diff options
| -rw-r--r-- | block/vmdk.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index 84f8bbe..a9d0084 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -333,6 +333,12 @@ static int vmdk_is_cid_valid(BlockDriverState *bs) if (!s->cid_checked && bs->backing) { BlockDriverState *p_bs = bs->backing->bs; + if (strcmp(p_bs->drv->format_name, "vmdk")) { + /* Backing file is not in vmdk format, so it does not have + * a CID, which makes the overlay's parent CID invalid */ + return 0; + } + if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { /* read failure: report as not valid */ return 0; |