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avformat/mvdec: Allocate extradata only once

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Fixes: memleak
Fixes: 28686/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5822961932173312

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-02 00:36:39 +01:00
parent 1a549efefb
commit c35e456f54
1 changed files with 6 additions and 4 deletions
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10
libavformat/mvdec.c
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@ -213,10 +213,12 @@ static int parse_video_var(AVFormatContext *avctx, AVStream *st,
st->codecpar->width = var_read_int(pb, size);
} else if (!strcmp(name, "ORIENTATION")) {
if (var_read_int(pb, size) == 1101) {
st->codecpar->extradata = av_strdup("BottomUp");
if (!st->codecpar->extradata)
return AVERROR(ENOMEM);
st->codecpar->extradata_size = 9;
if (!st->codecpar->extradata) {
st->codecpar->extradata = av_strdup("BottomUp");
if (!st->codecpar->extradata)
return AVERROR(ENOMEM);
st->codecpar->extradata_size = 9;
}
}
} else if (!strcmp(name, "Q_SPATIAL") || !strcmp(name, "Q_TEMPORAL")) {
var_read_metadata(avctx, name, size);