mount_vboxfs: /mnt: error -1: Cannot allocate memory

[stblassitude]

I've followed the instructions in the README.

I'm on VirtualBox 5.1.14 on Mac, using FreeBSD 11.0-STABLE #0 r314182 amd64, and the current virtualbox-ose-additions port (5.1.14).

Building seems to have worked without issues.

When trying to mount, I get this:

[root@ /var/ports/work/root/virtualbox-ose-additions/work/VirtualBox-5.1.14]# mount_vboxfs -w Downloads /mnt
mount_vboxfs: /mnt: error -1: Cannot allocate memory

In dmesg, I get:

vboxguest0 port 0xd020-0xd03f mem 0xf0400000-0xf07fffff,0xf0800000-0xf0803fff irq 20 at device 4.0 on pci0
vboxguest: loaded successfully
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
kldload: unexpected relocation type 10
VBOXVFS[1]: sfprov_mount: Enter
VBOXVFS[1]: sfprov_mount: path: [Downloads]
sfprov_mount(Downloads): error=12 rc=-8

I'm not currently set up for kernel debugging, and it's been a while since I've gotten my hands dirty in the kernel, but if there is a way I can help, I'd be happy to.