tree 8718cb3217caee3ec65fae3fc6ee98300aede534
parent 4dc20e6465eccd2466a449d3fb49539f5d9f53dd
author Kevin Wolf <kwolf@redhat.com> 1588253403 +0200
committer Kevin Wolf <kwolf@redhat.com> 1588937195 +0200

vmdk: Fix zero cluster allocation

m_data must contain valid data even for zero clusters when no cluster
was allocated in the image file. Without this, zero writes segfault with
images that have zeroed_grain=on.

For zero writes, we don't want to allocate a cluster in the image file
even in compressed files.

Fixes: 524089bce43fd1cd3daaca979872451efa2cf7c6
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-3-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>