rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10406 ticks this GP) idle=7acc/1/0x4000000000000000 softirq=12793/12793 fqs=5165
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1257117          0            0
rcu: 	cputime:     8043      44436           36   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10365 q=6234 ncpus=2)
CPU: 0 UID: 0 PID: 5745 Comm: syz.1.7 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:strlen+0x3f/0x70
Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 19 85
RSP: 0018:ffffc90000007438 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffffff8bcdfb01 RCX: 0000000000000000
RDX: ffffffff8176e256 RSI: ffffffff8e95cd60 RDI: ffffffff8bcdfb00
RBP: ffffc90000007560 R08: ffffc90000007707 R09: 0000000000000000
R10: ffffc900000076f8 R11: fffff52000000ee1 R12: dffffc0000000000
R13: ffffffff8176e256 R14: dffffc0000000000 R15: ffffffffffffffff
FS:  00007f3ef91f86c0(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5d24dc3000 CR3: 000000010912c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 perf_trace_lock+0xd5/0x410
 lock_release+0x38e/0x3c0
 unwind_next_frame+0x1bba/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x384/0x690
 __alloc_skb+0x1d0/0x7d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 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 c6 7a 15 0a e8 41 eb 38 00 fb 49 8d bd a8 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:ffffc90005b0f950 EFLAGS: 00000206
RAX: 00000000000169b7 RBX: 1ffff11024207784 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa3a1a RDI: ffff88816bac51a8
RBP: ffffc90005b0f9b0 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: ffff88812103ae88
R13: ffff88816bac3b00 R14: ffff8881b95f3b00 R15: dffffc0000000000
 __schedule+0x17bc/0x5680
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x730
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__se_sys_perf_event_open+0x1905/0x1d40
Code: fc ff df 0f b6 04 08 84 c0 0f 85 22 03 00 00 48 8b 74 24 18 8b 96 0c 03 00 00 4c 8b 7c 24 30 4c 89 ff e8 1e 4b 00 00 4c 89 ff <e8> a6 f6 fe ff 48 8b 7c 24 68 e8 fc a7 ad 09 80 7c 24 38 00 74 07
RSP: 0018:ffffc90005b0fd00 EFLAGS: 00000246
RAX: 36d3d44c77571700 RBX: ffff88816bac3b00 RCX: 0000000000080000
RDX: ffffc900089f1000 RSI: 0000000000000d4a RDI: ffff888176724800
RBP: ffffc90005b0fee0 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 1ffff92000b61fb0
R13: ffff8881b9e12b88 R14: ffff8881b9e12dd0 R15: ffff888176724800
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3ef839cdd9
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:00007f3ef91f8028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3ef8615fa0 RCX: 00007f3ef839cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f3ef8432d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3ef8616038 R14: 00007f3ef8615fa0 R15: 00007ffcbce07e48
 </TASK>
sched: DL replenish lagged too much
