It's theoretically possible to add multiple devices with sizes that add up
to or exceed 16EiB. A file system will be created successfully but will
have a superblock with incorrect values for total_bytes and other fields.
Kernels up to v5.0 will crash when they encounter this scenario.
We need to check for overflow and reject the device if it would overflow.
Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1099147
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
d29f475108