[FFmpeg-devel] [PATCH 4/6] Prevent calling init_vlc() with invalid parameters in motionpixels decoder.

[fenrir at elivagar.org]

From: Laurent Aimar <fenrir at videolan.org>

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

diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c
index 1605080..165a3d1 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);
-- 
1.7.2.5