rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=18181, q=144 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294962019-4294951517), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g18181 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=8675
rcu: rcu_preempt kthread starved for 10502 jiffies! g18181 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:26856 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 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: 7711 Comm: syz.5.459 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:check_preemption_disabled+0x6/0x120
Code: c7 c6 60 44 e3 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 <48> 83 ec 10 65 48 8b 05 be be 25 07 48 89 44 24 08 65 8b 05 c6 be
RSP: 0018:ffffc900001e07b8 EFLAGS: 00000092
RAX: 0000000000000001 RBX: 0000000000000000 RCX: cb7d294da653c700
RDX: 0000000000000000 RSI: ffffffff8dbaa624 RDI: ffffffff8be34480
RBP: ffffffff81adabcb R08: 0000000000000000 R09: ffffffff81adabcb
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: 0000000000000000
R13: ffff888136627a98 R14: 0000000000000001 R15: 0000000000000046
FS:  00007fb35d1e96c0(0000) GS:ffff8881a3c11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb35d1e8fc8 CR3: 00000001088c8000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x130/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:plist_del+0x4/0x3f0
Code: 03 38 c1 0f 8c b8 fd ff ff 4c 89 f7 e8 25 ec ad f6 e9 ab fd ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 28 48 89 f3 49 89 fe 49 bc
RSP: 0018:ffffc90006427b68 EFLAGS: 00000246
RAX: ffffffff81b31ccf RBX: ffffc90006057aa0 RCX: 0000000000080000
RDX: ffffc90028cd1000 RSI: ffff888030e40108 RDI: ffffc90006057aa0
RBP: 0000000000000001 R08: ffff88811fd1002b R09: 1ffff11023fa2005
R10: dffffc0000000000 R11: ffffed1023fa2006 R12: dffffc0000000000
R13: ffffc90006057ad0 R14: ffff888030e400c0 R15: ffff888030e400c8
 __futex_unqueue+0xf0/0x160
 futex_wake_mark+0xe2/0x200
 futex_wake+0x3bb/0x560
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb35c38ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb35d1e90e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fb35c5d5fa8 RCX: 00007fb35c38ec29
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb35c5d5fac
RBP: 00007fb35c5d5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb35c5d6038 R14: 00007ffd302b66d0 R15: 00007ffd302b67b8
 </TASK>
