OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

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: 8b24cd1415
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>
This commit is contained in:
Max Reitz 2020-02-25 15:31:28 +01:00 committed by Kevin Wolf
parent f4c4357fbf
commit 3ede935fdb
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/qcow2-cluster.c
View File

@ -1026,7 +1026,7 @@ err:
void qcow2_alloc_cluster_abort(BlockDriverState *bs, QCowL2Meta *m)
{
BDRVQcow2State *s = bs->opaque;
if (!has_data_file(bs)) {
if (!has_data_file(bs) && !m->keep_old_clusters) {
qcow2_free_clusters(bs, m->alloc_offset,
m->nb_clusters << s->cluster_bits,
QCOW2_DISCARD_NEVER);