c3 00 ..
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: 9 Comm: kworker/u16:0 Not tainted 5.16.0-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 21 fe 64 fb e8 f9 da 60 f8 48 8b 1d 22 3d 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 20 9d 1e 8a e8 89 3b eb ff
RSP: 0018:ffffc900005cfd10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8915f317 RDI: 0000000000000010
RBP: ffffffff8c6a6a40 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff847af196 R11: 0000000000000000 R12: 0000000000000001
R13: ffffc900005cfdb0 R14: ffff888011850600 R15: ffff888010c75800
FS: 0000000000000000(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556222708 CR3: 0000000075d34000 CR4: 0000000000150ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298
worker_thread+0x65d/0x1130 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 aaa6d7e78d3de1c8 ]---
RIP: 0010:reset_interrupt.cold+0x3d/0x88 drivers/block/floppy.c:1790
Code: e8 cf f9 ff ff e9 21 fe 64 fb e8 f9 da 60 f8 48 8b 1d 22 3d 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 20 9d 1e 8a e8 89 3b eb ff
RSP: 0018:ffffc900005cfd10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8915f317 RDI: 0000000000000010
RBP: ffffffff8c6a6a40 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff847af196 R11: 0000000000000000 R12: 0000000000000001
R13: ffffc900005cfdb0 R14: ffff888011850600 R15: ffff888010c75800
FS: 0000000000000000(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556222708 CR3: 0000000075d34000 CR4: 0000000000150ef0
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 21 fe 64 fb jmpq 0xfb64fe2b
a: e8 f9 da 60 f8 callq 0xf860db08
f: 48 8b 1d 22 3d 65 07 mov 0x7653d22(%rip),%rbx # 0x7653d38
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 20 9d 1e 8a mov $0xffffffff8a1e9d20,%rdi
3b: e8 89 3b eb ff callq 0xffeb3bc9