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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-21 23:46:14 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-04-07 15:33:17 +0200 |
| commit | 08117a40157464f8a9dcc2df393fa5fe299c1e98 (patch) | |
| tree | 0ac5d2cf186cafd222262db35e9701d07b7bd1ff /libavcodec/h264_parse.c | |
| parent | 9c7ee37490d21350ab1a2e07069284daf1943e52 (diff) | |
| download | ffmpeg-08117a40157464f8a9dcc2df393fa5fe299c1e98.tar.gz | |
avcodec/h264: Check weight values to be within the specs limits.
Fixes: integer overflows
Fixes: 911/clusterfuzz-testcase-5415105606975488
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/h264_parse.c')
| -rw-r--r-- | libavcodec/h264_parse.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libavcodec/h264_parse.c b/libavcodec/h264_parse.c index 0c873196dc..ea202e759c 100644 --- a/libavcodec/h264_parse.c +++ b/libavcodec/h264_parse.c @@ -59,6 +59,9 @@ int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps, if (luma_weight_flag) { pwt->luma_weight[i][list][0] = get_se_golomb(gb); pwt->luma_weight[i][list][1] = get_se_golomb(gb); + if ((int8_t)pwt->luma_weight[i][list][0] != pwt->luma_weight[i][list][0] || + (int8_t)pwt->luma_weight[i][list][1] != pwt->luma_weight[i][list][1]) + goto out_range_weight; if (pwt->luma_weight[i][list][0] != luma_def || pwt->luma_weight[i][list][1] != 0) { pwt->use_weight = 1; @@ -76,6 +79,9 @@ int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps, for (j = 0; j < 2; j++) { 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]) + 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; @@ -104,6 +110,9 @@ int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps, } pwt->use_weight = pwt->use_weight || pwt->use_weight_chroma; return 0; +out_range_weight: + avpriv_request_sample(logctx, "Out of range weight\n"); + return AVERROR_INVALIDDATA; } /** |