7c2bbf4aa66ca5a9fc2ca147e0e6cb6f407a3aa2
In the case of a metadata preallocation with a large cluster size, qcow2_alloc_cluster_offset() can allocate nothing and returns a NULL l2meta. This patch checks for it and link2 l2 with only valid l2meta. Replace 9 and 512 with BDRV_SECTOR_BITS, BDRV_SECTOR_SIZE respectively while at the function. Signed-off-by: Hu Tao <hutao@cn.fujitsu.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org - QEMU team
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