avformat/sbgdec: fix leak in sbg_read_header()

In sbg_read_header(), if avformat_new_stream() failed, it returns
without cleanup, which may cause memory leaks. Replace return statement
with goto so that we would first clean up then return.

Signed-off-by: Lidong Yan <[email protected]>
Reviewed-by: Nicolas George <[email protected]>
Signed-off-by: James Almer <[email protected]>

1 files changed, 4 insertions, 2 deletions

diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c
index bf319be228..4afb51b844 100644
--- a/libavformat/sbgdec.c
+++ b/libavformat/sbgdec.c
@@ -1434,8 +1434,10 @@ static av_cold int sbg_read_header(AVFormatContext *avf)
     }
 
     st = avformat_new_stream(avf, NULL);
-    if (!st)
-        return AVERROR(ENOMEM);
+    if (!st) {
+        r = AVERROR(ENOMEM);
+        goto fail;
+    }
     sti = ffstream(st);
     st->codecpar->codec_type     = AVMEDIA_TYPE_AUDIO;
     st->codecpar->codec_id       = AV_CODEC_ID_FFWAVESYNTH;