rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10501 ticks this GP) idle=5584/1/0x4000000000000000 softirq=38375/38640 fqs=5236
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1201885        768            0
rcu: 	cputime:    32542      19949           43   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=31829 q=11624 ncpus=2)
CPU: 0 UID: 0 PID: 10637 Comm: syz.5.1269 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:stack_trace_consume_entry+0x5/0x280
Code: f0 5b 41 5e 5d c3 cc cc cc cc cc e8 c5 b5 ce 09 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 18 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000007418 EFLAGS: 00000286
RAX: ffffffff81ad3aaa RBX: ffffc900000074e0 RCX: ce04f08b96904400
RDX: 0000000000000001 RSI: ffffffff81ad3aaa RDI: ffffc900000074e0
RBP: ffffc900000074b0 R08: ffffc90000007c90 R09: 0000000000000000
R10: ffffc90000007478 R11: ffffffff81ac5140 R12: ffff8880204dd640
R13: ffff888111a78f00 R14: ffffffff81ac5140 R15: ffffc90000007428
FS:  00007f7d6eba76c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb017e840a0 CR3: 00000000281c6000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x110/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 dst_alloc+0x105/0x170
 icmp6_dst_alloc+0x75/0x420
 ndisc_send_skb+0x41f/0x1440
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:free_percpu+0x5e/0xf50
Code: 18 48 29 c5 48 03 2d 31 92 b9 0b 4c 8b 3d 8a 92 b9 0b 4d 85 ff 74 67 49 8d bf 80 00 00 00 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 05 e8 0b 45 1f 00 4d 8b b7 80 00 00 00 49 8d 9f a4 00 00 00 48
RSP: 0018:ffffc9000356f550 EFLAGS: 00000246
RAX: 1ffff11027ffc448 RBX: ffff8880289b0ac0 RCX: 0000000000080000
RDX: ffffc90023c7b000 RSI: 0000000000000ee9 RDI: ffff88813ffe2240
RBP: ffffe8ff146231f0 R08: ffffffff8dfdd66f R09: 1ffffffff1bfbacd
R10: dffffc0000000000 R11: fffffbfff1bfbace R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880289b0b88 R15: ffff88813ffe21c0
 __mmdrop+0x2f4/0x570
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 perf_trace_init+0x50/0x2d0
 perf_tp_event_init+0x8d/0x120
 perf_try_init_event+0x17f/0x870
 perf_event_alloc+0x133e/0x2be0
 __se_sys_perf_event_open+0x772/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d6dd8ec29
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:00007f7d6eba7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f7d6dfd5fa0 RCX: 00007f7d6dd8ec29
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007f7d6de11e41 R08: 000000000000000a R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d6dfd6038 R14: 00007f7d6dfd5fa0 R15: 00007fff1b719108
 </TASK>
sched: DL replenish lagged too much
