ALSA: Use scnprintf() instead of snprintf() for show

The show() method should use scnprintf() not snprintf() because snprintf()
may returns a value that exceeds its second argument.

Signed-off-by: Jaejoong Kim <climbbb.kim@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/init.c b/sound/core/init.c
index 4fa5dd9..79b4df1 100644 (file)
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -670,7 +670,7 @@ card_id_show_attr(struct device *dev,
                  struct device_attribute *attr, char *buf)
 {
        struct snd_card *card = container_of(dev, struct snd_card, card_dev);
-       return snprintf(buf, PAGE_SIZE, "%s\n", card->id);
+       return scnprintf(buf, PAGE_SIZE, "%s\n", card->id);
 }
 
 static ssize_t
@@ -710,7 +710,7 @@ card_number_show_attr(struct device *dev,
                     struct device_attribute *attr, char *buf)
 {
        struct snd_card *card = container_of(dev, struct snd_card, card_dev);
-       return snprintf(buf, PAGE_SIZE, "%i\n", card->number);
+       return scnprintf(buf, PAGE_SIZE, "%i\n", card->number);
 }
 
 static DEVICE_ATTR(number, S_IRUGO, card_number_show_attr, NULL);