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Date: Mon, 9 Sep 2013 11:44:59 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Takashi Iwai <tiwai@...e.de>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 09/24] ALSA: hda - Fix NULL dereference with CONFIG_SND_DYNAMIC_MINORS=n 3.8.13.9 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai <tiwai@...e.de> commit 2ca320e294a738c9134a71b5029de05edbfc7aad upstream. Without the dynamic minor assignment, HDMI codec may have less PCM instances than the number of pins, which eventually leads to Oops. Reported-by: Stratos Karafotis <stratosk@...aphore.gr> Signed-off-by: Takashi Iwai <tiwai@...e.de> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- sound/pci/hda/patch_hdmi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index ad23390..5c19496 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1617,6 +1617,9 @@ static int generic_hdmi_build_controls(struct hda_codec *codec) struct snd_pcm_chmap *chmap; struct snd_kcontrol *kctl; int i; + + if (!codec->pcm_info[pin_idx].pcm) + break; err = snd_pcm_add_chmap_ctls(codec->pcm_info[pin_idx].pcm, SNDRV_PCM_STREAM_PLAYBACK, NULL, 0, pin_idx, &chmap); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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