clocksource: Long readout interval, skipping watchdog check: cs_nsec: 93488426120 wd_nsec: 93488428216
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10449 ticks this GP) idle=20fc/1/0x4000000000000000 softirq=17285/17289 fqs=4685
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   993091          4            0
rcu: 	cputime:    37351      15088           47   ==> 52440(ms)
rcu: 	(t=10501 jiffies g=10225 q=3638 ncpus=2)
CPU: 1 UID: 0 PID: 6666 Comm: syz.3.190 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+0x16c/0x340
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 d4 38 e0 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000a08258 EFLAGS: 00000206
RAX: f2a1e0f19450ba00 RBX: 0000000000000000 RCX: f2a1e0f19450ba00
RDX: 00000000fd7ea41a RSI: ffffffff8d97916f RDI: ffffffff8bc082e0
RBP: ffffffff81743f85 R08: ffffffff81743f85 R09: ffffffff8df41a20
R10: ffffc90000a08418 R11: ffffffff81ada120 R12: 0000000000000002
R13: ffffffff8df41a20 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f068a1d46c0(0000) GS:ffff8882a9e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556c9745c8 CR3: 0000000173f00000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0xc2/0x23d0
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 __kfence_alloc+0x2b2/0x3b0
 __kmalloc_cache_noprof+0x5fe/0x700
 dst_cow_metrics_generic+0x56/0x1c0
 icmp6_dst_alloc+0x264/0x420
 ndisc_send_skb+0x3f1/0x1510
 addrconf_rs_timer+0x369/0x6a0
 call_timer_fn+0x16e/0x590
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x27d/0x850
 __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:__schedule+0x18a/0x5000
Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 ae 7a cb f6 48 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 8c 7a cb f6 48 81 3b 9d 6e ac 57 0f 85 5b 19 00
RSP: 0018:ffffc900075e7940 EFLAGS: 00000246
RAX: 1ffff92000ebc000 RBX: ffffc900075e0000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8bc082c0 RDI: ffffffff8bc08280
RBP: ffffc900075e7b50 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: ffff8882a9e35000
R13: 0000000000000001 R14: ffff888175901d40 R15: 1ffff110478c7680
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x5d8/0x660
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:mutex_unlock+0x4/0x10
Code: 62 de 33 f6 e9 a9 fd ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> 8b 34 24 eb 16 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900075e7d18 EFLAGS: 00000246
RAX: f2a1e0f19450ba00 RBX: ffff888102f2e800 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d792409 RDI: ffff888102f2e840
RBP: ffffc900075e7ed0 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: ffff888102eab888
R13: ffff888175901d40 R14: 1ffff92000ebcfb0 R15: ffff888102eabad0
 __se_sys_perf_event_open+0x1978/0x1d90
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f068938f7c9
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:00007f068a1d4038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f06895e5fa0 RCX: 00007f068938f7c9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007f06893f297f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f06895e6038 R14: 00007f06895e5fa0 R15: 00007ffdf7b0b5f8
 </TASK>
sched: DL replenish lagged too much
