diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index 7283f0f18813..0e51ae769e50 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -1017,6 +1017,9 @@ static int snd_dummy_probe(struct platform_device *devptr)
 	int idx, err;
 	int dev = devptr->id;
 
+	if (dev < 0 || dev >= SNDRV_CARDS)
+		return -EINVAL;
+
 	err = snd_devm_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
 				sizeof(struct snd_dummy), &card);
 	if (err < 0)