[FFmpeg-cvslog] avcodec/tiff: Avoid loosing allocated geotag values
Michael Niedermayer
git at videolan.org
Sun Jun 18 17:33:43 EEST 2017
ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Mon Jun 5 20:39:21 2017 +0200| [42b26b41a4e626fc9dbcb5e897a21729b2c85c87] | committer: Michael Niedermayer
avcodec/tiff: Avoid loosing allocated geotag values
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 at niedermayer.cc>
(cherry picked from commit d7cbeab4c1381f95ed0ebf85d7950bee96f66164)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=42b26b41a4e626fc9dbcb5e897a21729b2c85c87
---
libavcodec/tiff.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index dac406862d..c46f771565 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -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");
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