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avcodec/tiff: Check for multiple geo key directories 

Fixes memleak
Fixes: 826/clusterfuzz-testcase-5316921379520512

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-03-13 20:45:08 +01:00
parent 0728d9a281
commit 108b02e547
1 changed files with 4 additions and 0 deletions
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4
libavcodec/tiff.c
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@ -1045,6 +1045,10 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
ADD_METADATA(count, "ModelTiepointTag", NULL);
break;
case TIFF_GEO_KEY_DIRECTORY:
if (s->geotag_count) {
avpriv_request_sample(s->avctx, "Multiple geo key directories\n");
return AVERROR_INVALIDDATA;
}
ADD_METADATA(1, "GeoTIFF_Version", NULL);
ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");
s->geotag_count = ff_tget_short(&s->gb, s->le);