rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=458c/1/0x4000000000000000 softirq=74314/74316 fqs=5237
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1160702          0            0
rcu: 	cputime:    31044      21455           85   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=57553 q=3347 ncpus=2)
CPU: 1 UID: 0 PID: 15724 Comm: syz.5.2546 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:ip6t_do_table+0x74f/0x1560
Code: 00 48 8b 4c 24 60 48 89 c8 48 c1 e8 03 42 80 3c 28 00 74 0f 48 8b 7c 24 60 e8 ad 75 c5 f7 48 8b 4c 24 60 49 8d 5e 50 4c 8b 39 <48> 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 8b 75 c5 f7
RSP: 0018:ffffc90000a08780 EFLAGS: 00000246
RAX: 1ffff11021cac824 RBX: ffff8881156a3960 RCX: ffff88810e564120
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a08980 R08: ffffc90000a088ef R09: 0000000000000000
R10: ffffc90000a088d0 R11: fffff5200014111e R12: ffff8881156a3978
R13: dffffc0000000000 R14: ffff8881156a3910 R15: 000000306e616c77
FS:  00007f18989f66c0(0000) GS:ffff8882a9463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5fe9783d58 CR3: 000000011ee3e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 nf_hook_slow+0xc5/0x220
 ndisc_send_skb+0x1506/0x1670
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 63 c5 e4 f5 e8 1e 60 1e f6 fb bf 01 00 00 00 <e8> c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 f4 61 1e f6 bf 01
RSP: 0018:ffffc900029379c0 EFLAGS: 00000206
RAX: 0000000000026dd1 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8def4b7d RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff90118bb7 R09: 1ffffffff2023176
R10: dffffc0000000000 R11: fffffbfff2023177 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__mutex_unlock_slowpath+0x1ca/0x7d0
Code: 74 24 20 4c 89 f7 be 08 00 00 00 e8 60 91 80 f6 48 89 df be 08 00 00 00 e8 53 91 80 f6 48 8b 84 24 a0 00 00 00 f0 4d 0f b1 2e <0f> 84 57 01 00 00 49 bd 00 00 00 00 00 fc ff df 4c 89 fa 4c 8b 74
RSP: 0018:ffffc90002937ae0 EFLAGS: 00000246
RAX: ffff88811e61ba80 RBX: ffffc90002937b80 RCX: ffffffff8baf5a9d
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90002937b80
RBP: ffffc90002937bf0 R08: ffffc90002937b87 R09: 1ffff92000526f70
R10: dffffc0000000000 R11: fffff52000526f71 R12: 1ffff92000526f64
R13: 0000000000000000 R14: ffff888177074840 R15: 1ffffffff20237d8
 perf_ioctl+0x18e/0x20c0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f189a79c799
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:00007f18989f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f189aa16090 RCX: 00007f189a79c799
RDX: 0000000000000009 RSI: 0000000040042408 RDI: 0000000000000008
RBP: 00007f189a832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f189aa16128 R14: 00007f189aa16090 R15: 00007fff143b1dc8
 </TASK>
sched: DL replenish lagged too much
