diff options
| author | Daniel P. Berrange <berrange@redhat.com> | 2017-06-23 17:24:03 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:44:55 +0200 |
| commit | 6aa837f7bd60903573e0644f503f455454bbf5ae (patch) | |
| tree | 908f64129f2b399fa84c548f1a18e6a898cc7971 /block/qcow.c | |
| parent | 0b4ee9090e278a46b00b21624ba610552d0106d8 (diff) | |
qcow: require image size to be > 1 for new images
The qcow driver refuses to open images which are less than
2 bytes in size, but will happily create such images. Add
a check in the create path to avoid this discrepancy.
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170623162419.26068-5-berrange@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/qcow.c')
| -rw-r--r-- | block/qcow.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/qcow.c b/block/qcow.c index 7bd94dcd46..49871fb873 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -811,6 +811,12 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp) /* Read out options */ total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), BDRV_SECTOR_SIZE); + if (total_size == 0) { + error_setg(errp, "Image size is too small, cannot be zero length"); + ret = -EINVAL; + goto cleanup; + } + backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) { flags |= BLOCK_FLAG_ENCRYPT; |