Installation ​

Requirements ​

• Linux kernel 5.13.0
  • BTF (CONFIG_DEBUG_INFO_BTF) must be enabled.
  • BPF LSM (CONFIG_LSM with bpf) must be enabled. This parameter can also be changed in the boot parameter.

Kernel Configuration ​

The kernel must have been compiled with the following flags set:

CONFIG_BPF=y
CONFIG_BPF_SYSCALL=y
CONFIG_BPF_LSM=y
CONFIF_BPF_JIT=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_BPF_EVENTS=y
CONFIG_DEBUG_INTO_BTF=y

Kernel compile flags can usually be checked in /proc/config.gz or /boot/config-<kernel-version>.

Also, the CONFIG_LSM flag must contain bpf. This can also be controlled by the following boot parameter:

$ cat /etc/default/grub
...
GRUB_CMDLINE_LINUX="... lsm=lockdown,yama,apparmor,bpf"
...

Finally, run update-grub2.

sudo update-grub2

Installation ​

Download the latest binary.

make libbpf-static
make build

sudo ./build/safeguard --config config/safeguard.yml #|grep BLOCK