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avcodec/dsicinvideo: Fail if there is only a small fraction of the data available that comprises a full frame 

Fixes: Timeout
Fixes: 6306/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DSICINVIDEO_fuzzer-5079253549842432

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 2018-04-16 22:29:09 +02:00
parent 942217b153
commit 5549488bbf
1 changed files with 7 additions and 0 deletions
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7
libavcodec/dsicinvideo.c
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@ -158,6 +158,9 @@ static int cin_decode_lzss(const unsigned char *src, int src_size,
}
}
if (dst_end - dst > dst_size - dst_size/10)
return AVERROR_INVALIDDATA;
return 0;
}
@ -184,6 +187,10 @@ static int cin_decode_rle(const unsigned char *src, int src_size,
}
dst += len;
}
if (dst_end - dst > dst_size - dst_size/10)
return AVERROR_INVALIDDATA;
return 0;
}