Ensure the value passed to scarlett2_mixer_ctl_put() is between 0 and
SCARLETT2_MIXER_MAX_VALUE so we don't attempt to access outside
scarlett2_mixer_values[].
Signed-off-by: Geoffrey D. Bennett <g@xxxxx>
Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface")
---
sound/usb/mixer_scarlett2.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/usb/mixer_scarlett2.c b/sound/usb/mixer_scarlett2.c
index 373911937487..f1636a1614da 100644
--- a/sound/usb/mixer_scarlett2.c
+++ b/sound/usb/mixer_scarlett2.c
@@ -3663,7 +3663,8 @@ static int scarlett2_mixer_ctl_put(struct snd_kcontrol *kctl,
mutex_lock(&private->data_mutex);
oval = private->mix[index];
- val = ucontrol->value.integer.value[0];
+ val = clamp(ucontrol->value.integer.value[0],
+ 0L, (long)SCARLETT2_MIXER_MAX_VALUE);
num_mixer_in = port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_OUT];
mix_num = index / num_mixer_in;
--
2.43.0
