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avformat/aaxdec: Check for overlaping segments 

Fixes: Timeout
Fixes: 45875/clusterfuzz-testcase-minimized-ffmpeg_dem_AAX_fuzzer-6121689903136768

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 2022-03-23 00:57:34 +01:00
parent b0cac7082d
commit c16a0ed242
1 changed files with 4 additions and 0 deletions
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4
libavformat/aaxdec.c
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@ -252,6 +252,10 @@ static int aax_read_header(AVFormatContext *s)
size = avio_rb32(pb);
a->segments[r].start = start + a->data_offset;
a->segments[r].end = a->segments[r].start + size;
if (r &&
a->segments[r].start < a->segments[r-1].end &&
a->segments[r].end > a->segments[r-1].start)
return AVERROR_INVALIDDATA;
} else
return AVERROR_INVALIDDATA;
}