vmdaudio: validate block type

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

vmdaudio: validate block type
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
22f893e1 · Justin Ruggles · Ronald S. Bultje · dd1af513 · 22f893e1
Commit 22f893e1 authored Feb 23, 2011 by Justin Ruggles Committed by Ronald S. Bultje Feb 24, 2011
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vmdav.c libavcodec/vmdav.c +4 -0

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--- a/libavcodec/vmdav.c
+++ b/libavcodec/vmdav.c
@@ -518,6 +518,10 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
        return buf_size;

    block_type = buf[6];
+    if (block_type < BLOCK_TYPE_AUDIO || block_type > BLOCK_TYPE_SILENCE) {
+        av_log(avctx, AV_LOG_ERROR, "unknown block type: %d\n", block_type);
+        return AVERROR(EINVAL);
+    }

    if (block_type == BLOCK_TYPE_AUDIO) {
        /* the chunk contains audio */