guest additions installation failing on CentOS 7.2

[mwasilewski]

looks like similar/related to #15579

After fresh installation of CentOS 7.2 and yum upgrade I tried to install guest additions and got:

vboxadd.sh: Building Guest Additions kernel modules.

Broadcast message from systemd-journald@xxxxx ():

dracut[xxx]: Can't write to /boot/initramfs-/usr/src: Directory /boot/initramfs-/usr/src does not exist or is not accessible.

the trailing slash is present in the for loop in VBoxLinuxAdditions.run

giving user and group write permissions to /boot didn't help. Giving full access to /boot (0777) didn't help. also looked at selinux (logs, reruning in permissive) but failed as well.

running dracut command from update_module_dependencies() on line 720 in cli as root worked fine

[mwasilewski]

works fine with 5.0.26

[Michael Thayer]

Please try a current test build<1>.

<1> https://www.virtualbox.org/wiki/Testbuilds

[mwasilewski]

installation of guest additions succeeded on 5.1.3-109780, haven't encountered any problems with it yet

on a separate note, I got a policykit error, but it seems to be related to gui not being up to date with latest CentOS libraries

so all in all, this is resolved in the testbuild

Thanks for your help