Re: Oops in hdac_hda_dev_probe (6.7-rc7)

[Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>]

Hi Takashi,

many thanks for your response. Your patch helps half-way: the oops goes
away, but so does the sound... With your patch, the decisive lines in dmesg
are:

	sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware info: version 2:2:0-57864
	sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware: ABI 3:22:1 Kernel ABI 3:23:0
	sof_sdw sof_sdw: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
	sof_sdw sof_sdw: snd_soc_register_card failed -517
	sof_sdw sof_sdw: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
	sof_sdw sof_sdw: snd_soc_register_card failed -517
	platform sof_sdw: deferred probe pending

With a revert of the a0575b4add21, it is:

	sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware info: version 2:2:0-57864
	sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware: ABI 3:22:1 Kernel ABI 3:23:0
	sof-audio-pci-intel-tgl 0000:00:1f.3: Topology: ABI 3:22:1 Kernel ABI 3:23:0
	sof_sdw sof_sdw: ASoC: Parent card not yet available, widget card binding deferred
	sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no PCM in topology for HDMI converter 3
	input: sof-soundwire HDMI/DP,pcm=5 as /devices/pci0000:00/0000:00:1f.3/sof_sdw/sound/card0/input14
	input: sof-soundwire HDMI/DP,pcm=6 as /devices/pci0000:00/0000:00:1f.3/sof_sdw/sound/card0/input15
	input: sof-soundwire HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sof_sdw/sound/card0/input16

Maybe this helps a bit further?

Best,
	Dominik

Am Fri, Dec 29, 2023 at 02:11:38PM +0100 schrieb Takashi Iwai:
> On Wed, 27 Dec 2023 08:37:07 +0100,
> Dominik Brodowski wrote:
> > 
> > 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.
> 
> As I've been (and still am) off, I had too little time for taking a
> deeper look now, unfortunately.  But my wild guess is that it's a NULL
> dereference of the hdac_hda_priv referred via hdac dev.  If it's
> correct, a oneliner like below should work around the crash.
> Could you give it a try?
> 
> 
> thanks,
> 
> Takashi
> 
> -- 8< --
> --- a/sound/soc/codecs/hdac_hda.c
> +++ b/sound/soc/codecs/hdac_hda.c
> @@ -630,7 +630,7 @@ static int hdac_hda_dev_probe(struct hdac_device *hdev)
>  	snd_hdac_ext_bus_link_get(hdev->bus, hlink);
>  
>  	/* ASoC specific initialization */
> -	if (hda_pvt->need_display_power)
> +	if (hda_pvt && hda_pvt->need_display_power)
>  		ret = devm_snd_soc_register_component(&hdev->dev,
>  						&hdac_hda_hdmi_codec, hdac_hda_hdmi_dais,
>  						ARRAY_SIZE(hdac_hda_hdmi_dais));
>