last redo_fd_request at 4295015942
status=d0
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: 0 PID: 20019 Comm: kworker/u16:5 Not tainted 6.4.0-rc7-syzkaller-00204-g61dabacdad4e #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+0x17a/0x230 drivers/block/floppy.c:1789
Code: ec 66 44 fc e9 0e ff ff ff e8 42 86 60 fc 48 8b 1d fb 43 ea 0c 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 80 00 00 00 48 8b 73 10 48 c7 c7 60 22 d0 8a e8
RSP: 0018:ffffc90028527d10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8523c31e RDI: 0000000000000010
RBP: ffffffff8d46df40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90028527db0
R13: ffffffff8d46df50 R14: ffff888063575a00 R15: ffff888012a49000
FS:  0000000000000000(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f734e1b0 CR3: 0000000064a64000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2408
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2555
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:reset_interrupt+0x17a/0x230 drivers/block/floppy.c:1789
Code: ec 66 44 fc e9 0e ff ff ff e8 42 86 60 fc 48 8b 1d fb 43 ea 0c 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 80 00 00 00 48 8b 73 10 48 c7 c7 60 22 d0 8a e8
RSP: 0018:ffffc90028527d10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8523c31e RDI: 0000000000000010
RBP: ffffffff8d46df40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90028527db0
R13: ffffffff8d46df50 R14: ffff888063575a00 R15: ffff888012a49000
FS:  0000000000000000(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f734e1b0 CR3: 0000000064a64000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	ec                   	in     (%dx),%al
   1:	66 44 fc             	data16 rex.R cld
   4:	e9 0e ff ff ff       	jmpq   0xffffff17
   9:	e8 42 86 60 fc       	callq  0xfc608650
   e:	48 8b 1d fb 43 ea 0c 	mov    0xcea43fb(%rip),%rbx        # 0xcea4410
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  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:	0f 85 80 00 00 00    	jne    0xb4
  34:	48 8b 73 10          	mov    0x10(%rbx),%rsi
  38:	48 c7 c7 60 22 d0 8a 	mov    $0xffffffff8ad02260,%rdi
  3f:	e8                   	.byte 0xe8