From: Dan Carpenter <dan.carpenter@oracle.com>
To: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.de>, Bill Pemberton <wfp5p@virginia.edu>,
Lars-Peter Clausen <lars@metafoo.de>,
Sachin Kamat <sachin.kamat@linaro.org>,
alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org
Subject: [patch] ASoC: 88pm860x: array overflow in snd_soc_put_volsw_2r_st()
Date: Fri, 13 Sep 2013 10:52:49 +0300 [thread overview]
Message-ID: <20130913075248.GC19211@elgon.mountain> (raw)
This is called from snd_ctl_elem_write() with user supplied data so we
need to add some bounds checking.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/sound/soc/codecs/88pm860x-codec.c b/sound/soc/codecs/88pm860x-codec.c
index 8af0434..259d1ac 100644
--- a/sound/soc/codecs/88pm860x-codec.c
+++ b/sound/soc/codecs/88pm860x-codec.c
@@ -349,6 +349,9 @@ static int snd_soc_put_volsw_2r_st(struct snd_kcontrol *kcontrol,
val = ucontrol->value.integer.value[0];
val2 = ucontrol->value.integer.value[1];
+ if (val >= ARRAY_SIZE(st_table) || val2 >= ARRAY_SIZE(st_table))
+ return -EINVAL;
+
err = snd_soc_update_bits(codec, reg, 0x3f, st_table[val].m);
if (err < 0)
return err;
next reply other threads:[~2013-09-13 7:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-13 7:52 Dan Carpenter [this message]
2013-09-13 17:34 ` [patch] ASoC: 88pm860x: array overflow in snd_soc_put_volsw_2r_st() Mark Brown
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