rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=894c/1/0x4000000000000000 softirq=38394/38394 fqs=5247
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1044645          0            0
rcu: 	cputime:    32303      20195           90   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=30769 q=12933 ncpus=2)
CPU: 0 UID: 0 PID: 11571 Comm: syz.6.1681 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:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 5a 4b f0 f5 48 89 df e8 92 c0 f0 f5 e8 4d 1a 1c f6 fb bf 01 00 00 00 <e8> 72 7d e2 f5 65 8b 05 9b ef 6a 07 85 c0 74 07 5b e9 01 48 00 00
RSP: 0018:ffffc90000007d90 EFLAGS: 00000212
RAX: 0000000000241570 RBX: ffff888121026100 RCX: 0000000000000102
RDX: 0000000000000000 RSI: ffffffff8def914b RDI: 0000000000000001
RBP: ffffc90000007f08 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: ffff888121026100
R13: 1ffff92000000fcc R14: ffffc90000ae7a40 R15: ffffc90000007e60
FS:  00007f71f54076c0(0000) GS:ffff88818de5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f71f53e5ff8 CR3: 0000000115e76000 CR4: 00000000000006f0
DR0: 00000000000000d4 DR1: 00000000000000d4 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __run_timer_base+0x642/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x245/0x920
Code: 00 00 48 85 db 0f 85 e8 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 49 83 c4 48 4c 89 e7 e8 d5 65 1c 0a e8 30 81 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 80 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90003a97918 EFLAGS: 00000202
RAX: 0000000000000043 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8def914b RDI: ffffffff8c27ca00
RBP: ffffc90003a97970 R08: ffffffff9011b4b7 R09: 1ffffffff2023696
R10: dffffc0000000000 R11: fffffbfff2023697 R12: ffff888178198000
R13: dffffc0000000000 R14: ffff888176cbd7c0 R15: ffff88812103b998
 __schedule+0x15e5/0x52d0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__get_user_4+0x16/0x20
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 ba 00 f0 ff ff ff 7f 00 00 48 39 d0 48 0f 47 c2 0f 1f 00 8b 10 <31> c0 0f 1f 00 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003a97ca0 EFLAGS: 00000287
RAX: 0000200000000384 RBX: ffffc90003a97da0 RCX: 0000000000000046
RDX: 0000000000000080 RSI: ffffffff8e169f12 RDI: ffffffff8c27ca00
RBP: ffffc90003a97ee0 R08: ffffffff821672bf R09: ffff88810009d900
R10: ffffc90003a97da0 R11: fffff52000752fc6 R12: 1ffff92000752fb0
R13: 0000200000000384 R14: ffffc90003a97da0 R15: 0000200000000380
 perf_copy_attr+0x45/0x880
 __se_sys_perf_event_open+0x107/0x1d60
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71f459c819
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:00007f71f5407028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f71f4816090 RCX: 00007f71f459c819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000380
RBP: 00007f71f4632c91 R08: 0000000000000003 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f71f4816128 R14: 00007f71f4816090 R15: 00007ffda20a2338
 </TASK>
