------------[ cut here ]------------
WARNING: CPU: 2 PID: 4023 at drivers/block/floppy.c:1000 schedule_bh+0x5f/0x70 drivers/block/floppy.c:1000
Modules linked in:
CPU: 2 PID: 4023 Comm: syz-executor.3 Not tainted 5.16.0-rc3-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:1000
Code: 77 7c fc fc 48 89 2d a0 70 00 0c 5b 48 c7 c2 00 42 6a 8c 48 8b 35 71 75 00 0c bf 08 00 00 00 5d e9 a6 fd d0 fc e8 51 7c fc fc <0f> 0b eb d1 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 e8 3b 7c fc fc
RSP: 0018:ffffc90000780dd0 EFLAGS: 00010046
RAX: 0000000000010002 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801866c000 RSI: ffffffff847a681f RDI: 0000000000000003
RBP: ffffffff847a8d30 R08: 0000000000000000 R09: ffffffff8c6a4207
R10: ffffffff847a67ef R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff847a8d30 R14: 0000000000000000 R15: ffff888010de5000
FS:  00007f300951d700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44a2309718 CR3: 0000000069cda000 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:1766
 floppy_hardint+0x1a7/0x200 arch/x86/include/asm/floppy.h:66
 __handle_irq_event_percpu+0x303/0x8f0 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:198 [inline]
 handle_irq_event+0x102/0x280 kernel/irq/handle.c:215
 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+0xa4/0xc0 arch/x86/kernel/irq.c:240
 </IRQ>
 <TASK>
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:629
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 0a df 14 f8 48 89 ef e8 52 55 15 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> e3 1d 08 f8 65 8b 05 ec 5b bb 76 85 c0 74 0a 5b 5d c3 e8 30 15
RSP: 0018:ffffc90003a9fb98 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1b218c9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff88801addac40 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817d2988 R11: 0000000000000000 R12: 0000000000000206
R13: ffff88801adda2d4 R14: ffff88801addac40 R15: ffff88802cd39b00
 try_to_wake_up+0x560/0x15a0 kernel/sched/core.c:4121
 wake_up_process kernel/sched/core.c:4203 [inline]
 wake_up_q+0x7e/0xf0 kernel/sched/core.c:953
 futex_wake+0x3e9/0x490 kernel/futex/waitwake.c:184
 do_futex+0x25b/0x390 kernel/futex/syscalls.c:127
 __do_sys_futex kernel/futex/syscalls.c:199 [inline]
 __se_sys_futex kernel/futex/syscalls.c:180 [inline]
 __x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:180
 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: 0033:0x7f300a5c8ae9
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:00007f300951d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f300a6dc030 RCX: 00007f300a5c8ae9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f300a6dc034
RBP: 00007f300a6dc028 R08: 0000000000000014 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f300a6dc034
R13: 00007ffc19dc6a0f R14: 00007f300951d300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	0a df                	or     %bh,%bl
   6:	14 f8                	adc    $0xf8,%al
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 52 55 15 f8       	callq  0xf8155562
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 25                	jne    0x3d
  18:	9c                   	pushfq
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 2d                	jne    0x4c
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 e3 1d 08 f8       	callq  0xf8081e12 <-- trapping instruction
  2f:	65 8b 05 ec 5b bb 76 	mov    %gs:0x76bb5bec(%rip),%eax        # 0x76bb5c22
  36:	85 c0                	test   %eax,%eax
  38:	74 0a                	je     0x44
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	retq
  3d:	e8                   	.byte 0xe8
  3e:	30                   	.byte 0x30
  3f:	15                   	.byte 0x15