clocksource: Long readout interval, skipping watchdog check: cs_nsec: 90281837611 wd_nsec: 90281839654
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1458 ticks this GP) idle=1fa4/1/0x4000000000000000 softirq=15567/15567 fqs=4476
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   279534          1            0
rcu: 	cputime:    10286       4272           17   ==> 14560(ms)
rcu: 	(t=10500 jiffies g=8373 q=2871 ncpus=2)
CPU: 0 UID: 0 PID: 6359 Comm: syz.1.136 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+0x175/0x360
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 4b 13 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000007278 EFLAGS: 00000206
RAX: 31653981e360e600 RBX: 0000000000000000 RCX: 31653981e360e600
RDX: 0000000000000000 RSI: ffffffff8dba65a5 RDI: ffffffff8be33700
RBP: ffffffff8172c195 R08: 0000000000000000 R09: ffffffff8172c195
R10: ffffc90000007448 R11: fffff52000000e95 R12: 0000000000000002
R13: ffffffff8e139ea0 R14: 0000000000000000 R15: 0000000000000246
FS:  00007f6f0579e6c0(0000) GS:ffff8880b8619000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1353056c0 CR3: 0000000029caa000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0xc2/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 dst_cow_metrics_generic+0x56/0x1c0
 icmp6_dst_alloc+0x264/0x420
 ndisc_send_skb+0x41f/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_acquire+0x175/0x360
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 4b 13 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000461efc0 EFLAGS: 00000206
RAX: 31653981e360e600 RBX: 0000000000000000 RCX: 31653981e360e600
RDX: 0000000000000000 RSI: ffffffff8dba65a5 RDI: ffffffff8be33700
RBP: ffffffff81cb03c7 R08: 0000000000000000 R09: ffffffff81cb03c7
R10: dffffc0000000000 R11: fffff91fe28c9fe5 R12: 0000000000000002
R13: ffffffff8e139ea0 R14: 0000000000000000 R15: 0000000000000246
 trace_call_bpf+0xd4/0x850
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock+0x2f8/0x3b0
 lock_release+0x3b2/0x3e0
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 __register_sysctl_table+0x72/0x1340
 neigh_sysctl_register+0x9a2/0xa80
 devinet_sysctl_register+0xad/0x200
 inetdev_init+0x2b4/0x500
 inetdev_event+0x301/0x15b0
 notifier_call_chain+0x1b6/0x3e0
 register_netdevice+0x1608/0x1ae0
 ppp_dev_configure+0x8a4/0xb10
 ppp_ioctl+0x6a5/0x19a0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f0498eba9
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:00007f6f0579e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6f04bd5fa0 RCX: 00007f6f0498eba9
RDX: 000000110c230000 RSI: 00000000c004743e RDI: 0000000000000005
RBP: 00007f6f04a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6f04bd6038 R14: 00007f6f04bd5fa0 R15: 00007fffebb71ec8
 </TASK>
sched: DL replenish lagged too much
