qcow2: Fix alloc_cluster_abort() for pre-existing clusters
authorMax Reitz <mreitz@redhat.com>
Tue, 25 Feb 2020 14:31:28 +0000 (15:31 +0100)
committerKevin Wolf <kwolf@redhat.com>
Fri, 6 Mar 2020 16:15:37 +0000 (17:15 +0100)
commit3ede935fdbbd5f7b24b4724bbfb8938acb5956d8
tree531fa0a3f95fdc9453fb3f8bebfedf1fde0b9f41
parentf4c4357fbfca0fb14e477bf661ae7384b4b9b283
qcow2: Fix alloc_cluster_abort() for pre-existing clusters

handle_alloc() reuses preallocated zero clusters.  If anything goes
wrong during the data write, we do not change their L2 entry, so we
must not let qcow2_alloc_cluster_abort() free them.

Fixes: 8b24cd141549b5b264baeddd4e72902cfb5de23b
Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200225143130.111267-2-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block/qcow2-cluster.c