------------[ cut here ]------------
WARNING: CPU: 3 PID: 33 at drivers/block/floppy.c:999 schedule_bh drivers/block/floppy.c:999 [inline]
WARNING: CPU: 3 PID: 33 at drivers/block/floppy.c:999 floppy_interrupt+0x32b/0x3a0 drivers/block/floppy.c:1765
Modules linked in:
CPU: 3 PID: 33 Comm: ksoftirqd/3 Not tainted 5.19.0-rc6-syzkaller-00115-g4a57a8400075 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:schedule_bh drivers/block/floppy.c:999 [inline]
RIP: 0010:floppy_interrupt+0x32b/0x3a0 drivers/block/floppy.c:1765
Code: fe ff ff e8 87 25 e0 fc 0f b6 1d 80 24 89 0c 31 ff 89 de e8 77 21 e0 fc 84 db 0f 85 30 b6 ad 04 e9 18 fe ff ff e8 65 25 e0 fc <0f> 0b e9 1a ff ff ff e8 29 e1 2c fd e9 ed fd ff ff e8 1f e1 2c fd
RSP: 0018:ffffc900005d8e58 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000100
RDX: ffff888012229d80 RSI: ffffffff849a457b RDI: 0000000000000007
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002
R13: ffffffff8499f800 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f6f5c034 CR3: 000000000ba8e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
floppy_hardint+0x1ad/0x200 arch/x86/include/asm/floppy.h:66
__handle_irq_event_percpu+0x22b/0x880 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xa7/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:817
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+0x22/0x40 arch/x86/include/asm/idtentry.h:640
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 ca de e3 f7 48 89 ef e8 d2 5f e4 f7 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> 43 67 d7 f7 65 8b 05 fc fb 87 76 85 c0 74 0a 5b 5d c3 e8 90 46
RSP: 0018:ffffc900005afbe0 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b77019
RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffffffff91193240 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff2232648 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000002 R14: dead000000000100 R15: dffffc0000000000
__debug_check_no_obj_freed lib/debugobjects.c:999 [inline]
debug_check_no_obj_freed+0x20c/0x420 lib/debugobjects.c:1020
slab_free_hook mm/slub.c:1729 [inline]
slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1780
slab_free mm/slub.c:3536 [inline]
kmem_cache_free+0xdd/0x5a0 mm/slub.c:3553
i_callback+0x3f/0x70 fs/inode.c:249
rcu_do_batch kernel/rcu/tree.c:2578 [inline]
rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2838
__do_softirq+0x29b/0x9c2 kernel/softirq.c:571
run_ksoftirqd kernel/softirq.c:934 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
----------------
Code disassembly (best guess):
0: 74 24 je 0x26
2: 10 e8 adc %ch,%al
4: ca de e3 lret $0xe3de
7: f7 48 89 ef e8 d2 5f testl $0x5fd2e8ef,-0x77(%rax)
e: e4 f7 in $0xf7,%al
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 43 67 d7 f7 callq 0xf7d76772 <-- trapping instruction
2f: 65 8b 05 fc fb 87 76 mov %gs:0x7687fbfc(%rip),%eax # 0x7687fc32
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: 90 nop
3f: 46 rex.RX