[FFmpeg-cvslog] nutdec: Prevent a memory corruption

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Sat Oct 18 16:58:47 2014 +0100| [96bfb677478514db73d1b63b4213c97ad4269e8f] | committer: Vittorio Giovara

nutdec: Prevent a memory corruption

Chapters do not have an event_flags field.

Bug-Id: CID 1231990

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=96bfb677478514db73d1b63b4213c97ad4269e8f
---

 libavformat/nutdec.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 6c95d55..56d208f 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -461,7 +461,7 @@ static int decode_info_header(NUTContext *nut)
     int64_t value, end;
     char name[256], str_value[1024], type_str[256];
     const char *type;
-    int *event_flags;
+    int *event_flags        = NULL;
     AVChapter *chapter      = NULL;
     AVStream *st            = NULL;
     AVDictionary **metadata = NULL;
@@ -529,7 +529,8 @@ static int decode_info_header(NUTContext *nut)
             }
             if (metadata && av_strcasecmp(name, "Uses") &&
                 av_strcasecmp(name, "Depends") && av_strcasecmp(name, "Replaces")) {
-                *event_flags |= metadata_flag;
+                if (event_flags)
+                    *event_flags |= metadata_flag;
                 av_dict_set(metadata, name, str_value, 0);
             }
         }