BUG: unable to handle page fault for address: 000000000001c008
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events work_for_cpu_fn
RIP: 0010:readb arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:ioat_pci_probe+0xa4/0x410 drivers/dma/ioat/init.c:1364
Code: 48 85 c0 74 4c 49 89 c7 48 b8 00 00 00 00 00 fc ff df 4c 89 fb 48 c1 eb 03 80 3c 03 00 74 08 4c 89 ff e8 8f 02 62 fd 49 8b 07 <44> 8a 60 08 41 0f b6 ec bf 30 00 00 00 89 ee e8 18 d8 10 fd 41 80
RSP: 0018:ffffc90000137b98 EFLAGS: 00010246
RAX: 000000000001c000 RBX: 1ffff110053a7b95 RCX: ffff88813fef1e00
RDX: 0000000000000000 RSI: ffffffff8a8c17a0 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffffffff90b1028f R09: 1ffffffff2162051
R10: dffffc0000000000 R11: fffffbfff2162052 R12: ffff8881436b2000
R13: 0000000000000000 R14: ffff8881436b2000 R15: ffff888029d3dca8
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c008 CR3: 0000000023fa4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 local_pci_probe+0xc5/0x150 drivers/pci/pci-driver.c:324
 work_for_cpu_fn+0x50/0x80 kernel/workqueue.c:5184
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
CR2: 000000000001c008
---[ end trace 0000000000000000 ]---
RIP: 0010:readb arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:ioat_pci_probe+0xa4/0x410 drivers/dma/ioat/init.c:1364
Code: 48 85 c0 74 4c 49 89 c7 48 b8 00 00 00 00 00 fc ff df 4c 89 fb 48 c1 eb 03 80 3c 03 00 74 08 4c 89 ff e8 8f 02 62 fd 49 8b 07 <44> 8a 60 08 41 0f b6 ec bf 30 00 00 00 89 ee e8 18 d8 10 fd 41 80
RSP: 0018:ffffc90000137b98 EFLAGS: 00010246
RAX: 000000000001c000 RBX: 1ffff110053a7b95 RCX: ffff88813fef1e00
RDX: 0000000000000000 RSI: ffffffff8a8c17a0 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffffffff90b1028f R09: 1ffffffff2162051
R10: dffffc0000000000 R11: fffffbfff2162052 R12: ffff8881436b2000
R13: 0000000000000000 R14: ffff8881436b2000 R15: ffff888029d3dca8
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c008 CR3: 0000000023fa4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 85 c0             	test   %rax,%rax
   3:	74 4c                	je     0x51
   5:	49 89 c7             	mov    %rax,%r15
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df
  12:	4c 89 fb             	mov    %r15,%rbx
  15:	48 c1 eb 03          	shr    $0x3,%rbx
  19:	80 3c 03 00          	cmpb   $0x0,(%rbx,%rax,1)
  1d:	74 08                	je     0x27
  1f:	4c 89 ff             	mov    %r15,%rdi
  22:	e8 8f 02 62 fd       	call   0xfd6202b6
  27:	49 8b 07             	mov    (%r15),%rax
* 2a:	44 8a 60 08          	mov    0x8(%rax),%r12b <-- trapping instruction
  2e:	41 0f b6 ec          	movzbl %r12b,%ebp
  32:	bf 30 00 00 00       	mov    $0x30,%edi
  37:	89 ee                	mov    %ebp,%esi
  39:	e8 18 d8 10 fd       	call   0xfd10d856
  3e:	41                   	rex.B
  3f:	80                   	.byte 0x80