[FFmpeg-devel] [PATCH 2/7] avformat/id3v2: Fix double-free on error

[Andreas Rheinhardt]

ff_id3v2_parse_priv_dict() uses av_dict_set() with the flags
AV_DICT_DONT_STRDUP_KEY and AV_DICT_DONT_STRDUP_VAL. In this case both
key and value are freed on error (and owned by the destination
dictionary on success), so that freeing them again on error is a
double-free and therefore forbidden. But it nevertheless happened.

Fixes CID 1452489 and 1452421.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
---
 libavformat/id3v2.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index b43ab1745f..e9843eef9a 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -1263,8 +1263,6 @@ int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta **extra_met
             }
 
             if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
-                av_free(key);
-                av_free(escaped);
                 return ret;
             }
         }
-- 
2.20.1