[FFmpeg-cvslog] avformat/vorbiscomment: Check entry length in ff_vorbiscomment_write()
Michael Niedermayer
git at videolan.org
Tue Jun 2 00:50:04 CEST 2015
ffmpeg | branch: release/2.4 | Michael Niedermayer <michaelni at gmx.at> | Mon May 11 15:23:51 2015 +0200| [27a0dab9140f569efc06c05cbe5a7b6bb9d8ef6a] | committer: Michael Niedermayer
avformat/vorbiscomment: Check entry length in ff_vorbiscomment_write()
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit eca38864a6ce5053e463b8d3fc22b22bc9a49578)
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=27a0dab9140f569efc06c05cbe5a7b6bb9d8ef6a
---
libavformat/vorbiscomment.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavformat/vorbiscomment.c b/libavformat/vorbiscomment.c
index cc9b662..e953d83 100644
--- a/libavformat/vorbiscomment.c
+++ b/libavformat/vorbiscomment.c
@@ -61,8 +61,10 @@ int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m,
AVDictionaryEntry *tag = NULL;
bytestream_put_le32(p, count);
while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
- unsigned int len1 = strlen(tag->key);
- unsigned int len2 = strlen(tag->value);
+ int64_t len1 = strlen(tag->key);
+ int64_t len2 = strlen(tag->value);
+ if (len1+1+len2 > UINT32_MAX)
+ return AVERROR(EINVAL);
bytestream_put_le32(p, len1+1+len2);
bytestream_put_buffer(p, tag->key, len1);
bytestream_put_byte(p, '=');
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