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Code Issues Releases Activity

avformat/asfdec_o: Use ff_get_extradata()

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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 aee30a18c7
commit 04abdd5154
1 changed files with 6 additions and 15 deletions
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21
libavformat/asfdec_o.c
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@ -684,7 +684,7 @@ static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
return 0; 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 uint16_t size_asf; // ASF-specific Format Data size
uint32_t size_bmp; // BMP_HEADER-specific Format Data size uint32_t size_bmp; // BMP_HEADER-specific Format Data size
@ -699,19 +699,10 @@ static int parse_video_info(AVIOContext *pb, AVStream *st)
st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag); st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
size_bmp = FFMAX(size_asf, size_bmp); size_bmp = FFMAX(size_asf, size_bmp);
if (size_bmp > BMP_HEADER_SIZE && if (size_bmp > BMP_HEADER_SIZE) {
size_bmp < INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) { int ret = ff_get_extradata(avfmt, st->codecpar, pb, size_bmp - BMP_HEADER_SIZE);
int ret;
st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE; if (ret < 0)
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)
return ret; return ret;
} }
return 0; return 0;
@ -792,7 +783,7 @@ static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *
break; break;
case AVMEDIA_TYPE_VIDEO: case AVMEDIA_TYPE_VIDEO:
asf_st->type = 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; return ret;
break; break;
default: default: