BUG: unable to handle page fault for address: ffffc90003b39640
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1bc00067 P4D 1bc00067 PUD 1d293067 PMD 22695067 PTE 0
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 2 UID: 0 PID: 6033 Comm: syz-executor199 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+0x87/0xc0 lib/iomap.c:99
Code: 2d ee e9 59 0a 31 ff 89 ee e8 d5 b6 e3 fc 85 ed 75 28 e8 5c bc e3 fc bb ff ff ff ff 89 d8 5b 5d c3 cc cc cc cc e8 49 bc e3 fc <8b> 1b e8 42 bc e3 fc 89 d8 5b 5d e9 19 4d 97 06 e8 34 bc e3 fc 83
RSP: 0018:ffffc90003ab76f0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90003b39640 RCX: ffffffff8526b6cb
RDX: ffff88802bc42540 RSI: ffffffff8526b737 RDI: ffff88802bc42540
RBP: ffff88802efa9838 R08: 0000000000000007 R09: 000000000003ffff
R10: ffffc90003b39640 R11: 0000000000000000 R12: 1ffff92000756eed
R13: ffff8880231120d0 R14: ffff88802efa9880 R15: ffffc90003ab7788
FS:  0000555567013400(0000) GS:ffff8880d5fec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90003b39640 CR3: 00000000364fc000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 nhi_probe+0xdc/0x8f0 drivers/thunderbolt/nhi.c:1198
 nhi_pci_probe+0x322/0x5a0 drivers/thunderbolt/pci.c:479
 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332
 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
 bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
 pci_add_dynid+0x2b5/0x370 drivers/pci/pci-driver.c:77
 new_id_store+0x2a9/0x5b0 drivers/pci/pci-driver.c:249
 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f77de6a8eb7
Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc5b704f00 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000555567013400 RCX: 00007f77de6a8eb7
RDX: 0000000000000009 RSI: 00007ffc5b704fa0 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc5b704fa0
R13: 0000000000008086 R14: 000000000000100e R15: 0000555567015903
 </TASK>
Modules linked in:
CR2: ffffc90003b39640
---[ end trace 0000000000000000 ]---
RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:ioread32+0x87/0xc0 lib/iomap.c:99
Code: 2d ee e9 59 0a 31 ff 89 ee e8 d5 b6 e3 fc 85 ed 75 28 e8 5c bc e3 fc bb ff ff ff ff 89 d8 5b 5d c3 cc cc cc cc e8 49 bc e3 fc <8b> 1b e8 42 bc e3 fc 89 d8 5b 5d e9 19 4d 97 06 e8 34 bc e3 fc 83
RSP: 0018:ffffc90003ab76f0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90003b39640 RCX: ffffffff8526b6cb
RDX: ffff88802bc42540 RSI: ffffffff8526b737 RDI: ffff88802bc42540
RBP: ffff88802efa9838 R08: 0000000000000007 R09: 000000000003ffff
R10: ffffc90003b39640 R11: 0000000000000000 R12: 1ffff92000756eed
R13: ffff8880231120d0 R14: ffff88802efa9880 R15: ffffc90003ab7788
FS:  0000555567013400(0000) GS:ffff8880d5fec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90003b39640 CR3: 00000000364fc000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	2d ee e9 59 0a       	sub    $0xa59e9ee,%eax
   5:	31 ff                	xor    %edi,%edi
   7:	89 ee                	mov    %ebp,%esi
   9:	e8 d5 b6 e3 fc       	call   0xfce3b6e3
   e:	85 ed                	test   %ebp,%ebp
  10:	75 28                	jne    0x3a
  12:	e8 5c bc e3 fc       	call   0xfce3bc73
  17:	bb ff ff ff ff       	mov    $0xffffffff,%ebx
  1c:	89 d8                	mov    %ebx,%eax
  1e:	5b                   	pop    %rbx
  1f:	5d                   	pop    %rbp
  20:	c3                   	ret
  21:	cc                   	int3
  22:	cc                   	int3
  23:	cc                   	int3
  24:	cc                   	int3
  25:	e8 49 bc e3 fc       	call   0xfce3bc73
* 2a:	8b 1b                	mov    (%rbx),%ebx <-- trapping instruction
  2c:	e8 42 bc e3 fc       	call   0xfce3bc73
  31:	89 d8                	mov    %ebx,%eax
  33:	5b                   	pop    %rbx
  34:	5d                   	pop    %rbp
  35:	e9 19 4d 97 06       	jmp    0x6974d53
  3a:	e8 34 bc e3 fc       	call   0xfce3bc73
  3f:	83                   	.byte 0x83