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gsingh93gsingh93
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Add script to create ubuntu debootstrap rootfs
1 parent 9b78ea0 commit 15164a1

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‎.github/workflows/build.yml‎

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@@ -115,6 +115,7 @@ jobs:
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matrix:
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kernel: [{ack: 0, version: 5.10.y}, {ack: 0, version: 5.15.y}, {ack: 0, version: 6.1.y}, {ack: 1, version: android13-5.10-lts}]
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arch: [arm64, x86_64]
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timeout-minutes: 20
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runs-on: ubuntu-22.04
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env:
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ACK: ${{ matrix.kernel.ack }}
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- name: Download all workflow run artifacts
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uses: actions/download-artifact@v3
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- name: Install common dependencies
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shell: bash
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run: sudo apt update && sudo apt install -y debootstrap
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- name: Install x86_64 dependencies
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if: ${{ matrix.arch == 'x86_64' }}
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shell: bash
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run: sudo apt update && sudo apt install -y qemu-system-x86
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run: sudo apt install -y qemu-system-x86
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- name: Install arm64 dependencies
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if: ${{ matrix.arch == 'arm64' }}
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shell: bash
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run: sudo apt update && sudo apt install -y qemu-system-arm
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run: sudo apt install -y qemu-system-arm qemu-user-static binfmt-support
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- name: Get real kernel version
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run: |
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- name: Initialize rootfs and initramfs
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run: |
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set -x
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make rootfs-init
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ROOTFS=./alpine-${{ matrix.arch }} make rootfs-init
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ROOTFS=./alpine-${{ matrix.arch }}.img make rootfs-init
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make cpio
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ROOTFS_DIR=./rootfs/alpine-${{ matrix.arch }} make cpio
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scripts/ubuntu_debootstrap.sh jammy ${{ matrix.arch }}
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SUDO=1 ROOTFS_DIR=./rootfs/ubuntu-jammy-${{ matrix.arch }} CPIO_FILE=ubuntu-jammy-${{ matrix.arch }}.cpio.gz make rootfs-overlay
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- name: Setup shared/init.sh
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run: |
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mkdir shared
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echo poweroff > shared/init.sh
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chmod +x shared/init.sh
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- run: ls -lR
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- name: Run kernel
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run: |
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME make run
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME ROOTFS=./rootfs-${{ matrix.arch }} make run
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME ROOTFS=./rootfs/ubuntu-jammy-${{ matrix.arch }}.img make run
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME INITRD=1 make run
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME CPU=2 MEM=2048M QEMU_EXTRA_ARGS="" QEMU_EXTRA_KERNEL_CMDLINE="nokaslr" make run
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME INITRD=./ubuntu-jammy-${{ matrix.arch }}.cpio.gz make run
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QEMU_KERNEL_IMAGE=./kernel-image/$IMAGE_NAME CPU=2 MEM=2048M QEMU_EXTRA_ARGS="" QEMU_EXTRA_KERNEL_CMDLINE="nokaslr" ROOTFS=./alpine-${{ matrix.arch }}.img make run
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- name: Upload rootfs artifact
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uses: actions/upload-artifact@v3

‎.gitignore‎

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/rootfs/*.img
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/rootfs/*.cpio.gz
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/rootfs/alpine-*/
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/rootfs/ubuntu-*/
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/toolchain
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/shared

‎README.md‎

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@@ -7,7 +7,7 @@ The only supported host OS is Ubuntu 22.04, things may or may not work on any ot
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First install the dependencies and clone the project:
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```bash
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sudo apt update
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sudo apt install -y bc bison build-essential flex git libelf-dev libssl-dev ncurses-dev qemu qemu-system-x86 qemu-system-arm llvm clang clang-tools lld lz4 binutils-aarch64-linux-gnu gcc-aarch64-linux-gnu pahole
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sudo apt install -y bc bison build-essential flex git libelf-dev libssl-dev ncurses-dev gdb gdb-multiarch qemu qemu-system-x86 qemu-system-arm qemu-user-static binfmt-support llvm clang clang-tools lld lz4 binutils-aarch64-linux-gnu gcc-aarch64-linux-gnu pahole dwarves
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git clone --recursive https://github.com/gsingh93/linux-exploit-dev-env
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cd linux-exploit-dev-env
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```

‎config/rootfs-overlay/etc/systemd/system/multi-user.target.wants/setup.service‎

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/etc/systemd/system/setup.service

‎config/rootfs-overlay/etc/systemd/system/[email protected]/override.conf‎

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[Service]
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Type=simple
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ExecStart=
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ExecStart=-/sbin/agetty --autologin root --noclear %I 38400 linux

‎config/rootfs-overlay/etc/systemd/system/setup.service‎

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[Unit]
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Documentation=man:systemd-sysv-generator(8)
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SourcePath=/etc/init.d/setup
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Description=Linux Exploit Dev Environment Setup
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[Service]
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Type=forking
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Restart=no
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TimeoutSec=5min
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IgnoreSIGPIPE=no
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KillMode=process
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GuessMainPID=no
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RemainAfterExit=yes
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SuccessExitStatus=5 6
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ExecStart=/etc/init.d/setup start
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ExecStop=/etc/init.d/setup stop
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[Install]
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WantedBy=multi-user.target

‎scripts/ubuntu_debootstrap.sh‎

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#!/bin/bash
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set -o errexit
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CWD=$(dirname -- "$0")
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ROOT_DIR="$(realpath ${CWD}/..)"
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NAME="${1:-jammy}"
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ARCH="${2:-x86_64}"
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DIR="${ROOT_DIR}/rootfs/ubuntu-${NAME}-${ARCH}"
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if [[ "$ARCH" == x86_64 ]]; then
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ARCH=amd64
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elif [[ "$ARCH" != arm64 ]]; then
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echo "usage: $0 [NAME] [x86_64 | arm64]"
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exit 1
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fi
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mkdir -p $DIR
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sudo debootstrap --arch $ARCH $NAME $DIR
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echo "Ubuntu ${NAME} debootstrap installed in ${DIR}"

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