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avformat/asfdec_o: Use ff_get_extradata() 

Fixes: OOM
Fixes: 27240/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_O_fuzzer-5937469859823616

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 098314e1e5)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-23 17:16:20 +02:00
parent 588c22d057
commit c1d8652b5b
1 changed files with 6 additions and 15 deletions
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21
libavformat/asfdec_o.c
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@ -694,7 +694,7 @@ static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
return 0;
}
static int parse_video_info(AVIOContext *pb, AVStream *st)
static int parse_video_info(AVFormatContext *avfmt, AVIOContext *pb, AVStream *st)
{
uint16_t size_asf; // ASF-specific Format Data size
uint32_t size_bmp; // BMP_HEADER-specific Format Data size
@ -709,19 +709,10 @@ static int parse_video_info(AVIOContext *pb, AVStream *st)
st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
size_bmp = FFMAX(size_asf, size_bmp);
if (size_bmp > BMP_HEADER_SIZE &&
size_bmp < INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
int ret;
st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE;
if (!(st->codecpar->extradata = av_malloc(st->codecpar->extradata_size +
AV_INPUT_BUFFER_PADDING_SIZE))) {
st->codecpar->extradata_size = 0;
return AVERROR(ENOMEM);
}
memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
AV_INPUT_BUFFER_PADDING_SIZE);
if ((ret = avio_read(pb, st->codecpar->extradata,
st->codecpar->extradata_size)) < 0)
if (size_bmp > BMP_HEADER_SIZE) {
int ret = ff_get_extradata(avfmt, st->codecpar, pb, size_bmp - BMP_HEADER_SIZE);
if (ret < 0)
return ret;
}
return 0;
@ -802,7 +793,7 @@ static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *
break;
case AVMEDIA_TYPE_VIDEO:
asf_st->type = AVMEDIA_TYPE_VIDEO;
if ((ret = parse_video_info(pb, st)) < 0)
if ((ret = parse_video_info(s, pb, st)) < 0)
return ret;
break;
default: