diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2018-03-20 17:07:58 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2018-03-26 12:17:43 +0200 |
| commit | 2332d82589ef9e9f7e065ec1f759a2c164ad4932 (patch) | |
| tree | d2fb14f4a462cccac8fea81a86d4949a193982b0 | |
| parent | 50880f25c88f2a629bd68a5fb1a46aa9bf0a2543 (diff) | |
parallels: Check maximum cluster size on create
It's unclear what the real maximum cluster size is for the Parallels
format, but let's at least make sure that we don't get integer
overflows in our .bdrv_co_create implementation.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
| -rw-r--r-- | block/parallels.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/parallels.c b/block/parallels.c index e2515dec81..799215e079 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -526,6 +526,11 @@ static int coroutine_fn parallels_co_create(BlockdevCreateOptions* opts, cl_size = DEFAULT_CLUSTER_SIZE; } + /* XXX What is the real limit here? This is an insanely large maximum. */ + if (cl_size >= INT64_MAX / MAX_PARALLELS_IMAGE_FACTOR) { + error_setg(errp, "Cluster size is too large"); + return -EINVAL; + } if (total_size >= MAX_PARALLELS_IMAGE_FACTOR * cl_size) { error_setg(errp, "Image size is too large for this cluster size"); return -E2BIG; |