clocksource: Long readout interval, skipping watchdog check: cs_nsec: 95175043037 wd_nsec: 95175045186
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10305 ticks this GP) idle=6424/1/0x4000000000000000 softirq=21586/21588 fqs=5007
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   800604          4            0
rcu: 	cputime:    19004      33485           60   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=12601 q=2498 ncpus=2)
CPU: 0 UID: 0 PID: 7279 Comm: syz.2.366 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 12 72 c7 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:ffffc90000007920 EFLAGS: 00000206
RAX: 0d112c6a1520fd00 RBX: 1ffff92000000f28 RCX: 0d112c6a1520fd00
RDX: 0000000000000002 RSI: ffffffff8d70f0cc RDI: ffffffff8bbf0e60
RBP: ffffc900000079f0 R08: ffffffff8f7cee77 R09: 1ffffffff1ef9dce
R10: dffffc0000000000 R11: fffffbfff1ef9dcf R12: ffffffff8df42a00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f43f25616c0(0000) GS:ffff88818eb38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001032f2000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 ndisc_alloc_skb+0x380/0x480
 ndisc_send_rs+0x2b5/0x630
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 10 00 00 00 74 64 bf 01 00 00 00 e8 ab e6 47 f6 e8 e6 b9 7f f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900073bf860 EFLAGS: 00000286
RAX: 0d112c6a1520fd00 RBX: 0000000000000000 RCX: 0d112c6a1520fd00
RDX: 0000000000000006 RSI: ffffffff8d70f0cc RDI: 0000000000000001
RBP: ffffc900073bf900 R08: ffffffff8f7cee77 R09: 1ffffffff1ef9dce
R10: dffffc0000000000 R11: fffffbfff1ef9dcf R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000e77f0c
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:perf_event_exit_task+0x129/0x390
Code: 84 c0 0f 84 f2 00 00 00 4c 89 6c 24 30 e8 1f 1d ce ff 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 74 05 e8 17 32 34 00 <4d> 8b 6c 24 08 42 80 3c 33 00 74 08 4c 89 e7 e8 03 32 34 00 4d 8b
RSP: 0018:ffffc900073bf9c0 EFLAGS: 00000246
RAX: 1ffff11022ad4383 RBX: 1ffff11022ad4382 RCX: ffff88810c205700
RDX: 0000000000000000 RSI: ffffffff8bbf0e40 RDI: ffff8881156a1c18
RBP: ffffc900073bfad0 R08: ffffffff8f7cee77 R09: 1ffffffff1ef9dce
R10: dffffc0000000000 R11: fffffbfff1ef9dcf R12: ffff8881156a1c10
R13: ffff8881036d6d50 R14: dffffc0000000000 R15: ffff88810c206c08
 do_exit+0x643/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1285/0x1340
 arch_do_signal_or_restart+0xa0/0x790
 exit_to_user_mode_loop+0x72/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f43f178f749
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:00007f43f2561038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000048 RBX: 00007f43f19e6090 RCX: 00007f43f178f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f43f1813f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f43f19e6128 R14: 00007f43f19e6090 R15: 00007ffe6dae1a48
 </TASK>
sched: DL replenish lagged too much
