------------[ cut here ]------------
WARNING: CPU: 0 PID: 3011 at kernel/rcu/tree_stall.h:894 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:886
Modules linked in:
CPU: 0 PID: 3011 Comm: syz-executor.0 Not tainted 5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:894
Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 a0 25 24 90 e8 de a2 5a 00 b8 01 00 00 00 87 05 63 77 c2 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 50 98 8b 48 c7 c3 ec c2 6c 8d 74 58 48 b8 00 00
RSP: 0018:ffffc90000007e30 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 00000001000515e2 RCX: ffffffff8161ae32
RDX: fffffbfff20484b4 RSI: 0000000000000004 RDI: ffffffff902425a0
RBP: ffffffff8b9850c0 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff20484b4 R11: 1ffff1101738a526 R12: 1ffffffff16c1e30
R13: 0000000000000246 R14: ffff8880b9c52852 R15: 0000000000000001
FS:  00007f04601f0700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000027bb6000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:857 [inline]
 rcu_core+0x4df/0x1380 kernel/rcu/tree.c:2780
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6326
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 92 26 20 f8 e8 dd 70 4c f8 fb bf 01 00 00 00 <e8> d2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 a0 15 20
RSP: 0018:ffffc900025cfb08 EFLAGS: 00000202
RAX: 00000000000b40c7 RBX: ffff88801b680000 RCX: 1ffffffff1ad8c89
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed10036d0000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817bd258 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x31/0x80 kernel/entry/common.c:427
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_pc+0x4c/0x60 kernel/kcov.c:202
Code: 0e 85 c9 74 35 8b 82 34 15 00 00 85 c0 74 2b 8b 82 10 15 00 00 83 f8 02 75 20 48 8b 8a 18 15 00 00 8b 92 14 15 00 00 48 8b 01 <48> 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 c3 0f 1f 00 41 55
RSP: 0018:ffffc900025cfbd8 EFLAGS: 00000246
RAX: 00000000000003f5 RBX: 0000000000000007 RCX: ffffc90002872000
RDX: 0000000000040000 RSI: ffffffff81ca6854 RDI: 0000000000000003
RBP: ffff88808d4b2090 R08: 0000000000000007 R09: 000000000000005d
R10: ffffffff81ca684a R11: 000000000000002f R12: ccaefc5106e7ef0d
R13: 0000000000000007 R14: 538739e70b7749fc R15: 005d746e6576655f
 full_name_hash+0x84/0xf0 fs/namei.c:2088
 tomoyo_fill_path_info+0x229/0x410 security/tomoyo/util.c:685
 tomoyo_get_realpath security/tomoyo/file.c:153 [inline]
 tomoyo_path_number_perm+0x2bb/0x590 security/tomoyo/file.c:723
 security_file_ioctl+0x50/0xb0 security/security.c:1540
 __do_sys_ioctl fs/ioctl.c:1063 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04601f0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9
RDX: 0000000000000e43 RSI: 0000000000002402 RDI: 0000000000000007
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0
R13: 00007ffc291be93f R14: 00007f04601f0300 R15: 0000000000022000
----------------
Code disassembly (best guess):
   0:	55                   	push   %rbp
   1:	53                   	push   %rbx
   2:	65 48 8b 1c 25 00 f0 	mov    %gs:0x1f000,%rbx
   9:	01 00
   b:	48 89 dd             	mov    %rbx,%rbp
   e:	48 c1 ed 03          	shr    $0x3,%rbp
  12:	48 01 c5             	add    %rax,%rbp
  15:	bf 01 00 00 00       	mov    $0x1,%edi
  1a:	e8 92 26 20 f8       	callq  0xf82026b1
  1f:	e8 dd 70 4c f8       	callq  0xf84c7101
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 d2 cd ff ff       	callq  0xffffce01 <-- trapping instruction
  2f:	9c                   	pushfq
  30:	58                   	pop    %rax
  31:	fa                   	cli
  32:	f6 c4 02             	test   $0x2,%ah
  35:	75 27                	jne    0x5e
  37:	bf 01 00 00 00       	mov    $0x1,%edi
  3c:	e8                   	.byte 0xe8
  3d:	a0                   	.byte 0xa0
  3e:	15                   	.byte 0x15
  3f:	20                   	.byte 0x20