syzkaller/pkg/kernel/generated.go

// AUTOGENERATED FILE

package kernel

const createImageScript = `#!/bin/bash


set -eux

if [ ! -e $1/sbin/init ]; then
	echo "usage: create-gce-image.sh /dir/with/user/space/system /path/to/bzImage"
	exit 1
fi

if [ "$(basename $2)" != "bzImage" ]; then
	echo "usage: create-gce-image.sh /dir/with/user/space/system /path/to/bzImage"
	exit 1
fi

sudo umount disk.mnt || true
sudo qemu-nbd -d /dev/nbd0 || true
rm -rf disk.mnt disk.raw tag obj || true

sudo modprobe nbd
fallocate -l 2G disk.raw
sudo qemu-nbd -c /dev/nbd0 --format=raw disk.raw
mkdir -p disk.mnt
echo -en "o\nn\np\n1\n2048\n\na\n1\nw\n" | sudo fdisk /dev/nbd0
until [ -e /dev/nbd0p1 ]; do sleep 1; done
sudo mkfs.ext4 /dev/nbd0p1
sudo mount /dev/nbd0p1 disk.mnt
sudo cp -a $1/. disk.mnt/.
sudo cp $2 disk.mnt/vmlinuz
sudo sed -i "/^root/ { s/:x:/::/ }" disk.mnt/etc/passwd
echo "T0:23:respawn:/sbin/getty -L ttyS0 115200 vt100" | sudo tee -a disk.mnt/etc/inittab
echo -en "auto lo\niface lo inet loopback\nauto eth0\niface eth0 inet dhcp\n" | sudo tee disk.mnt/etc/network/interfaces
echo "debugfs /sys/kernel/debug debugfs defaults 0 0" | sudo tee -a disk.mnt/etc/fstab

echo "kernel.printk = 7 4 1 3" | sudo tee -a disk.mnt/etc/sysctl.conf
echo "debug.exception-trace = 0" | sudo tee -a disk.mnt/etc/sysctl.conf
if [ -f $SYZ_SYSCTL_FILE ]; then
	cat $SYZ_SYSCTL_FILE | sudo tee -a disk.mnt/etc/sysctl.conf
fi

echo -en "127.0.0.1\tlocalhost\n" | sudo tee disk.mnt/etc/hosts
echo "nameserver 8.8.8.8" | sudo tee -a disk.mnt/etc/resolve.conf
echo "ClientAliveInterval 420" | sudo tee -a disk.mnt/etc/ssh/sshd_config
echo "syzkaller" | sudo tee disk.mnt/etc/hostname
rm -f key key.pub
ssh-keygen -f key -t rsa -N ""
sudo mkdir -p disk.mnt/root/.ssh
sudo cp key.pub disk.mnt/root/.ssh/authorized_keys
sudo chown root disk.mnt/root/.ssh/authorized_keys
sudo mkdir -p disk.mnt/boot/grub

CMDLINE=""
if [ -f $SYZ_CMDLINE_FILE ]; then
	CMDLINE=$(awk '{printf("%s ", $0)}' $SYZ_CMDLINE_FILE)
fi

cat << EOF | sudo tee disk.mnt/boot/grub/grub.cfg
terminal_input console
terminal_output console
set timeout=0
menuentry 'linux' --class gnu-linux --class gnu --class os {
	insmod vbe
	insmod vga
	insmod video_bochs
	insmod video_cirrus
	insmod gzio
	insmod part_msdos
	insmod ext2
	set root='(hd0,1)'
	linux /vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native rodata=n ftrace_dump_on_oops=orig_cpu oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 $CMDLINE
}
EOF
sudo grub-install --boot-directory=disk.mnt/boot --no-floppy /dev/nbd0
sudo umount disk.mnt
rm -rf disk.mnt
sudo qemu-nbd -d /dev/nbd0
`