diff --git a/libavcodec/eatgq.c b/libavcodec/eatgq.c
index 3596d00e6f..efcad62df1 100644
--- a/libavcodec/eatgq.c
+++ b/libavcodec/eatgq.c
@@ -209,7 +209,8 @@ static int tgq_decode_mb(TgqContext *s, GetByteContext *gbyte,
             dc[4] = bytestream2_get_byte(gbyte);
             dc[5] = bytestream2_get_byte(gbyte);
         } else if (mode == 6) {
-            bytestream2_get_buffer(gbyte, dc, 6);
+            if (bytestream2_get_buffer(gbyte, dc, 6) != 6)
+                return AVERROR_INVALIDDATA;
         } else if (mode == 12) {
             for (i = 0; i < 6; i++) {
                 dc[i] = bytestream2_get_byte(gbyte);