BUG: unable to handle page fault for address: 000000000001c000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 2ecf8067 P4D 2ecf8067 PUD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4371 Comm: kworker/0:8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events azx_probe_work
RIP: 0010:readw arch/x86/include/asm/io.h:60 [inline]
RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:449 [inline]
RIP: 0010:azx_first_init sound/pci/hda/hda_intel.c:1924 [inline]
RIP: 0010:azx_probe_continue+0xcbd/0x26a0 sound/pci/hda/hda_intel.c:2342
Code: 80 20 f7 48 8b 7c 24 08 e8 50 f8 2c fc 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 08 4c 89 ff e8 76 a8 ba f9 49 8b 07 <66> 44 8b 28 0f 1f 44 00 00 e8 a5 7b 69 f9 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000476fba0 EFLAGS: 00010246
RAX: 000000000001c000 RBX: ffff888073270028 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: 00000000ffffffff
RBP: ffff8880732707a8 R08: ffffffff90b1037f R09: 1ffffffff216206f
R10: dffffc0000000000 R11: fffffbfff2162070 R12: dffffc0000000000
R13: 1ffff1100e64e009 R14: 00000000ffffffea R15: ffff888073270048
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c000 CR3: 000000005b744000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 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: 000000000001c000
---[ end trace 0000000000000000 ]---
RIP: 0010:readw arch/x86/include/asm/io.h:60 [inline]
RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:449 [inline]
RIP: 0010:azx_first_init sound/pci/hda/hda_intel.c:1924 [inline]
RIP: 0010:azx_probe_continue+0xcbd/0x26a0 sound/pci/hda/hda_intel.c:2342
Code: 80 20 f7 48 8b 7c 24 08 e8 50 f8 2c fc 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 08 4c 89 ff e8 76 a8 ba f9 49 8b 07 <66> 44 8b 28 0f 1f 44 00 00 e8 a5 7b 69 f9 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000476fba0 EFLAGS: 00010246
RAX: 000000000001c000 RBX: ffff888073270028 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: 00000000ffffffff
RBP: ffff8880732707a8 R08: ffffffff90b1037f R09: 1ffffffff216206f
R10: dffffc0000000000 R11: fffffbfff2162070 R12: dffffc0000000000
R13: 1ffff1100e64e009 R14: 00000000ffffffea R15: ffff888073270048
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c000 CR3: 000000005b744000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	80 20 f7             	andb   $0xf7,(%rax)
   3:	48 8b 7c 24 08       	mov    0x8(%rsp),%rdi
   8:	e8 50 f8 2c fc       	call   0xfc2cf85d
   d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  14:	fc ff df
  17:	41 80 7c 05 00 00    	cmpb   $0x0,0x0(%r13,%rax,1)
  1d:	74 08                	je     0x27
  1f:	4c 89 ff             	mov    %r15,%rdi
  22:	e8 76 a8 ba f9       	call   0xf9baa89d
  27:	49 8b 07             	mov    (%r15),%rax
* 2a:	66 44 8b 28          	mov    (%rax),%r13w <-- trapping instruction
  2e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  33:	e8 a5 7b 69 f9       	call   0xf9697bdd
  38:	48                   	rex.W
  39:	b8 00 00 00 00       	mov    $0x0,%eax
  3e:	00 fc                	add    %bh,%ah