ALSA: hda - Read buffer overflow

Check whether index is within bounds before testing the element.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index f6b4cbf..51c44fd 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -559,7 +559,7 @@ static int alc_pin_mode_get(struct snd_kcontrol *kcontrol,
 
        /* Find enumerated value for current pinctl setting */
        i = alc_pin_mode_min(dir);
-       while (alc_pin_mode_values[i] != pinctl && i <= alc_pin_mode_max(dir))
+       while (i <= alc_pin_mode_max(dir) && alc_pin_mode_values[i] != pinctl)
                i++;
        *valp = i <= alc_pin_mode_max(dir) ? i: alc_pin_mode_min(dir);
        return 0;