diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 5699a62d1767..34ded71cb807 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -2023,6 +2023,13 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
 		bmaControls = ftr->bmaControls;
 	}
 
+	if (channels > 32) {
+		usb_audio_info(state->chip,
+			       "usbmixer: too many channels (%d) in unit %d\n",
+			       channels, unitid);
+		return -EINVAL;
+	}
+
 	/* parse the source unit */
 	err = parse_audio_unit(state, hdr->bSourceID);
 	if (err < 0)