Re: unable to handle kernel NULL pointer dereference at usb_audio_probe

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Ok looks like this fixed the dmesg bug report, and the hardware does
now show up in relevant software, but it does not actually work.
arecord reports this

$ arecord -f cd -D plughw:2,0 -d 20 test.wav
arecord: main:722: audio open error: No such device

Which does make sense if the extra NULL check in the patch now never
passes, media_snd_device_create is never reached.

On Thu, Mar 24, 2016 at 1:45 PM, Greg KH <greg@xxxxxxxxx> wrote:
> On Thu, Mar 24, 2016 at 01:34:32PM +0000, Ian T. Jacobsen wrote:
>> [   21.434822] BUG: unable to handle kernel NULL pointer dereference at
>> 0000000000000014 [   21.435516] IP: [<ffffffffc0392a4a>]
>> usb_audio_probe+0x2ca/0x9a0 [snd_usb_audio]
>>
>> I have a PreSonus AudioBox iTwo causing this issue.
>> I updated from torvalds git yesterday
>
> A patch has been sent to the sound mailing list for this:
>         http://lkml.kernel.org/g/1458045306-4170-1-git-send-email-nicstange@xxxxxxxxx
>
> It solved the issue for me, please let the developers of it know if it
> didn't work for you.
>
> thanks,
>
> greg k-h
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