rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10506 jiffies, g=102573, q=154 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10506 (4295014930-4295004424), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g102573 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=33997
rcu: rcu_preempt kthread starved for 10506 jiffies! g102573 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:27160 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 20937 Comm: syz.1.3923 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:lock_acquire+0xe7/0x360
Code: 00 00 48 c7 44 24 30 00 00 00 00 9c 8f 44 24 30 4c 89 74 24 10 4d 89 fe 4c 8b 7c 24 30 fa 48 c7 c7 1f e3 9c 8d e8 69 12 dd 09 <65> ff 05 12 a0 03 11 45 31 c9 4c 89 7c 24 08 41 f7 c7 00 02 00 00
RSP: 0018:ffffc900000077e0 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 4231622da0aa3000
RDX: 0000000000000000 RSI: ffffffff8d9ce31f RDI: ffffffff8be33e00
RBP: ffffffff81ada78b R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1009604f51 R12: 0000000000000000
R13: ffff88804b027a98 R14: 0000000000000001 R15: 0000000000000046
FS:  00007f38065a06c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000111cf2000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000082
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _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:obj_cgroup_charge_account+0x333/0x660
Code: 8b 74 24 20 e8 ee 36 72 ff 48 c7 c0 60 e6 a3 8f 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 35 02 00 00 83 3d cf 9c 78 0d 00 74 23 <4c> 8d 6b 30 4c 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 54 02
RSP: 0018:ffffc900079f7c18 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88804b03b500 RCX: 4231622da0aa3000
RDX: 0000000000000000 RSI: ffffffff8dba9eed RDI: ffffffff8be33e00
RBP: ffff88804b03b528 R08: 0000000000000000 R09: ffffffff822b479b
R10: 0000000000000406 R11: 0000000000000002 R12: 0000000000000005
R13: ffff888020a40000 R14: dffffc0000000000 R15: 0000000000000608
 __memcg_slab_post_alloc_hook+0x3e6/0x7f0
 kmem_cache_alloc_lru_noprof+0x2c7/0x3d0
 sock_alloc_inode+0x28/0xc0
 alloc_inode+0x6a/0x1b0
 __sock_create+0x12d/0x9f0
 __sys_socketpair+0x1c5/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f380578eba9
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:00007f38065a0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f38059d6090 RCX: 00007f380578eba9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001
RBP: 00007f3805811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f38059d6128 R14: 00007f38059d6090 R15: 00007ffc6840ce68
 </TASK>
