From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens-P6GI/4k7KOmELgA04lAiVw@public.gmane.org>
Subject: Re: [LAU] kernel crashes with jackd (with Dell Precision M6600's
 integrated Intel HDA sound)
Date: Mon, 19 Dec 2011 12:13:34 +0100
Message-ID: <4EEF1C5E.4070002@ladisch.de>
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To: Csillag Kristof <csillag.kristof-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Takashi Iwai <tiwai-l3A5Bk7waGM@public.gmane.org>
Cc: linux-audio-user-cunTk1MwBs/CEJeg2xFRV2D2FQJk+8+b@public.gmane.org, alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org
List-Id: alsa-devel@alsa-project.org

Csillag Kristof wrote:
> Lately, when experimenting with JACK, I began getting kernel crashes :(
>
> I am using stock Debian kernel v3.1.5.
>
> [ 7555.763914] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
> [ 7555.763952] IP: [<ffffffffa08ca7b8>] setup_bdle.isra.21+0x44/0xd9 [snd_hda_intel]
> [ 7555.764735] RAX: 0000000000000000 RBX: ffff880221825e00 RCX: 0000000000000000
> [ 7555.765126] Call Trace:
> [ 7555.765170]  [<ffffffffa08caa5c>] ? azx_pcm_prepare+0x20f/0x3c7 [snd_hda_intel]
> [ 7555.765589] Code: 8b 32 e9 94 00 00 00 81 7d 00 ff 00 00 00 0f 87 96 00 00 00 48 8b 83 c0 00 00 00 44 89 e2 44 89 e6 48 89 df 48 8b 80 d8 02 00 00
> [ 7555.765683]  8b 48 28 48 89 d0 81 e2 ff 0f 00 00 48 c1 e8 0c 48 c1 e0 04

   7:   81 7d 00 ff 00 00 00    cmpl   $0xff,0x0(%rbp)
   e:   0f 87 96 00 00 00       ja     aa
  14:   48 8b 83 c0 00 00 00    mov    0xc0(%rbx),%rax
  1b:   44 89 e2                mov    %r12d,%edx
  1e:   44 89 e6                mov    %r12d,%esi
  21:   48 89 df                mov    %rbx,%rdi
  24:   48 8b 80 d8 02 00 00    mov    0x2d8(%rax),%rax
  2b:   ?? 8b 48 28             mov    0x28(%rax),%r??  <-- crash here
  2f:   48 89 d0                mov    %rdx,%rax
  32:   81 e2 ff 0f 00 00       and    $0xfff,%edx
  38:   48 c1 e8 0c             shr    $0xc,%rax
  3c:   48 c1 e0 04             shl    $0x4,%rax

substream->runtime->dma_buffer_p is NULL.

> https://bugzilla.redhat.com/show_bug.cgi?id=702056
> https://bugzilla.redhat.com/show_bug.cgi?id=718056
> https://bugzilla.redhat.com/show_bug.cgi?id=749186

Same bug.


Regards,
Clemens