From KoanSoftware Wiki
Q. A typical bitbake error
$ bitbake console-image ERROR: Openembedded's config sanity checker detected a potential misconfiguration. Either fix the cause of this error or at your own risk disable the checker (see sanity.conf). Following is the list of potential problems / advisories: /proc/sys/vm/mmap_min_addr is not 0. This will cause problems with qemu so please fix the value (as root). To fix this in later reboots, set vm.mmap_min_addr = 0 in /etc/sysctl.conf.
A. could be solved with
# echo 0 > /proc/sys/vm/mmap_min_addr