f5 e8 f5 65 8b 05 ad 1e 8e 07 85 c0 74 18 5b 41 5e e9 51 48
RSP: 0018:ffffc90006777aa8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfa884e RDI: 0000000000000001
RBP: ffffc90006777bd0 R08: ffffffff9030b2f7 R09: 1ffffffff206165e
R10: dffffc0000000000 R11: fffffbfff206165f R12: ffffc90006777c90
R13: 0000000000000005 R14: ffffffff9a489858 R15: 1ffff92000ceef64
 __do_adjtimex+0xb46/0xe70
 do_adjtimex+0xd1/0x370
 __x64_sys_clock_adjtime+0x252/0x340
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe0139cdd9
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:00007fbe02204028 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fbe01615fa0 RCX: 00007fbe0139cdd9
RDX: 0000000000000000 RSI: 0000200000001100 RDI: 0000000000000000
RBP: 00007fbe01432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe01616038 R14: 00007fbe01615fa0 R15: 00007ffd6470da28
 </TASK>
