diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 92cb9f9bfa..defc1fe49f 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1280,6 +1280,12 @@ static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags, goto fail; } + if (header.refcount_table_clusters == 0 && !(flags & BDRV_O_CHECK)) { + error_setg(errp, "Image does not contain a reference count table"); + ret = -EINVAL; + goto fail; + } + ret = validate_table_offset(bs, s->refcount_table_offset, s->refcount_table_size, sizeof(uint64_t)); if (ret < 0) { |