avformat/mpsubdec: Clear queue on error

Fixes: Memleaks
Fixes: 17219/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5720539124989952
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/libavformat/mpsubdec.c b/libavformat/mpsubdec.c
index 3d8dcb35c2b853d713a041392fcdca5f489c0f61..82c73457ead69b2813ad2bb836a3b7a58ad44814 100644 (file)
--- a/libavformat/mpsubdec.c
+++ b/libavformat/mpsubdec.c
@@ -163,6 +163,9 @@ static int mpsub_read_header(AVFormatContext *s)
     ff_subtitles_queue_finalize(s, &mpsub->q);
 
 end:
+    if (res < 0)
+        ff_subtitles_queue_clean(&mpsub->q);
+
     av_bprint_finalize(&buf, NULL);
     return res;
 }