[FFmpeg-cvslog] avcodec/utils: fix leak of subtitle_header on error path

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Thu Jul  4 23:39:23 2019 +0200| [9cb0da0bfef9d751b5f72779d7f20dab6dd98b86] | committer: Michael Niedermayer

avcodec/utils: fix leak of subtitle_header on error path

Fixes: memleak
Fixes: 15528/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_STL_fuzzer-5735993371525120
Fixes: 15792/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SAMI_fuzzer-5737754232619008
Fixes: 16008/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SSA_fuzzer-5650582821404672

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 923d5c489fd4ffd0b9dbfdc6c14f594bd134ab47)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9cb0da0bfef9d751b5f72779d7f20dab6dd98b86
---

 libavcodec/utils.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 66c68d1cf5..a6a646636d 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1041,6 +1041,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
 
     av_dict_free(&tmp);
     av_freep(&avctx->priv_data);
+    av_freep(&avctx->subtitle_header);
     if (avctx->internal) {
         av_frame_free(&avctx->internal->to_free);
         av_frame_free(&avctx->internal->compat_decode_frame);