rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=cce4/1/0x4000000000000000 softirq=23863/23863 fqs=2539
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1043081          0            0
rcu: 	cputime:    33911      18555           88   ==> 52470(ms)
rcu: 	(t=10500 jiffies g=17049 q=2786 ncpus=2)
CPU: 1 UID: 0 PID: 8335 Comm: syz.2.1075 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:kasan_record_aux_stack+0x62/0xd0
Code: c2 0f 85 81 00 00 00 4c 8b 71 08 48 89 ce 48 2b 35 3b 4c 9a 0b 48 c1 e6 06 48 03 35 20 4c 9a 0b 48 89 d8 48 29 f0 41 8b 7e 18 <48> 89 c2 48 c1 ea 20 74 07 48 99 48 f7 ff eb 04 31 d2 f7 f7 48 29
RSP: 0018:ffffc900001e0308 EFLAGS: 00000202
RAX: 00000000000007d0 RBX: ffff8881128c07d0 RCX: ffffea00044a3000
RDX: ffffffffdc4c0700 RSI: ffff8881128c0000 RDI: 0000000000000180
RBP: ffffc900001e0450 R08: 0000000000000000 R09: ffffffff81748958
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: 1ffff9200003c074 R14: ffff888022da7dc0 R15: 0000000000000000
FS:  00007effc5e9e6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f881662440e CR3: 000000010f562000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_rcu+0x157/0x9c0
 __dev_queue_xmit+0x85c/0x3b50
 ip6_finish_output2+0x11fe/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 2f b7 ea 09 e8 5a 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:ffffc9000306f518 EFLAGS: 00000286
RAX: 6178d1b5f0770a00 RBX: 0000000000000000 RCX: 6178d1b5f0770a00
RDX: 0000000000000007 RSI: ffffffff8d9b6a0a RDI: ffffffff8be33300
RBP: ffffc9000306f570 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff8880214a3980
R13: dffffc0000000000 R14: ffff88801c6c5640 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_switch+0x7/0x130
Code: 0a 20 c3 cc cc cc cc 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 06 <48> 8b 4e 08 48 83 c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74
RSP: 0018:ffffc9000306f908 EFLAGS: 00000287
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000937a000 RSI: ffffffff8f8a83d0 RDI: 0000000000000000
RBP: ffffffff8b9a3280 R08: ffffc9000306fadf R09: 0000000000000000
R10: ffffc9000306faa0 R11: fffff5200060df5c R12: ffffc9000306fa60
R13: ffffc9000306f9b8 R14: 0000000000000000 R15: ffffffff8b9a3280
 format_decode+0x2f/0xe30
 vsnprintf+0x102/0xf00
 dynamic_dname+0xfc/0x1b0
 tomoyo_realpath_from_path+0x170/0x5d0
 tomoyo_path_number_perm+0x1e8/0x5a0
 security_file_ioctl+0xcb/0x2d0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7effc4f8ebe9
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:00007effc5e9e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007effc51b5fa0 RCX: 00007effc4f8ebe9
RDX: 00002000000013c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007effc5011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007effc51b6038 R14: 00007effc51b5fa0 R15: 00007fff3fc53eb8
 </TASK>
