rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10478 ticks this GP) idle=96e4/1/0x4000000000000000 softirq=96953/96953 fqs=5181
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   800284          0            0
rcu: 	cputime:    19780      32699           65   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=86981 q=3125 ncpus=2)
CPU: 1 UID: 0 PID: 23396 Comm: syz.8.5221 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:__netdev_alloc_skb+0x4/0x810
Code: e8 c1 31 51 f8 e9 e0 fc ff ff 66 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 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 18 89 d5 41 89 f6 49 89 fd
RSP: 0018:ffffc90000a08ac8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888174af9d40
RDX: 0000000000000820 RSI: 000000000000001c RDI: 0000000000000000
RBP: 0000000000000010 R08: ffffffff8b8f3e89 R09: ffffffff8e75e3e0
R10: dffffc0000000000 R11: ffffffff8b8f6170 R12: ffff8881add12dc0
R13: ffff88816ea85310 R14: ffff8881add121e2 R15: 000000000000000e
FS:  00007fbfa0f8f6c0(0000) GS:ffff8882a9463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000018852a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 hsr_init_skb+0xef/0x6e0
 send_hsr_supervision_frame+0x143/0xcb0
 hsr_announce+0x1db/0x370
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 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+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 63 c5 e4 f5 e8 1e 60 1e f6 fb bf 01 00 00 00 <e8> c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 f4 61 1e f6 bf 01
RSP: 0018:ffffc90005c87580 EFLAGS: 00000206
RAX: 000000000000241d RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8def4b7d RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff90118bb7 R09: 1ffffffff2023176
R10: dffffc0000000000 R11: fffffbfff2023177 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_cmp8+0x4/0x90
Code: 74 11 18 48 89 44 11 20 c3 cc cc cc cc cc 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 0d e8 2f 56 11 65 8b 15 09 30 56 11 81 e2 00
RSP: 0018:ffffc90005c876a8 EFLAGS: 00000246
RAX: 1ffff110227db041 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90030e0e000 RSI: 00007fbfa019c799 RDI: ffffffffa000090c
RBP: 0000000000000000 R08: ffffffff81d54476 R09: ffffffff8e75e3e0
R10: ffffc90005c87798 R11: ffffffff81b0bfa0 R12: ffffffffa000090c
R13: dffffc0000000000 R14: 00007fbfa019c799 R15: ffff888113ed8428
 is_bpf_text_address+0x143/0x2b0
 kernel_text_address+0xa5/0xe0
 __kernel_text_address+0xd/0x30
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfb/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c1/0x630
 tomoyo_realpath_from_path+0x598/0x5d0
 tomoyo_path_number_perm+0x246/0x630
 security_file_ioctl+0xc3/0x2a0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbfa019c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbfa0f8f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbfa0415fa0 RCX: 00007fbfa019c799
RDX: 0000000000000004 RSI: 0000000040042408 RDI: 0000000000000005
RBP: 00007fbfa0232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbfa0416038 R14: 00007fbfa0415fa0 R15: 00007ffe3164fbb8
 </TASK>
