rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10498 ticks this GP) idle=f96c/1/0x4000000000000000 softirq=16282/16282 fqs=4455
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   978828          0            0
rcu: 	cputime:    24013      16898           59   ==> 40920(ms)
rcu: 	(t=10500 jiffies g=8269 q=4729 ncpus=2)
CPU: 1 UID: 0 PID: 6074 Comm: syz.2.57 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:get_random_u32+0x4e7/0x940
Code: e3 00 02 00 00 75 7e e8 a7 a4 6d fc 48 8b 5c 24 28 4d 85 ff 75 07 e8 98 a4 6d fc eb 06 e8 91 a4 6d fc fb 8b 84 24 00 01 00 00 <48> c7 44 24 40 0e 36 e0 45 42 c7 04 23 00 00 00 00 4a c7 44 23 0c
RSP: 0018:ffffc900001e0920 EFLAGS: 00000246
RAX: 00000000fe43b70c RBX: 1ffff9200003c12c RCX: ffff888022cdd640
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0a88 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: dffffc0000000000
R13: 0000000000000016 R14: ffff888136636230 R15: 0000000000000200
FS:  00007f427edaf6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000023000 CR3: 000000002ae2e000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 rfc3315_s14_backoff_update+0x14/0xc0
 addrconf_rs_timer+0x3bc/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:ffffc9000435f7a0 EFLAGS: 00000286
RAX: b0e547e8d7c18400 RBX: 0000000000000000 RCX: b0e547e8d7c18400
RDX: 0000000000000007 RSI: ffffffff8d9b6a5f RDI: 0000000000000001
RBP: ffffc9000435f840 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200086bef4
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:string+0x19f/0x2b0
Code: e1 07 38 c1 7c 8f e8 70 9b ad f6 eb 88 44 89 e9 80 e1 07 38 c1 7c bd 4c 89 ef e8 4c 9c ad f6 eb b3 41 c1 fd 10 4c 89 6c 24 10 <49> 8d 5d ff 45 31 ed 4b 8d 3c 2c 48 89 f8 48 c1 e8 03 48 b9 00 00
RSP: 0018:ffffc9000435f900 EFLAGS: 00000286
RAX: ffffffff8b7583ec RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff888022cdd640 RSI: 00000000ffff0a00 RDI: 0000000000010000
RBP: ffffffff8bdc41cd R08: ffff888022cdd640 R09: 0000000000000008
R10: 0000000000000007 R11: 0000000000000002 R12: ffffc9000435fc40
R13: 00000000ffffffff R14: 0000000000000023 R15: 0000000000000028
 vsnprintf+0x739/0xf00
 tomoyo_supervisor+0x133/0x1480
 tomoyo_path_number_perm+0x438/0x5a0
 security_file_ioctl+0xcb/0x2d0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f427df8ebe9
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:00007f427edaf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f427e1c5fa0 RCX: 00007f427df8ebe9
RDX: 0000000000000009 RSI: 0000000000002403 RDI: 0000000000000004
RBP: 00007f427e011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f427e1c6038 R14: 00007f427e1c5fa0 R15: 00007fff16becef8
 </TASK>
