[FFmpeg-cvslog] avformat/flac_picture: clear padding area

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Jan 31 17:31:21 2014 +0100| [13aa82bbbb71c04bdcecf1341be4a23aee271bec] | committer: Michael Niedermayer

avformat/flac_picture: clear padding area

aviod use of uninitialized memory

Fixes: asan_heap-oob_1487fa4_4706_cov_364534849_cover_art.flac
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=13aa82bbbb71c04bdcecf1341be4a23aee271bec
---

 libavformat/flac_picture.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/flac_picture.c b/libavformat/flac_picture.c
index a58b305..5f2026d 100644
--- a/libavformat/flac_picture.c
+++ b/libavformat/flac_picture.c
@@ -110,6 +110,7 @@ int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
     if (!(data = av_buffer_alloc(len + FF_INPUT_BUFFER_PADDING_SIZE))) {
         RETURN_ERROR(AVERROR(ENOMEM));
     }
+    memset(data->data + len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
     if (avio_read(pb, data->data, len) != len) {
         av_log(s, AV_LOG_ERROR, "Error reading attached picture data.\n");
         if (s->error_recognition & AV_EF_EXPLODE)