[alsa-devel] [patch] ALSA: ak4xx-adda: info leak in ak4xxx_capture_source_info()

[Dan Carpenter]

"idx" is controled by the user and can be a negative offset into the
input_names[] array.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/sound/i2c/other/ak4xxx-adda.c b/sound/i2c/other/ak4xxx-adda.c
index cef813d2..ed726d1 100644
--- a/sound/i2c/other/ak4xxx-adda.c
+++ b/sound/i2c/other/ak4xxx-adda.c
@@ -571,7 +571,7 @@ static int ak4xxx_capture_source_info(struct snd_kcontrol *kcontrol,
 	struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
 	int mixer_ch = AK_GET_SHIFT(kcontrol->private_value);
 	const char **input_names;
-	int  num_names, idx;
+	unsigned int num_names, idx;
 
 	num_names = ak4xxx_capture_num_inputs(ak, mixer_ch);
 	if (!num_names)