rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (717 ticks this GP) idle=ce54/1/0x4000000000000000 softirq=24856/24856 fqs=4950
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   166780          2            0
rcu: 	cputime:     1144       6014            4   ==> 7160(ms)
rcu: 	(t=10500 jiffies g=17517 q=4571 ncpus=2)
CPU: 1 UID: 0 PID: 6836 Comm: syz.4.255 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:unwind_next_frame+0x1991/0x2550
Code: c0 0f 85 91 0a 00 00 48 89 f8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 aa 0a 00 00 49 0f bf 04 24 48 01 c6 4c 89 f7 48 89 da eb 3f <48> 8d 5f 02 48 83 c7 03 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc90000a08418 EFLAGS: 00000246
RAX: ffffffff90c516e2 RBX: ffffc90000a08598 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90c516de
RBP: dffffc0000000000 R08: ffffc90000a085a7 R09: 0000000000000000
R10: ffffc90000a08598 R11: fffff520001410b5 R12: ffffc90000a08548
R13: 1ffff920001410ab R14: ffffc90000a08548 R15: 1ffffffff218a2dc
FS:  00007f77781c76c0(0000) GS:ffff8882a9288000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e563fff CR3: 00000001b8808000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __unwind_start+0x5b8/0x760
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x182/0x650
 __netif_receive_skb_core+0x2c10/0x3170
 process_backlog+0x76d/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 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+0x427/0xbe0
Code: 41 c7 84 24 e0 0d 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 d6 fe 16 0a e8 61 f7 38 00 fb 49 8d bd b0 16 00 00 <48> 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 7b 03 00 00 41 80
RSP: 0018:ffffc9000428f710 EFLAGS: 00000206
RAX: 0000000000000205 RBX: 1ffff110478c7784 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfab075 RDI: ffff8881a12a16b0
RBP: ffffc9000428f770 R08: ffffffff9030bef7 R09: 1ffffffff20617de
R10: dffffc0000000000 R11: fffffbfff20617df R12: ffff88823c63ae88
R13: ffff8881a12a0000 R14: ffff888102eabb00 R15: dffffc0000000000
 __schedule+0x1829/0x5740
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x760
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_common+0x18/0xd0
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 49 bf 00 00 00 00 00 fc ff df eb 0d 48 f7 03 10 00 00 00 <0f> 84 99 00 00 00 65 ff 05 db f7 8e 07 65 8b 05 d4 f7 8e 07 25 ff
RSP: 0018:ffffc9000428fac8 EFLAGS: 00000202
RAX: 1ffff11034254000 RBX: ffff8881a12a0000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8c28b6c0 RDI: ffffffff8c28b680
RBP: ffffc9000428fb30 R08: ffffffff9030bef7 R09: 1ffffffff20617de
R10: dffffc0000000000 R11: fffffbfff20617df R12: ffff8881a12a14d0
R13: 0000000000000000 R14: ffff8881a12a1570 R15: dffffc0000000000
 preempt_schedule_thunk+0x16/0x30
 __mutex_lock+0x32d/0x1550
 __se_sys_perf_event_open+0x1980/0x1d40
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f777739cdd9
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:00007f77781c7028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f7777615fa0 RCX: 00007f777739cdd9
RDX: ffff7fffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f7777432d69 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7777616038 R14: 00007f7777615fa0 R15: 00007ffddac59678
 </TASK>
