------------[ cut here ]------------
WARNING: CPU: 2 PID: 11 at drivers/block/floppy.c:1000 schedule_bh+0x5f/0x70 drivers/block/floppy.c:1000
Modules linked in:
CPU: 2 PID: 11 Comm: kworker/u16:1 Not tainted 5.15.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: bat_events batadv_nc_worker
RIP: 0010:schedule_bh+0x5f/0x70 drivers/block/floppy.c:1000
Code: 67 4d 06 fd 48 89 2d 00 8b e7 0b 5b 48 c7 c2 a0 0b 49 8c 48 8b 35 d1 8f e7 0b bf 08 00 00 00 5d e9 86 d2 da fc e8 41 4d 06 fd <0f> 0b eb d1 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 e8 2b 4d 06 fd
RSP: 0018:ffffc90000780dd0 EFLAGS: 00010046
RAX: 0000000080010000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff8880118a42c0 RSI: ffffffff8470afdf RDI: 0000000000000003
RBP: ffffffff8470d4f0 R08: 0000000000000000 R09: ffffffff8c490ba7
R10: ffffffff8470afaf R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff8470d4f0 R14: 0000000000000000 R15: ffff888010de2000
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557240708 CR3: 0000000016564000 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:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5605
Code: 65 a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900005efba0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920000bdf76 RCX: 2b74e34af595c052
RDX: 1ffff110023149a3 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fd4ca07
R10: fffffbfff1fa9940 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8b980ea0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
 rcu_read_lock include/linux/rcupdate.h:688 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	65 a6                	cmpsb  %es:(%rdi),%gs:(%rsi)
   2:	7e 83                	jle    0xffffff87
   4:	f8                   	clc
   5:	01 0f                	add    %ecx,(%rdi)
   7:	85 b4 02 00 00 9c 58 	test   %esi,0x589c0000(%rdx,%rax,1)
   e:	f6 c4 02             	test   $0x2,%ah
  11:	0f 85 9f 02 00 00    	jne    0x2b6
  17:	48 83 7c 24 08 00    	cmpq   $0x0,0x8(%rsp)
  1d:	74 01                	je     0x20
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2d:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  34:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3b:	00
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24