rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=4314/1/0x4000000000000000 softirq=23074/23075 fqs=4714
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1065645          0            0
rcu: 	cputime:    30364      22115           83   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=14577 q=16053 ncpus=2)
CPU: 0 UID: 0 PID: 7470 Comm: syz.4.406 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:__sanitizer_cov_trace_const_cmp1+0x8/0x90
Code: 20 e9 4c 9b bc 09 cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 14 25 08 50 a0 92 65 8b 0d 68 8f e0 10 81 e1 00 01 ff 00
RSP: 0018:ffffc90000007218 EFLAGS: 00000246
RAX: ffffffff822389de RBX: 0000000000000920 RCX: 25784abffbba3900
RDX: 0000000000000100 RSI: 00000000000000f7 RDI: 00000000000000ff
RBP: ffffc90000007330 R08: ffffffff8fa38237 R09: 1ffffffff1f47046
R10: dffffc0000000000 R11: fffffbfff1f47047 R12: 000000001762898e
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000e50
FS:  00007f2efb31f6c0(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91e64f5000 CR3: 00000000226ac000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kfence_guarded_alloc+0xae/0xc70
 __kfence_alloc+0x385/0x3b0
 __kmalloc_noprof+0x440/0x4f0
 ___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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 cf e5 ea 09 e8 da 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90004a1fab8 EFLAGS: 00000286
RAX: 25784abffbba3900 RBX: 0000000000000000 RCX: 25784abffbba3900
RDX: 0000000000000000 RSI: ffffffff8d9b7034 RDI: ffffffff8be33500
RBP: ffffc90004a1fb10 R08: ffffffff8fa38237 R09: 1ffffffff1f47046
R10: dffffc0000000000 R11: fffffbfff1f47047 R12: ffff888106c4b980
R13: dffffc0000000000 R14: ffff88801c6a1cc0 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc90004a1fea8 EFLAGS: 00000246
RAX: ffffffff81b36241 RBX: ffffc90004a1ff58 RCX: ffff888106c4b980
RDX: ffffc90021c1f000 RSI: 0000000000000404 RDI: ffffc90004a1ff58
RBP: ffffc90004a1ff48 R08: ffffffff8fa38237 R09: 1ffffffff1f47046
R10: dffffc0000000000 R11: fffffbfff1f47047 R12: 00000000000000ca
R13: 00000000000000ca R14: dffffc0000000000 R15: ffff888106c4b980
 __x64_sys_futex+0x21/0xf0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2efa58ebe9
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:00007f2efb31f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f2efa7c5fa8 RCX: 00007f2efa58ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f2efa7c5fac
RBP: 00007f2efa7c5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2efa7c6038 R14: 00007fff5f579040 R15: 00007fff5f579128
 </TASK>
