ALSA: hda - Read buffer overflow

Check whether index is within bounds before testing the element.

Signed-off-by: Roel Kluin <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/hda/patch_realtek.c

···
 
 	/* 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;