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avcodec/dvbsubdec: Use ff_set_dimensions() 

Fixes: signed integer overflow: 65313 * 65313 cannot be represented in type 'int'
Fixes: 15740/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DVBSUB_fuzzer-5641749164195840

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-07-20 00:07:59 +02:00
parent 65bac4a782
commit 5941b7f615
1 changed files with 3 additions and 2 deletions
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5
libavcodec/dvbsubdec.c
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@ -1578,8 +1578,9 @@ static int dvbsub_parse_display_definition_segment(AVCodecContext *avctx,
display_def->width = bytestream_get_be16(&buf) + 1;
display_def->height = bytestream_get_be16(&buf) + 1;
if (!avctx->width || !avctx->height) {
avctx->width = display_def->width;
avctx->height = display_def->height;
int ret = ff_set_dimensions(avctx, display_def->width, display_def->height);
if (ret < 0)
return ret;
}
if (info_byte & 1<<3) { // display_window_flag