[ALSA] pci - check value range in ctl callbacks

[safe/jmp/linux-2.6] / sound / pci / ymfpci / ymfpci_main.c

diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 1fe39ed..c0789a5 100644 (file)
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -1735,6 +1735,10 @@ static int snd_ymfpci_pcm_vol_put(struct snd_kcontrol *kcontrol,
            ucontrol->value.integer.value[1] != chip->pcm_mixer[subs].right) {
                chip->pcm_mixer[subs].left = ucontrol->value.integer.value[0];
                chip->pcm_mixer[subs].right = ucontrol->value.integer.value[1];
+               if (chip->pcm_mixer[subs].left > 0x8000)
+                       chip->pcm_mixer[subs].left = 0x8000;
+               if (chip->pcm_mixer[subs].right > 0x8000)
+                       chip->pcm_mixer[subs].right = 0x8000;
 
                substream = (struct snd_pcm_substream *)kcontrol->private_value;
                spin_lock_irqsave(&chip->voice_lock, flags);