[FFmpeg-cvslog] Prevent calling init_vlc() with invalid parameters in motionpixels decoder.

[Laurent Aimar]

ffmpeg | branch: release/0.8 | Laurent Aimar <fenrir at videolan.org> | Thu Sep 29 01:04:52 2011 +0200| [f8eabfc16ed260ae33bd2c15c240eaf2129dba47] | committer: Michael Niedermayer

Prevent calling init_vlc() with invalid parameters in motionpixels decoder.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 41b7389cade702383e59343561776f83bb26e17f)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f8eabfc16ed260ae33bd2c15c240eaf2129dba47
---

 libavcodec/motionpixels.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c
index b18efa6..4bd83cb 100644
--- a/libavcodec/motionpixels.c
+++ b/libavcodec/motionpixels.c
@@ -279,6 +279,8 @@ static int mp_decode_frame(AVCodecContext *avctx,
     if (sz == 0)
         goto end;
 
+    if (mp->max_codes_bits <= 0)
+        goto end;
     if (init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0))
         goto end;
     mp_decode_frame_helper(mp, &gb);