[FFmpeg-cvslog] avcodec/tiff: Fix leak of geotags[].val

[Michael Niedermayer]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jun 11 01:05:26 2017 +0200| [f3ac7e40d6bf1a7f7b750fa8a4d4545a1faa79af] | committer: Michael Niedermayer

avcodec/tiff: Fix leak of geotags[].val

Fixes: 2176/clusterfuzz-testcase-minimized-5908197216878592

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 22a25ab3896cbb8dceebdba4d439e8b2b398ff0e)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f3ac7e40d6bf1a7f7b750fa8a4d4545a1faa79af
---

 libavcodec/tiff.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 81bf7ae54d..6d833cd992 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -1111,6 +1111,8 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
                 if (s->geotags[i].count == 0
                     || s->geotags[i].offset + s->geotags[i].count > count) {
                     av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
+                } else if (s->geotags[i].val) {
+                    av_log(s->avctx, AV_LOG_WARNING, "Duplicate GeoTIFF key %d\n", s->geotags[i].key);
                 } else {
                     char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");
                     if (!ap) {