BUG: unable to handle page fault for address: ffffc90000ebf640
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1b000067 P4D 1b000067 PUD 1c2b9067 PMD 305b9067 PTE 0
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:ioread32+0x1c/0x80 lib/iomap.c:99
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 48 89 fb e8 e2 b5 e7 fc 48 81 fb 00 00 04 00 72 09 e8 d4 b5 e7 fc <8b> 03 eb 55 48 81 fb 01 00 01 00 72 0a e8 c2 b5 e7 fc 89 da ed eb
RSP: 0018:ffffc9000e45f850 EFLAGS: 00010293
RAX: ffffffff84df6cec RBX: ffffc90000ebf640 RCX: ffff8880344d4a80
RDX: 0000000000000000 RSI: ffffffff8e231ffb RDI: ffffc90000ebf640
RBP: 1ffff11001ce5110 R08: ffffffff9057c237 R09: 1ffffffff20af846
R10: dffffc0000000000 R11: fffffbfff20af847 R12: ffff88800e728888
R13: ffff88801d2cc0d0 R14: ffff88800e728838 R15: 1ffff11001ce5111
FS:  00007f6a9a9b06c0(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000ebf640 CR3: 000000001faec000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 nhi_probe+0xcc/0x880 drivers/thunderbolt/nhi.c:1198
 nhi_pci_probe+0x46b/0x580 drivers/thunderbolt/pci.c:479
 local_pci_probe drivers/pci/pci-driver.c:332 [inline]
 pci_call_probe drivers/pci/pci-driver.c:394 [inline]
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0x431/0xc90 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203
 bind_store+0x1d0/0x220 drivers/base/bus.c:267
 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a99b9e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a9a9affe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a99e25fa0 RCX: 00007f6a99b9e019
RDX: 000000000000000d RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f6a99c3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a99e26038 R14: 00007f6a99e25fa0 R15: 00007ffe4f4d7738
 </TASK>
Modules linked in:
CR2: ffffc90000ebf640
---[ end trace 0000000000000000 ]---
RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:ioread32+0x1c/0x80 lib/iomap.c:99
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 48 89 fb e8 e2 b5 e7 fc 48 81 fb 00 00 04 00 72 09 e8 d4 b5 e7 fc <8b> 03 eb 55 48 81 fb 01 00 01 00 72 0a e8 c2 b5 e7 fc 89 da ed eb
RSP: 0018:ffffc9000e45f850 EFLAGS: 00010293
RAX: ffffffff84df6cec RBX: ffffc90000ebf640 RCX: ffff8880344d4a80
RDX: 0000000000000000 RSI: ffffffff8e231ffb RDI: ffffc90000ebf640
RBP: 1ffff11001ce5110 R08: ffffffff9057c237 R09: 1ffffffff20af846
R10: dffffc0000000000 R11: fffffbfff20af847 R12: ffff88800e728888
R13: ffff88801d2cc0d0 R14: ffff88800e728838 R15: 1ffff11001ce5111
FS:  00007f6a9a9b06c0(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000ebf640 CR3: 000000001faec000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	f3 0f 1e fa          	endbr64
  12:	55                   	push   %rbp
  13:	53                   	push   %rbx
  14:	48 89 fb             	mov    %rdi,%rbx
  17:	e8 e2 b5 e7 fc       	call   0xfce7b5fe
  1c:	48 81 fb 00 00 04 00 	cmp    $0x40000,%rbx
  23:	72 09                	jb     0x2e
  25:	e8 d4 b5 e7 fc       	call   0xfce7b5fe
* 2a:	8b 03                	mov    (%rbx),%eax <-- trapping instruction
  2c:	eb 55                	jmp    0x83
  2e:	48 81 fb 01 00 01 00 	cmp    $0x10001,%rbx
  35:	72 0a                	jb     0x41
  37:	e8 c2 b5 e7 fc       	call   0xfce7b5fe
  3c:	89 da                	mov    %ebx,%edx
  3e:	ed                   	in     (%dx),%eax
  3f:	eb                   	.byte 0xeb