avcodec/rv34: Fix runtime error: signed integer overflow: -2 + -2147483648 cannot...
authorMichael Niedermayer <michael@niedermayer.cc>
Tue, 21 Feb 2017 23:42:23 +0000 (00:42 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Wed, 22 Feb 2017 01:42:48 +0000 (02:42 +0100)
Fixes: 642/clusterfuzz-testcase-558358808074649

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/rv34.c

index aca8382..f1c93cf 100644 (file)
@@ -866,6 +866,11 @@ static int rv34_decode_mv(RV34DecContext *r, int block_type)
     for(i = 0; i < num_mvs[block_type]; i++){
         r->dmv[i][0] = get_interleaved_se_golomb(gb);
         r->dmv[i][1] = get_interleaved_se_golomb(gb);
+        if (r->dmv[i][0] == INVALID_VLC ||
+            r->dmv[i][1] == INVALID_VLC) {
+            r->dmv[i][0] = r->dmv[i][1] = 0;
+            return AVERROR_INVALIDDATA;
+        }
     }
     switch(block_type){
     case RV34_MB_TYPE_INTRA: