rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10496 ticks this GP) idle=e864/1/0x4000000000000000 softirq=18132/18134 fqs=4749
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1281476          4            0
rcu: 	cputime:    29897      22582          103   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10865 q=34848 ncpus=2)
CPU: 1 UID: 0 PID: 6442 Comm: syz.3.89 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:deref_stack_reg+0x1c0/0x230
Code: c7 49 89 f7 e8 11 08 00 00 49 89 c6 48 8b 5c 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 43 39 b0 00 4c 89 33 <b0> 01 eb 02 31 c0 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d e9 07
RSP: 0018:ffffc900001e0160 EFLAGS: 00000246
RAX: 1ffff9200003c059 RBX: ffffc900001e02c8 RCX: 0000000000000001
RDX: ffffc900001e02c8 RSI: dffffc0000000000 RDI: ffffc9000335fcf0
RBP: 1ffff9200003c051 R08: ffffc9000335fcf0 R09: 0000000000000000
R10: ffffc900001e02d8 R11: fffff5200003c05d R12: 1ffff9200003c052
R13: 1ffff9200003c053 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f12152796c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000003d CR3: 0000000112684000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_next_frame+0x17c4/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 ___neigh_create+0x6d5/0x2260
 ip6_finish_output2+0xb4d/0x16a0
 ndisc_send_skb+0xb54/0x1440
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 fb 98 15 f6 e8 36 f3 4c 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:ffffc9000335fc40 EFLAGS: 00000286
RAX: 0bd49232863a4400 RBX: 0000000000000000 RCX: 0bd49232863a4400
RDX: 0000000000000000 RSI: ffffffff8d9b6a28 RDI: 0000000000000001
RBP: ffffc9000335fcf0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200066bf88
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_switch+0x7d/0x130
Code: 75 13 e9 c2 00 00 00 b9 01 00 00 00 48 85 c0 0f 84 b4 00 00 00 41 57 41 56 41 54 53 48 8b 54 24 20 65 4c 8b 04 25 08 40 a0 92 <45> 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d
RSP: 0018:ffffc9000335fdb8 EFLAGS: 00000206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000005
RDX: ffffffff81b352a6 RSI: ffffffff8e16ab40 RDI: 0000000000000001
RBP: ffffc9000335fee0 R08: ffff88810d869cc0 R09: 0000000000000000
R10: ffffc9000335fe60 R11: fffff5200066bfce R12: 0000000000000001
R13: ffffc9000335fe60 R14: ffffffffffffffff R15: 0000000000000001
 __se_sys_futex+0xe6/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f121438ebe9
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:00007f12152790e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f12145b6098 RCX: 00007f121438ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f12145b609c
RBP: 00007f12145b6090 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f12145b6128 R14: 00007ffc429e5d40 R15: 00007ffc429e5e28
 </TASK>
