diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index cf296decefef..f2058eb71fc8 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -3080,6 +3080,8 @@ static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer,
 	int i;
 
 	assoc = usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
+	if (!assoc)
+		return -EINVAL;
 
 	/* Detect BADD capture/playback channels from AS EP descriptors */
 	for (i = 0; i < assoc->bInterfaceCount; i++) {