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Prevent segfault due to reading over the end of the input buffer.

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Originally committed as revision 12315 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-03-04 21:39:21 +00:00
parent 7998988129
commit 1a2a1d9077
1 changed files with 4 additions and 1 deletions
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5
libavcodec/apedec.c
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@ -256,7 +256,10 @@ static inline void range_start_decoding(APEContext * ctx)
static inline void range_dec_normalize(APEContext * ctx)
{
while (ctx->rc.range <= BOTTOM_VALUE) {
ctx->rc.buffer = (ctx->rc.buffer << 8) | bytestream_get_byte(&ctx->ptr);
ctx->rc.buffer <<= 8;
if(ctx->ptr < ctx->data_end)
ctx->rc.buffer += *ctx->ptr;
ctx->ptr++;
ctx->rc.low = (ctx->rc.low << 8) | ((ctx->rc.buffer >> 1) & 0xFF);
ctx->rc.range <<= 8;
}