diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-23 17:16:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-18 20:53:56 +0200 |
| commit | 2d177dba88aa23d384efd6cf206759aed6553db1 (patch) | |
| tree | c8e67ea4db77fbcafdabbfc9085e87f4a08ce5fa | |
| parent | 6f83f6de0446e02f66c0d2a5f7cd950797d26681 (diff) | |
| download | ffmpeg-2d177dba88aa23d384efd6cf206759aed6553db1.tar.gz | |
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 098314e1e5142aa2b53dc5371a9d01eb09ddd30f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/asfdec_o.c | 21 |
1 files changed, 6 insertions, 15 deletions
diff --git a/libavformat/asfdec_o.c b/libavformat/asfdec_o.c index 7c08565180..f98ffc76fa 100644 --- a/libavformat/asfdec_o.c +++ b/libavformat/asfdec_o.c @@ -685,7 +685,7 @@ 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 @@ -700,19 +700,10 @@ 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; @@ -795,7 +786,7 @@ 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: |