rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (9281 ticks this GP) idle=a834/1/0x4000000000000000 softirq=27757/27759 fqs=5203
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1249050         15            0
rcu: 	cputime:     6737      45752           34   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=23601 q=7268 ncpus=2)
CPU: 0 UID: 0 PID: 8551 Comm: syz.3.699 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+0x221/0x350
Code: ff ff ff e8 41 e1 00 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 cb 3b 95 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d d8 8c 91
RSP: 0018:ffffc90000007750 EFLAGS: 00000286
RAX: 6c6f8c661157a300 RBX: 0000000000000000 RCX: 0000000000000302
RDX: 000000000d949ada RSI: ffffffff8e213879 RDI: ffffffff8c2897a0
RBP: ffffffff897c6870 R08: ffffffff897c6870 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8feeb198 R12: 0000000000000000
R13: ffffffff8feeb198 R14: 0000000000000001 R15: 0000000000000246
FS:  00007f0dcdfcd6c0(0000) GS:ffff88818dcb8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f696f04f270 CR3: 000000010f16c000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_lock_bh+0x36/0x50
 ___neigh_create+0xf00/0x22b0
 ip6_finish_output2+0x6d6/0x13c0
 ip6_output+0x337/0x540
 ndisc_send_skb+0xcb2/0x1650
 addrconf_rs_timer+0x2d2/0x6c0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x225/0x840
 __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:lock_acquire+0x221/0x350
Code: ff ff ff e8 41 e1 00 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 cb 3b 95 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d d8 8c 91
RSP: 0018:ffffc9000370fb20 EFLAGS: 00000282
RAX: 6c6f8c661157a300 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000063ebd2ae RSI: ffffffff8e213879 RDI: ffffffff8c2897a0
RBP: ffffffff81fb0a04 R08: ffffffff81fb0a04 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888105be50b0 R12: 0000000000000000
R13: ffff888105be50b0 R14: 0000000000000001 R15: 0000000000000246
 __mutex_lock+0x19d/0x1590
 __se_sys_perf_event_open+0x1984/0x1d40
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0dcfd9ce59
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:00007f0dcdfcd028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f0dd0016090 RCX: 00007f0dcfd9ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f0dcfe32e6f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0dd0016128 R14: 00007f0dd0016090 R15: 00007fff899826f8
 </TASK>
sched: DL replenish lagged too much
