cc60e327c0988a5e5288cf7bb78cd9848db800ab
qemu-img rebase must always give clusters in the COW file priority over those in the backing file. As it failed to use number of non-allocated clusters but assumed the maximum, it was possible that allocated clusters were taken from the backing file instead, leading to a corrupted output image. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Read the documentation in qemu-doc.html. Fabrice Bellard.
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