last redo_fd_request at 4295115658
status=80
fdc_busy=0
cont=0000000000000000
current_req=0000000000000000
command_status=-1
general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 2 PID: 10036 Comm: kworker/u16:6 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: floppy floppy_work_workfn
RIP: 0010:reset_interrupt.cold+0x3d/0x88 drivers/block/floppy.c:1790
Code: e8 cf f9 ff ff e9 99 cd 64 fb e8 f1 20 61 f8 48 8b 1d 0a 0d 65 07 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 3e 48 8b 73 10 48 c7 c7 c0 88 1e 8a e8 69 3c eb ff
RSP: 0000:ffffc90000867d10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8915b1ef RDI: 0000000000000010
RBP: ffffffff8c6a41e0 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff847a7fe6 R11: 0000000000000000 R12: ffffc90000867db0
R13: ffffffff8c6a41f0 R14: ffff888012bba800 R15: ffff888010c75800
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000094e988 CR3: 000000000b88e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 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>
Modules linked in:
---[ end trace 4165ad23b7a78289 ]---
RIP: 0010:reset_interrupt.cold+0x3d/0x88 drivers/block/floppy.c:1790
Code: e8 cf f9 ff ff e9 99 cd 64 fb e8 f1 20 61 f8 48 8b 1d 0a 0d 65 07 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 3e 48 8b 73 10 48 c7 c7 c0 88 1e 8a e8 69 3c eb ff
RSP: 0000:ffffc90000867d10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8915b1ef RDI: 0000000000000010
RBP: ffffffff8c6a41e0 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff847a7fe6 R11: 0000000000000000 R12: ffffc90000867db0
R13: ffffffff8c6a41f0 R14: ffff888012bba800 R15: ffff888010c75800
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000094e988 CR3: 000000000b88e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 cf f9 ff ff       	callq  0xfffff9d4
   5:	e9 99 cd 64 fb       	jmpq   0xfb64cda3
   a:	e8 f1 20 61 f8       	callq  0xf8612100
   f:	48 8b 1d 0a 0d 65 07 	mov    0x7650d0a(%rip),%rbx        # 0x7650d20
  16:	b8 ff ff 37 00       	mov    $0x37ffff,%eax
  1b:	48 c1 e0 2a          	shl    $0x2a,%rax
  1f:	48 8d 7b 10          	lea    0x10(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 3e                	jne    0x6e
  30:	48 8b 73 10          	mov    0x10(%rbx),%rsi
  34:	48 c7 c7 c0 88 1e 8a 	mov    $0xffffffff8a1e88c0,%rdi
  3b:	e8 69 3c eb ff       	callq  0xffeb3ca9