6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Geoffrey D. Bennett <g@xxxxx>
[ Upstream commit 04f8f053252b86c7583895c962d66747ecdc61b7 ]
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")
Link: https://lore.kernel.org/r/3b19fb3da641b587749b85fe1daa1b4e696c0c1b.1703001053.git.g@xxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/usb/mixer_scarlett_gen2.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c
index 087e120d7103..c04cff722541 100644
--- a/sound/usb/mixer_scarlett_gen2.c
+++ b/sound/usb/mixer_scarlett_gen2.c
@@ -3361,7 +3361,8 @@ 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
