[syzbot] [sound?] BUG: unable to handle kernel paging request in azx_probe_work

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14d38bb9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782
dashboard link: https://syzkaller.appspot.com/bug?extid=5ebe7cd17e48b4293660
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1671be32580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12d38bb9580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-848acc8f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6fb497cc0c8d/vmlinux-848acc8f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/663ccee34982/bzImage-848acc8f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5ebe7c...@syzkaller.appspotmail.com

BUG: unable to handle page fault for address: 000000000001c0a0
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5806 Comm: kworker/1:4 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
Workqueue: events azx_probe_work
RIP: 0010:readw arch/x86/include/asm/io.h:58 [inline]
RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:458 [inline]
RIP: 0010:azx_first_init sound/hda/controllers/intel.c:1953 [inline]
RIP: 0010:azx_probe_continue sound/hda/controllers/intel.c:2365 [inline]
RIP: 0010:azx_probe_work+0xa44/0x2640 sound/hda/controllers/intel.c:1737
Code: 4c 89 f7 e8 9e 3a dd fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 61 1a 00 00 48 8b 85 68 f7 ff ff <66> 44 8b 28 45 89 ef 0f 1f 44 00 00 e8 7b 9e 8a f8 48 8b 54 24 40
RSP: 0018:ffffc90003137b00 EFLAGS: 00010246
RAX: 000000000001c0a0 RBX: ffff88802d5d8058 RCX: 0000000000000000
RDX: 1ffff11005abb00b RSI: ffffffff855cfff2 RDI: 0000000000000001
RBP: ffff88802d5d88f0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88802e0b04c4 R14: ffff888022f3c000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c0a0 CR3: 000000003f65b000 CR4: 0000000000352ef0
Call Trace:
<TASK>
process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
CR2: 000000000001c0a0
---[ end trace 0000000000000000 ]---
RIP: 0010:readw arch/x86/include/asm/io.h:58 [inline]
RIP: 0010:snd_hdac_reg_readw include/sound/hdaudio.h:458 [inline]
RIP: 0010:azx_first_init sound/hda/controllers/intel.c:1953 [inline]
RIP: 0010:azx_probe_continue sound/hda/controllers/intel.c:2365 [inline]
RIP: 0010:azx_probe_work+0xa44/0x2640 sound/hda/controllers/intel.c:1737
Code: 4c 89 f7 e8 9e 3a dd fb 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 61 1a 00 00 48 8b 85 68 f7 ff ff <66> 44 8b 28 45 89 ef 0f 1f 44 00 00 e8 7b 9e 8a f8 48 8b 54 24 40
RSP: 0018:ffffc90003137b00 EFLAGS: 00010246
RAX: 000000000001c0a0 RBX: ffff88802d5d8058 RCX: 0000000000000000
RDX: 1ffff11005abb00b RSI: ffffffff855cfff2 RDI: 0000000000000001
RBP: ffff88802d5d88f0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88802e0b04c4 R14: ffff888022f3c000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c0a0 CR3: 000000003f65b000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
0: 4c 89 f7 mov %r14,%rdi
3: e8 9e 3a dd fb call 0xfbdd3aa6
8: 48 89 da mov %rbx,%rdx
b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
12: fc ff df
15: 48 c1 ea 03 shr $0x3,%rdx
19: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
1d: 0f 85 61 1a 00 00 jne 0x1a84
23: 48 8b 85 68 f7 ff ff mov -0x898(%rbp),%rax
* 2a: 66 44 8b 28 mov (%rax),%r13w <-- trapping instruction
2e: 45 89 ef mov %r13d,%r15d
31: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
36: e8 7b 9e 8a f8 call 0xf88a9eb6
3b: 48 8b 54 24 40 mov 0x40(%rsp),%rdx


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