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avformat/demux: Count EAGAIN as 100 bytes in relation to read limit in avformat_find_stream_info()

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Fixes: Timeout
Fixes: 43717/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5206008287330304
Fixes: 45738/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6142535657979904

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 2022-02-08 20:04:25 +01:00
parent 02699490c1
commit b0cac7082d
1 changed files with 3 additions and 1 deletions
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4
libavformat/demux.c
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@ -2615,8 +2615,10 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
/* NOTE: A new stream can be added there if no header in file
* (AVFMTCTX_NOHEADER). */
ret = read_frame_internal(ic, pkt1);
if (ret == AVERROR(EAGAIN))
if (ret == AVERROR(EAGAIN)) {
read_size += 100;
continue;
}
if (ret < 0) {
/* EOF or error*/