linux-kernel - [ 36/37] ALSA: ac97 - Fix missing NULL check in snd_ac97_cvol

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Message-Id: <20121019031308.665359998@linuxfoundation.org>
Date:	Thu, 18 Oct 2012 20:16:59 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Takashi Iwai <tiwai@...e.de>
Subject: [ 36/37] ALSA: ac97 - Fix missing NULL check in snd_ac97_cvol_new()

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@...e.de>

commit 733a48e5ae5bf28b046fad984d458c747cbb8c21 upstream.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=44721

Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/pci/ac97/ac97_codec.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1271,6 +1271,8 @@ static int snd_ac97_cvol_new(struct snd_
 		tmp.index = ac97->num;
 		kctl = snd_ctl_new1(&tmp, ac97);
 	}
+	if (!kctl)
+		return -ENOMEM;
 	if (reg >= AC97_PHONE && reg <= AC97_PCM)
 		set_tlv_db_scale(kctl, db_scale_5bit_12db_max);
 	else


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