avcodec/h264_parse: Clear invalid chroma weights in ff_h264_pred_weight_table()
authorMichael Niedermayer <michael@niedermayer.cc>
Sun, 18 Feb 2018 16:12:28 +0000 (17:12 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Tue, 20 Feb 2018 14:27:51 +0000 (15:27 +0100)
Fixes: 6037/clusterfuzz-testcase-minimized-5030249784934400
Fixes: signed integer overflow: 256 * 16992036 cannot be represented in type 'int'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/h264_parse.c

index 6cbef5a..87e5b3c 100644 (file)
@@ -82,8 +82,11 @@ int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps,
                         pwt->chroma_weight[i][list][j][0] = get_se_golomb(gb);
                         pwt->chroma_weight[i][list][j][1] = get_se_golomb(gb);
                         if ((int8_t)pwt->chroma_weight[i][list][j][0] != pwt->chroma_weight[i][list][j][0] ||
-                            (int8_t)pwt->chroma_weight[i][list][j][1] != pwt->chroma_weight[i][list][j][1])
+                            (int8_t)pwt->chroma_weight[i][list][j][1] != pwt->chroma_weight[i][list][j][1]) {
+                            pwt->chroma_weight[i][list][j][0] = chroma_def;
+                            pwt->chroma_weight[i][list][j][1] = 0;
                             goto out_range_weight;
+                        }
                         if (pwt->chroma_weight[i][list][j][0] != chroma_def ||
                             pwt->chroma_weight[i][list][j][1] != 0) {
                             pwt->use_weight_chroma        = 1;