[ALSA] powermac - Check value range in ctl callbacks
Check the value ranges in ctl put callbacks properly in snd-powermac
driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/ppc/burgundy.c b/sound/ppc/burgundy.c
index e02263f..fec74e8 100644
--- a/sound/ppc/burgundy.c
+++ b/sound/ppc/burgundy.c
@@ -136,6 +136,9 @@
{
int hardvolume, lvolume, rvolume;
+ if (volume[0] < 0 || volume[0] > 100 ||
+ volume[1] < 0 || volume[1] > 100)
+ return; /* -EINVAL */
lvolume = volume[0] ? volume[0] + BURGUNDY_VOLUME_OFFSET : 0;
rvolume = volume[1] ? volume[1] + BURGUNDY_VOLUME_OFFSET : 0;
@@ -301,14 +304,14 @@
struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
unsigned int addr = BASE2ADDR(kcontrol->private_value & 0xff);
int stereo = (kcontrol->private_value >> 24) & 1;
- int oval, val;
+ unsigned int oval, val;
oval = ~snd_pmac_burgundy_rcb(chip, addr) & 0xff;
- val = ucontrol->value.integer.value[0];
+ val = ucontrol->value.integer.value[0] & 15;
if (stereo)
- val |= ucontrol->value.integer.value[1] << 4;
+ val |= (ucontrol->value.integer.value[1] & 15) << 4;
else
- val |= ucontrol->value.integer.value[0] << 4;
+ val |= val << 4;
val = ~val & 0xff;
snd_pmac_burgundy_wcb(chip, addr, val);
return val != oval;