rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10464 ticks this GP) idle=8fac/1/0x4000000000000000 softirq=26072/26351 fqs=5231
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1224653        876            0
rcu: 	cputime:    30620      21875           40   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=20741 q=12175 ncpus=2)
CPU: 1 UID: 0 PID: 8284 Comm: syz.5.659 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:rcu_read_unlock_special+0x87/0x4b0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 92 9e f9 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001e02e0 EFLAGS: 00000206
RAX: dc7fed8c955c3900 RBX: 1ffff9200003c060 RCX: dc7fed8c955c3900
RDX: 0000000000000002 RSI: ffffffff8d9ba163 RDI: ffffffff8be33e00
RBP: ffffc900001e03b8 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: ffffffff8e13f400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fae466736c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60d8ba74b8 CR3: 00000001166de000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 ndisc_send_skb+0xeb6/0x1440
 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:lock_is_held_type+0x137/0x190
Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 f9 73 26 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc9000451f938 EFLAGS: 00000206
RAX: dc7fed8c955c3900 RBX: 0000000000000000 RCX: dc7fed8c955c3900
RDX: 0000000000000000 RSI: ffffffff8dba9835 RDI: ffffffff8be33e00
RBP: 00000000ffffffff R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: 0000000000000246
R13: ffff88801ff6d640 R14: ffffffff8e13a220 R15: 1ffff11026cc7551
 __schedule+0x290/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__se_sys_perf_event_open+0x104/0x1d70
Code: 4b 02 00 41 89 c5 31 ff 89 c6 e8 47 06 d0 ff 45 85 ed 74 6b e8 fd 01 d0 ff 49 63 c5 eb 0c e8 f3 01 d0 ff 48 c7 c0 ea ff ff ff <48> c7 84 24 80 00 00 00 0e 36 e0 45 41 c7 04 1f 00 00 00 00 49 c7
RSP: 0018:ffffc9000451fd00 EFLAGS: 00000206
RAX: 0000000000000004 RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff99b146a0
RBP: ffffc9000451fee0 R08: 0000000000000000 R09: ffffffff823c8587
R10: dffffc0000000000 R11: fffff520008a3f91 R12: ffff888120fe95d0
R13: ffff888120feaed0 R14: 0000000000000000 R15: 1ffff920008a3fb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae4578eba9
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:00007fae46673038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fae459d5fa0 RCX: 00007fae4578eba9
RDX: 7fffffffffffffff RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007fae45811e19 R08: 0000000000000003 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fae459d6038 R14: 00007fae459d5fa0 R15: 00007ffdd2f55498
 </TASK>
sched: DL replenish lagged too much
