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avcodec/tiff: Avoid loosing allocated geotag values

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Fixes memleak
Fixes: 2076/clusterfuzz-testcase-minimized-6542640243802112

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d7cbeab4c1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2017-06-05 20:39:21 +02:00
parent bcf63142d1
commit 42b26b41a4
1 changed files with 2 additions and 0 deletions
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2
libavcodec/tiff.c
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@@ -1122,6 +1122,8 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
return AVERROR_INVALIDDATA;
if (s->geotags[i].val)
return AVERROR_INVALIDDATA;
ap = av_malloc(s->geotags[i].count);
if (!ap) {
av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");