提交 9026ec8a 编写于 作者: A Anton Khirnov 提交者: Sean McGovern

matroskadec: make sure not to leave EbmlBin in an inconsistent state

If a read fails, the current code will free the data but leave the size
non-zero. Make sure the size is zeroed in such a case.

CC: libav-stable@libav.org
Bug-Id: 1001
Found-By: Kamil Frankowicz
Signed-off-by: NSean McGovern <gseanmcg@gmail.com>
上级 9b1db2d3
......@@ -750,16 +750,19 @@ static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
{
av_free(bin->data);
bin->size = 0;
if (!(bin->data = av_mallocz(length + AV_INPUT_BUFFER_PADDING_SIZE)))
return AVERROR(ENOMEM);
bin->size = length;
bin->pos = avio_tell(pb);
if (avio_read(pb, bin->data, length) != length) {
av_freep(&bin->data);
return AVERROR(EIO);
}
bin->size = length;
return 0;
}
......
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