#cat /var/log/vboxadd-install.log
/tmp/vbox.0/Makefile.include.header:112: *** Error: unable to find the sources of your current Linux kernel. Specify KERN_DIR=<directory> and run Make again. Stop

#rpm -qa | grep kernel | sort
abrt-addon-kerneloops-2.1.11-48.e17.centos.x86_64
kernel-3.10.0-693.21.1.e17.x86_64
kernel-3.10.0-693.e17.x86_64
kernel-debug-devel-3.10.0-693.21.1.e17.x86_64
kernel-headers-3.10.0-693.21.1.e17.x86_64
kernel-tools-3.10.0-693.21.1.e17.x86_64
kernel-tools-libs-3.10.0-693.21.1.e17.x86_64