Rebuilding kernel module failed on VirtualBox 5.2

[tfmeier]

I'm trying to install VirtualBox 5.2 on Fedora 30.

I ran the following commands

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dnf update
dnf install @development-tools
dnf install kernel-devel kernel-headers dkms qt5-qtx11extras  elfutils-libelf-devel zlib-devel
dnf install VirtualBox-5.2

Rebuild kernel modules with following command

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## Fedora 32/31/30/29 and CentOS/RHEL 8/7 ##
/usr/lib/virtualbox/vboxdrv.sh setup

At this point I get the following error (note that VirtualBox has not been started yet)
failed: modprobe vboxdrv failed. Please use 'dmesg' to find out why.

Output of 'dmesg' as follows

Any idea why this failed?

[fth0]

I can't give you an overly specific answer (you have to Google that yourself). But the error message says that "unsigned module loading is restricted" and also tells you where to start investigating "man kernel_lockdown.7". So that tells me that you should research the signing of kernel modules for your host OS.

[tfmeier]

I can't give you an overly specific answer (you have to Google that yourself). But the error message says that "unsigned module loading is restricted" and also tells you where to start investigating "man kernel_lockdown.7". So that tells me that you should research the signing of kernel modules for your host OS.

Thanks incidentally I just found a workaround for this. The BIOS was set to Secure Boot Enabled. Upon disabling Secure Boot I was able to rebuild the kernel. So all good now.

[fth0]

Yes, that's a valid workaround. With Secure Boot disabled, you don't have to sign kernel modules. Thanks for reporting back!