avformat/matroskadec: free the packet on webvtt side data allocation failure

Fixes potential memory leaks

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index edc4f5d476..bf0e47ce3a 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -3121,6 +3121,7 @@ static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
                                       AV_PKT_DATA_WEBVTT_IDENTIFIER,
                                       id_len);
         if (!buf) {
+            av_packet_unref(pkt);
             av_free(pkt);
             return AVERROR(ENOMEM);
         }
@@ -3132,6 +3133,7 @@ static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
                                       AV_PKT_DATA_WEBVTT_SETTINGS,
                                       settings_len);
         if (!buf) {
+            av_packet_unref(pkt);
             av_free(pkt);
             return AVERROR(ENOMEM);
         }