[FFmpeg-cvslog] segafilm: Error out on impossible packet size

[Luca Barbato]

ffmpeg | branch: release/0.10 | Luca Barbato <lu_zero at gentoo.org> | Tue Aug 13 07:40:38 2013 +0200| [896baaaad85c402db187c1c81ececc3a9624dbc1] | committer: Sean McGovern

segafilm: Error out on impossible packet size

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable at libav.org
(cherry picked from commit 5268bd2900effa59b51e0fede61aacde5e2f0b95)
Signed-off-by: Luca Barbato <lu_zero at gentoo.org>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=896baaaad85c402db187c1c81ececc3a9624dbc1
---

 libavformat/segafilm.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c
index 5c346a7..5279121 100644
--- a/libavformat/segafilm.c
+++ b/libavformat/segafilm.c
@@ -210,6 +210,8 @@ static int film_read_header(AVFormatContext *s,
         film->sample_table[i].sample_offset =
             data_offset + AV_RB32(&scratch[0]);
         film->sample_table[i].sample_size = AV_RB32(&scratch[4]);
+        if (film->sample_table[i].sample_size > INT_MAX / 4)
+            return AVERROR_INVALIDDATA;
         if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
             film->sample_table[i].stream = film->audio_stream_index;
             film->sample_table[i].pts = audio_frame_counter;