tools: add script that creates a Linux image suitable for syzkaller

1 files changed, 36 insertions, 0 deletions

diff --git a/tools/create-image.sh b/tools/create-image.sh
new file mode 100755
index 000000000..3f62c961b
--- /dev/null
+++ b/tools/create-image.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Copyright 2016 syzkaller project authors. All rights reserved.
+# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+# create-image.sh creates a minimal Debian-wheezy Linux image suitable for syzkaller.
+
+set -eux
+
+# Create a minimal Debian-wheezy distributive as a directory.
+sudo rm -rf wheezy
+mkdir -p wheezy
+sudo debootstrap --include=openssh-server wheezy wheezy
+
+# Set some defaults and enable promtless ssh to the machine for root.
+sudo sed -i '/^root/ { s/:x:/::/ }' wheezy/etc/passwd
+echo 'V0:23:respawn:/sbin/getty 115200 hvc0' | sudo tee -a wheezy/etc/inittab
+printf '\nauto eth0\niface eth0 inet dhcp\n' | sudo tee -a wheezy/etc/network/interfaces
+echo 'debugfs /sys/kernel/debug debugfs defaults 0 0' | sudo tee -a wheezy/etc/fstab
+echo 'debug.exception-trace = 0' | sudo tee -a wheezy/etc/sysctl.conf
+sudo mkdir wheezy/root/.ssh/
+rm -rf ssh
+mkdir -p ssh
+ssh-keygen -f ssh/id_rsa -t rsa -N ''
+cat ssh/id_rsa.pub | sudo tee wheezy/root/.ssh/authorized_keys
+
+# Install some misc packages.
+sudo chroot wheezy /bin/bash -c "apt-get update; ( yes | apt-get install curl tar time strace)"
+
+# Build a disk image
+dd if=/dev/zero of=wheezy.img bs=1M seek=1023 count=1
+mkfs.ext4 -F wheezy.img
+sudo mkdir -p /mnt/wheezy
+sudo mount -o loop wheezy.img /mnt/wheezy
+sudo cp -a wheezy/. /mnt/wheezy/.
+sudo umount /mnt/wheezy
+