Oops in hdac_hda_dev_probe (6.7-rc7)

[Dominik Brodowski]

Hi,

unfortunately, the latest 6.7.0-rc7 and the two previous rc kernels cause an
oops in hdac_hda_dev_probe(); sound and resume-from-suspend subsequently do
not work:


BUG: kernel NULL pointer dereference, address: 0000000000000078
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0
P4D 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
Hardware name: Dell Inc. XPS 9315/00KRKP, BIOS 1.1.3 05/11/2022
Workqueue: events sof_probe_work

RIP: 0010:hdac_hda_dev_probe+0x42/0xf0
Code: 48 8b 37 48 8b bb c8 04 00 00 e8 09 9b 0a 00 48 85 c0 48 89 c5 0f 84 a6 00 00 00 48 8b bb c8 04 00 00 48 89 c6 e8 1e 9a 0a 00 <41> 80 7c 24 78 00 75 46 b9 03 00 00 00 48 c7 c2 c0 b2 a1 ac 48 c7
RSP: 0000:ffffc90000207b50 EFLAGS: 00010246

RAX: 0000000000000000 RBX: ffff88811495d000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888108691600 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88811400b028
FS:  0000000000000000(0000) GS:ffff88886f500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000078 CR3: 00000002b7a5a000 CR4: 0000000000f50ef0
PKRU: 55555554
Call Trace:
 <TASK>
 ? __die+0x1e/0x70
 ? page_fault_oops+0x17c/0x4b0
 ? snd_hdac_ext_bus_link_get+0x24/0xc0
 ? exc_page_fault+0x462/0x8e0
 ? asm_exc_page_fault+0x26/0x30
 ? hdac_hda_dev_probe+0x42/0xf0
 really_probe+0x166/0x300
 ? __pfx___device_attach_driver+0x10/0x10
 __driver_probe_device+0x6e/0x120
 driver_probe_device+0x1a/0x90
 __device_attach_driver+0x8e/0xd0
 bus_for_each_drv+0x90/0xf0
 __device_attach+0xac/0x1a0
 bus_probe_device+0x93/0xb0
 device_add+0x669/0x860
 snd_hdac_device_register+0x10/0x60
 hda_codec_probe_bus+0x189/0x290
 hda_dsp_probe+0x211/0x550
 sof_probe_work+0x2c/0x430
 ? process_one_work+0x19c/0x500
 process_one_work+0x205/0x500
 worker_thread+0x1dc/0x3e0

 ? __pfx_worker_thread+0x10/0x10
 kthread+0xea/0x120
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x2c/0x50
 ? __pfx_kthread+0x10/0x10
 ret_from_fork_asm+0x1b/0x30
 </TASK>
Modules linked in:
CR2: 0000000000000078
---[ end trace 0000000000000000 ]---
RIP: 0010:hdac_hda_dev_probe+0x42/0xf0
Code: 48 8b 37 48 8b bb c8 04 00 00 e8 09 9b 0a 00 48 85 c0 48 89 c5 0f 84 a6 00 00 00 48 8b bb c8 04 00 00 48 89 c6 e8 1e 9a 0a 00 <41> 80 7c 24 78 00 75 46 b9 03 00 00 00 48 c7 c2 c0 b2 a1 ac 48 c7
RSP: 0000:ffffc90000207b50 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88811495d000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888108691600 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88811400b028
FS:  0000000000000000(0000) GS:ffff88886f500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000078 CR3: 00000002b7a5a000 CR4: 0000000000f50ef0
PKRU: 55555554
note: kworker/2:0[24] exited with irqs disabled


I was able to bisect the issue to commit a0575b4add21 ("ASoC: hdac_hda:
Conditionally register dais for HDMI and Analog"). Reverting that patch on
top of mainline fixes it.

Best,
	Dominik