[FFmpeg-cvslog] segment: fix null pointer dereference

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Thu Mar 22 03:36:25 2012 +0000| [4246032216181c778f7ddf7f2e062cada2ef346d] | committer: Michael Niedermayer

segment: fix null pointer dereference

Signed-off-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4246032216181c778f7ddf7f2e062cada2ef346d
---

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

diff --git a/libavformat/segment.c b/libavformat/segment.c
index 1af412a..05f76a7 100644
--- a/libavformat/segment.c
+++ b/libavformat/segment.c
@@ -174,11 +174,13 @@ static int seg_write_header(AVFormatContext *s)
 
 fail:
     if (ret) {
-        oc->streams = NULL;
-        oc->nb_streams = 0;
+        if (oc) {
+            oc->streams = NULL;
+            oc->nb_streams = 0;
+            avformat_free_context(oc);
+        }
         if (seg->list)
             avio_close(seg->pb);
-        avformat_free_context(oc);
     }
     return ret;
 }