ALSA: ak4xx-adda: info leak in ak4xxx_capture_source_info()
commit bd5fe738e388ceaa32e5171481e0d3ec59f0ccfe upstream.
"idx" is controled by the user and can be a negative offset into the
input_names[] array.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/sound/i2c/other/ak4xxx-adda.c b/sound/i2c/other/ak4xxx-adda.c
index cef813d..ed726d1 100644
--- a/sound/i2c/other/ak4xxx-adda.c
+++ b/sound/i2c/other/ak4xxx-adda.c
@@ -571,7 +571,7 @@
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)