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| #!/bin/sh | ||
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| set -e | ||
| cd linux | ||
| make clean | ||
| make defconfig | ||
| make -j32 bzImage |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,97 @@ | ||
| #!/bin/sh | ||
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| # Based on Google's syzkaller project (https://github.com/google/syzkaller/, Apache 2.0 license) | ||
| # See https://github.com/google/syzkaller/blob/master/tools/create-image.sh | ||
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| set -eux | ||
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| if [ "$#" -ne 2 ] ; then | ||
| echo "Usage: $0 <debian release> <vm folder>" >&2 | ||
| exit 1 | ||
| fi | ||
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| SCRIPT="$(readlink -f "$0")" | ||
| RELEASE="$1" | ||
| ROOT="$(readlink -f "$2")" | ||
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| VM="$ROOT/vm" | ||
| KERNEL="$(dirname "$SCRIPT")/linux/" | ||
| IMAGENAME="vm.img" | ||
| IMAGE="$ROOT/$IMAGENAME" | ||
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| if [ -d "$VM" ] ; then | ||
| sudo rm -rfI "$VM" | ||
| elif [ -e "$VM" ] ; then | ||
| echo "$VM exists, but is not a directory" >&2 | ||
| exit 1 | ||
| fi | ||
| mkdir -p "$VM" | ||
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| # Install packages. For wheezy, requires the vsyscall=emulate kernel parameter | ||
| sudo debootstrap --include=openssh-server,curl,tar,gcc,libc6-dev,time,strace,sudo,less,psmisc "$RELEASE" "$VM" | ||
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| # Enable password-less login | ||
| sudo sed -i '/^root/ { s/:x:/::/ }' "$VM/etc/passwd" | ||
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| # Login automatically on boot | ||
| echo 'T0:23:respawn:/sbin/getty -a root -L ttyS0 115200 vt100' | sudo tee -a "$VM/etc/inittab" | ||
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| # Set up networking | ||
| printf '\nauto eth0\niface eth0 inet dhcp\n' | sudo tee -a "$VM/etc/network/interfaces" | ||
| echo -en "127.0.0.1\tlocalhost\n" | sudo tee "$VM/etc/hosts" | ||
| echo "nameserver 1.1.1.1" | sudo tee -a "$VM/etc/resolve.conf" | ||
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| # Set up mount points | ||
| echo 'debugfs /sys/kernel/debug debugfs defaults 0 0' | sudo tee -a "$VM/etc/fstab" | ||
| echo 'binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc defaults 0 0' | sudo tee -a "$VM/etc/fstab" | ||
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| # Set kernel options | ||
| echo 'SELINUX=disabled' | sudo tee "$VM/etc/selinux/config" | ||
| echo "kernel.printk = 7 4 1 3" | sudo tee -a "$VM/etc/sysctl.conf" | ||
| echo "net.ipv4.ping_group_range = 0 65535" | sudo tee -a "$VM/etc/sysctl.conf" | ||
| # To disable segfault messages: echo 'debug.exception-trace = 0' | sudo tee -a "$VM/etc/sysctl.conf" | ||
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| # Generate SSH key for use with the VM | ||
| ssh-keygen -f "$ROOT/id_rsa" -t rsa -N '' | ||
| sudo mkdir -p "$VM/root/.ssh/" | ||
| cat "$ROOT/id_rsa.pub" | sudo tee "$VM/root/.ssh/authorized_keys" | ||
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| # Build image | ||
| MOUNT=$(mktemp -d) | ||
| rm -f "$IMAGE" | ||
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| dd if=/dev/zero of="$IMAGE" bs=1M seek=2047 count=1 | ||
| sudo mkfs.ext4 -F "$IMAGE" | ||
| sudo mount -o loop "$IMAGE" "$MOUNT" | ||
| sudo cp -a "$VM/." "$MOUNT/." | ||
| sudo umount "$MOUNT" | ||
| sudo rmdir "$MOUNT" | ||
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| # Write boot scripts | ||
| cat > "$ROOT/run.sh" << EOF | ||
| #!/bin/sh | ||
| VMPATH="\$(dirname "\$(readlink -f "\$0")")" | ||
| qemu-system-x86_64 -kernel "$KERNEL/arch/x86/boot/bzImage" \\ | ||
| -append "console=ttyS0 root=/dev/sda debug earlyprintk=serial net.ifnames=0 rw" \\ | ||
| -hda "\$VMPATH/$IMAGENAME" \\ | ||
| -net user,hostfwd=tcp::20022-:22,hostfwd=tcp::1337-:31337 -net nic \\ | ||
| -enable-kvm -nographic -m 2G -smp 2 \\ | ||
| -pidfile "\$VMPATH/vm.pid" \\ | ||
| 2>&1 | tee "\$VMPATH/vm.log" | ||
| EOF | ||
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| cat > "$ROOT/ssh.sh" << EOF | ||
| #!/bin/sh | ||
| VMPATH="\$(dirname "\$(readlink -f "\$0")")" | ||
| ssh -i "$VMPATH/id_rsa" -p 20022 -o "StrictHostKeyChecking=no" -o "UserKnownHostsFile=/dev/null" root@localhost | ||
| EOF | ||
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| cat > "$ROOT/scp.sh" << EOF | ||
| #!/bin/bash | ||
| VMPATH="\$(dirname "\$(readlink -f "\$0")")" | ||
| FILES=\${@:1:\$#-1} | ||
| TARGET=\${@:\$#} | ||
| scp -i "$VMPATH/id_rsa" -P 20022 -o "StrictHostKeyChecking=no" -o "UserKnownHostsFile=/dev/null" \$FILES "root@localhost:\$TARGET" | ||
| EOF | ||
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| chmod a+x "$ROOT/run.sh" "$ROOT/ssh.sh" "$ROOT/scp.sh" |