rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10503 jiffies, g=7225, q=1074 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10497 (4294953737-4294943240), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10496 jiffies! g7225 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=3509
rcu: rcu_preempt kthread starved for 10497 jiffies! g7225 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: 5966 Comm: syz.0.19 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:do_raw_spin_lock+0x56/0x290
Code: 49 bf 00 00 00 00 00 fc ff df 48 c7 44 24 20 b3 8a b5 41 48 c7 44 24 28 e9 45 b0 8d 48 c7 44 24 30 90 13 9e 81 48 8d 4c 24 20 <48> c1 e9 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 48 89 4c 24 18 4a 89 04
RSP: 0018:ffffc900000077c0 EFLAGS: 00000086
RAX: 2ff39341be0f5c00 RBX: ffff88804b027a80 RCX: ffffc900000077e0
RDX: 0000000000000000 RSI: ffffffff8dbaa0c3 RDI: ffff88804b027a80
RBP: ffffc90000007870 R08: 0000000000000000 R09: ffffffff81ada78b
R10: dffffc0000000000 R11: ffffed1009604f51 R12: dffffc0000000000
R13: ffff88804b027b00 R14: 0000000000000802 R15: dffffc0000000000
FS:  00007fe5bd2ad6c0(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31f21ff8 CR3: 0000000022ea6000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0xb3/0xf0
 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:aa_get_newest_label+0x33/0x200
Code: 89 fb e8 e0 c4 3a fd 48 85 db 0f 84 8a 00 00 00 49 bf 00 00 00 00 00 fc ff df 4c 8d 73 40 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 43 b7 9e fd 4d 8b 36 4c 89 f6 48 81 e6 00 08 00
RSP: 0018:ffffc900039ffa70 EFLAGS: 00000246
RAX: 1ffff11020002427 RBX: ffff8881000120f8 RCX: 0000000000080000
RDX: ffffc90007e09000 RSI: 000000000000004a RDI: 000000000000004b
RBP: 0000000000000027 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646
R10: dffffc0000000000 R11: fffffbfff1f47647 R12: ffff888108ad0b80
R13: dffffc0000000000 R14: ffff888100012138 R15: dffffc0000000000
 apparmor_capable+0x86/0x1b0
 security_capable+0x107/0x2e0
 ns_capable+0x6f/0xf0
 bpf_token_capable+0x5b/0xe0
 bpf_prog_load+0x35c/0x1930
 __sys_bpf+0x4ff/0x850
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5bc38ec29
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:00007fe5bd2ad038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fe5bc5d5fa0 RCX: 00007fe5bc38ec29
RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007fe5bc411e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe5bc5d6038 R14: 00007fe5bc5d5fa0 R15: 00007ffe7f219318
 </TASK>
