------------[ cut here ]------------
WARNING: CPU: 2 PID: 3774 at drivers/block/floppy.c:999 schedule_bh+0x5f/0x70 drivers/block/floppy.c:999
Modules linked in:
CPU: 2 PID: 3774 Comm: udevd Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:schedule_bh+0x5f/0x70 drivers/block/floppy.c:999
Code: 47 59 05 fd 48 89 2d 30 f6 e2 0b 5b 48 c7 c2 a0 55 48 8c 48 8b 35 01 fb e2 0b bf 08 00 00 00 5d e9 76 40 da fc e8 21 59 05 fd <0f> 0b eb d1 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 e8 0b 59 05 fd
RSP: 0018:ffffc90000780dd0 EFLAGS: 00010046
RAX: 0000000080010000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801981a180 RSI: ffffffff8470b56f RDI: 0000000000000003
RBP: ffffffff8470e210 R08: 0000000000000000 R09: ffffffff8c4855a7
R10: ffffffff8470b53f R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff8470e210 R14: 0000000000000000 R15: ffff888010de1000
FS:  00007f3e594a0840(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3e599a3dff CR3: 000000004a37d000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 floppy_interrupt+0x228/0x340 drivers/block/floppy.c:1765
 floppy_hardint+0x256/0x320 arch/x86/include/asm/floppy.h:66
 __handle_irq_event_percpu+0x303/0x8f0 kernel/irq/handle.c:156
 handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
 handle_irq_event+0x102/0x280 kernel/irq/handle.c:213
 handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:822
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq arch/x86/kernel/irq.c:231 [inline]
 __common_interrupt+0x9d/0x210 arch/x86/kernel/irq.c:250
 common_interrupt+0x9f/0xd0 arch/x86/kernel/irq.c:240
 </IRQ>
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:629
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:197
Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 64 15 00 00 85 c0 74 2b 8b 82 40 15 00 00 <83> f8 02 75 20 48 8b 8a 48 15 00 00 8b 92 44 15 00 00 48 8b 01 48
RSP: 0018:ffffc90002f17710 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801981a180 RSI: ffffffff83a8f5c7 RDI: ffff88801441f3a8
RBP: ffffc90002f17848 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff83a8f512 R11: 000000000000001f R12: ffff88801441f380
R13: ffffc90002f17828 R14: 0000000000000000 R15: 0000000000000000
 tomoyo_compare_name_union security/tomoyo/file.c:87 [inline]
 tomoyo_compare_name_union security/tomoyo/file.c:82 [inline]
 tomoyo_check_path_acl security/tomoyo/file.c:260 [inline]
 tomoyo_check_path_acl+0x157/0x210 security/tomoyo/file.c:252
 tomoyo_check_acl+0x13c/0x450 security/tomoyo/domain.c:175
 tomoyo_path_permission security/tomoyo/file.c:586 [inline]
 tomoyo_path_permission+0x1ff/0x3a0 security/tomoyo/file.c:573
 tomoyo_check_open_permission+0x33e/0x380 security/tomoyo/file.c:777
 tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
 tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
 security_file_open+0x45/0xb0 security/security.c:1634
 do_dentry_open+0x353/0x11d0 fs/open.c:809
 do_open fs/namei.c:3428 [inline]
 path_openat+0x1c9a/0x2740 fs/namei.c:3561
 do_filp_open+0x1aa/0x400 fs/namei.c:3588
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1200
 do_sys_open fs/open.c:1216 [inline]
 __do_sys_openat fs/open.c:1232 [inline]
 __se_sys_openat fs/open.c:1227 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1227
 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: 0033:0x7f3e595f7697
Code: 25 00 00 41 00 3d 00 00 41 00 74 37 64 8b 04 25 18 00 00 00 85 c0 75 5b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 85 00 00 00 48 83 c4 68 5d 41 5c c3 0f 1f
RSP: 002b:00007ffd194cd5e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055c13e78fdb0 RCX: 00007f3e595f7697
RDX: 0000000000080000 RSI: 00007ffd194cd718 RDI: 00000000ffffff9c
RBP: 00007ffd194cd718 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 000055c13e78fdb0 R14: 0000000000000001 R15: 000055c13d6dc160
----------------
Code disassembly (best guess):
   0:	81 e1 00 01 00 00    	and    $0x100,%ecx
   6:	65 48 8b 14 25 40 f0 	mov    %gs:0x1f040,%rdx
   d:	01 00
   f:	a9 00 01 ff 00       	test   $0xff0100,%eax
  14:	74 0e                	je     0x24
  16:	85 c9                	test   %ecx,%ecx
  18:	74 35                	je     0x4f
  1a:	8b 82 64 15 00 00    	mov    0x1564(%rdx),%eax
  20:	85 c0                	test   %eax,%eax
  22:	74 2b                	je     0x4f
  24:	8b 82 40 15 00 00    	mov    0x1540(%rdx),%eax
* 2a:	83 f8 02             	cmp    $0x2,%eax <-- trapping instruction
  2d:	75 20                	jne    0x4f
  2f:	48 8b 8a 48 15 00 00 	mov    0x1548(%rdx),%rcx
  36:	8b 92 44 15 00 00    	mov    0x1544(%rdx),%edx
  3c:	48 8b 01             	mov    (%rcx),%rax
  3f:	48                   	rex.W