This also affects me on Ubuntu 18.04, kernel 4.15.0-39.
This issue is causing update-initramfs to fail since many of the initramfs-tools hooks use cp -a and are unable to complete.
This also affects me on Ubuntu 18.04, kernel 4.15.0-39.
This issue is causing update-initramfs to fail since many of the initramfs-tools hooks use cp -a and are unable to complete.