[FFmpeg-devel] [PATCH] Null check of &s->internal before attempting to free dict and pkt - avoid Null pointer dereference crash

[Robert Beyer]

---
 libavformat/utils.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/libavformat/utils.c b/libavformat/utils.c
index fe8eaa6cb3..73a7d13123 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -4331,9 +4331,11 @@ void avformat_free_context(AVFormatContext *s)
     }
     av_freep(&s->chapters);
     av_dict_free(&s->metadata);
-    av_dict_free(&s->internal->id3v2_meta);
-    av_packet_free(&s->internal->pkt);
-    av_packet_free(&s->internal->parse_pkt);
+    if (&s->internal) {
+        av_dict_free(&s->internal->id3v2_meta);
+        av_packet_free(&s->internal->pkt);
+        av_packet_free(&s->internal->parse_pkt);
+    }
     av_freep(&s->streams);
     flush_packet_queue(s);
     av_freep(&s->internal);
-- 
2.19.1.windows.1