Index: libavcodec/ac3dec.c
===================================================================
--- libs/libavcodec/ac3dec.c
+++ libs/libavcodec/ac3dec.c
@@ -37,6 +37,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 #include "random.h"
+#include "crc.h"
 
 /**
  * Table of bin locations for rematrixing bands
@@ -1121,6 +1122,12 @@
         return -1;
     }
 
+    if (av_crc(av_crc8005, 0, buf + 2, buf_size - 2)) {
+        av_log(avctx, AV_LOG_ERROR, "CRC error\n");
+        *data_size = 0;
+        return buf_size;
+    }
+
     avctx->sample_rate = ctx->sampling_rate;
     avctx->bit_rate = ctx->bit_rate;