segment: Check open_null_ctx() return value

Reported-By: infer

diff --git a/libavformat/segment.c b/libavformat/segment.c
index 55ba6569f2a4199cc383b92820b675e64cbbbd03..3479134ec84d82e3220ef2adb64fe33aab8f70ab 100644 (file)
--- a/libavformat/segment.c
+++ b/libavformat/segment.c
@@ -351,7 +351,8 @@ static int seg_write_trailer(struct AVFormatContext *s)
     if (!seg->write_header_trailer) {
         if ((ret = segment_end(oc, 0)) < 0)
             goto fail;
-        open_null_ctx(&oc->pb);
+        if ((ret = open_null_ctx(&oc->pb)) < 0)
+            goto fail;
         ret = av_write_trailer(oc);
         close_null_ctx(oc->pb);
     } else {