motionpixels: Prevent calling init_vlc() with invalid parameters

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

motionpixels: Prevent calling init_vlc() with invalid parameters
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
1cd0a551 · Laurent Aimar · Janne Grunau · 5f05cf4e · 1cd0a551
Commit 1cd0a551 authored Sep 29, 2011 by Laurent Aimar Committed by Janne Grunau Oct 07, 2011
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motionpixels.c libavcodec/motionpixels.c +2 -0

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--- a/libavcodec/motionpixels.c
+++ b/libavcodec/motionpixels.c
@@ -281,6 +281,8 @@ 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);