rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=82241, q=404 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294986689-4294976187), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g82241 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=25596
rcu: rcu_preempt kthread starved for 10502 jiffies! g82241 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->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:R stack:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_timeout+0x152/0x2c0
 rcu_gp_fqs_loop+0x30c/0x11f0
 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: 17098 Comm: syz.9.4581 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:lock_is_held_type+0x110/0x150
Code: c1 05 b4 ec 9c 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> cc cc cc cc cc 90 0f 0b 90 48 c7 c7 39 64 22 8e e8 aa 1a 00 00
RSP: 0018:ffffc90000a08d08 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000010003
RDX: ffff888171770000 RSI: ffffffff8e4aacbf RDI: ffffffff8c4bc280
RBP: ffff8881b36d0300 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000141190 R12: 0000000000000001
R13: ffff8881b36d0000 R14: dffffc0000000000 R15: ffff8881bdfce800
FS:  000055558f4bf500(0000) GS:ffff8882a8f5d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d9ebff8 CR3: 00000001b483e000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 advance_sched+0x1d9/0xc80
 __hrtimer_run_queues+0x3bc/0xa10
 hrtimer_interrupt+0x448/0x910
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:set_shrinker_bit+0x1b0/0x350
Code: 1f e8 14 8d 9a ff 89 c5 31 ff 89 c6 e8 b9 a5 b6 ff 85 ed 0f 84 d4 00 00 00 e8 6c a1 b6 ff eb 05 e8 65 a1 b6 ff 4d 8d 7c 24 10 <4c> 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 60 01 00 00 41 8b
RSP: 0018:ffffc9000a24fc28 EFLAGS: 00000293
RAX: ffffffff82104674 RBX: ffffffff8210454c RCX: ffff888171770000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8210454c R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c20 R12: ffff8881132fef40
R13: dffffc0000000000 R14: 0000000000000034 R15: ffff8881132fef50
 list_lru_add+0x1f2/0x290
 list_lru_add_obj+0x191/0x270
 d_lru_add+0xd8/0x1a0
 fast_dput+0x544/0x670
 dput+0x30/0x60
 __fput+0x675/0xa50
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0x1fa/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe26359e0d9
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:00007ffff84e4998 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fe263827da0 RCX: 00007fe26359e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fe263827da0 R08: 00007fe263826038 R09: 0000000000000000
R10: 00000000005c6f8c R11: 0000000000000246 R12: 000000000005f8ab
R13: 00007fe26382618c R14: 00000000000606de R15: 00007fe263826180
 </TASK>
