5.15-stable review patch. If anyone has any objections, please let me know.
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From: Geoffrey D. Bennett g@b4.vu
[ 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@b4.vu Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface") Link: https://lore.kernel.org/r/3b19fb3da641b587749b85fe1daa1b4e696c0c1b.170300105... Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- 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 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;