Merge commit '0679cec6e8802643bbe6d5f68ca1110a7d3171da'

* commit '0679cec6e8802643bbe6d5f68ca1110a7d3171da':
  smacker: Make sure we don't fill in huffman codes out of range

Conflicts:
	libavcodec/smacker.c

See: 1285baaab5
the added test is redundant but will be used after future refactoring

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/smacker.c

@@ -284,6 +284,12 @@ static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int
         av_log(smk->avctx, AV_LOG_ERROR, "bigtree damaged\n");
         return AVERROR_INVALIDDATA;
     }
+    if (ctx.last[0] >= huff.length ||
+        ctx.last[1] >= huff.length ||
+        ctx.last[2] >= huff.length) {
+        av_log(smk->avctx, AV_LOG_ERROR, "Huffman codes out of range\n");
+        err = AVERROR_INVALIDDATA;
+    }
 
     *recodes = huff.values;