diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2014-03-26 13:05:50 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-04-01 15:22:34 +0200 |
| commit | 2b5d5953eec0cc541857c3df812bdf8421596ab2 (patch) | |
| tree | 46005cfd30454c30b3e4853a8146e1ac260bee3c /block/qcow2.c | |
| parent | db8a31d11d6a60f48d6817530640d75aa72a9a2f (diff) | |
qcow2: Check new refcount table size on growth
If the size becomes larger than what qcow2_open() would accept, fail the
growing operation.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index d4d991cbb3..b64564d171 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -609,9 +609,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags, s->refcount_table_size = header.refcount_table_clusters << (s->cluster_bits - 3); - if (header.refcount_table_clusters > (0x800000 >> s->cluster_bits)) { - /* 8 MB refcount table is enough for 2 PB images at 64k cluster size - * (128 GB for 512 byte clusters, 2 EB for 2 MB clusters) */ + if (header.refcount_table_clusters > qcow2_max_refcount_clusters(s)) { error_setg(errp, "Reference count table too large"); ret = -EINVAL; goto fail; |