This is a note to let you know that I've just added the patch titled
ALSA: scarlett2: Add clamp() in scarlett2_mixer_ctl_put()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-scarlett2-add-clamp-in-scarlett2_mixer_ctl_put.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2e8473b579d6aafba7ecc476e1edd55e42dc1982
Author: Geoffrey D. Bennett <g@xxxxx>
Date: Wed Dec 20 04:07:52 2023 +1030
ALSA: scarlett2: Add clamp() in scarlett2_mixer_ctl_put()
[ 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>
diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c
index 9302f45b62ac..0a9025e3c867 100644
--- a/sound/usb/mixer_scarlett_gen2.c
+++ b/sound/usb/mixer_scarlett_gen2.c
@@ -3237,7 +3237,8 @@ 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;
