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handle invalid buffer sizes
Originally committed as revision 2734 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -900,6 +900,11 @@ static int ipvideo_decode_frame(AVCodecContext *avctx,
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IpvideoContext *s = avctx->priv_data;
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AVPaletteControl *palette_control = avctx->palctrl;
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/* compressed buffer needs to be large enough to at least hold an entire
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* decoding map */
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if (buf_size < s->decoding_map_size)
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return buf_size;
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s->decoding_map = buf;
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s->buf = buf + s->decoding_map_size;
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s->size = buf_size - s->decoding_map_size;
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