[VM] Override address size limit to unlimited

build-vm-docker

@@ -32,6 +32,9 @@ vm_startup_docker() {
     docker rm "$name" >/dev/null 2>&1 || true
     local docker_opts=
     test -n "$VM_TYPE_PRIVILEGED" && docker_opts="--privileged --cap-add=SYS_ADMIN --cap-add=MKNOD"
+    # Override memory restriction set by stage1. Docker does not support
+    # --ulimit as=... for some reason.
+    ulimit -v 'unlimited'
     docker run \
         --rm --name "$name" --net=none $docker_opts \
         --mount "type=bind,source=$BUILD_ROOT,destination=/mnt" \

build-vm-kvm

@@ -358,6 +358,8 @@ vm_startup_kvm() {
 	set -- linux64 "$@"
     fi
     export QEMU_AUDIO_DRV=none		# we do not want to have sound inside the VMs
+    # Allow overcommit, the total memory will already be constrained by qemu.
+    ulimit -v 'unlimited'
     echo "$@"
     "$@"
     qemu_ret=$?

build-vm-nspawn

@@ -37,7 +37,7 @@ vm_startup_nspawn() {
     if test -n "$VM_TYPE_PRIVILEGED"; then
        privileged_opt=--privileged 
     fi
-    systemd-nspawn -D "$BUILD_ROOT" -M "$name" --private-network $pipe_opt $privileged_opt "$vm_init_script"
+    systemd-nspawn -D "$BUILD_ROOT" -M "$name" --private-network $pipe_opt $privileged_opt "$vm_init_script" --rlimit=RLIMIT_AS=infinity
     BUILDSTATUS="$?"
     cleanup_and_exit "$BUILDSTATUS"
 }

build-vm-qemu

@@ -200,6 +200,8 @@ vm_startup_qemu() {
         set -- linux64 "$@"
     fi
     export QEMU_AUDIO_DRV=none          # we do not want to have sound inside the VMs
+    # Allow overcommit, the total memory will already be constrained by qemu.
+    ulimit -v 'unlimited'
     echo "$@"
     "$@"
     qemu_ret=$?

build-vm-uml

@@ -30,6 +30,9 @@ vm_verify_options_uml() {
 
 vm_startup_uml() {
     set -- $uml_kernel initrd=$uml_initrd root=ubda init="$vm_init_script" $vm_linux_always_append elevator=noop ubda=$VM_ROOT ubdb=$VM_SWAP ${VM_MEMSIZE:+mem=$VM_MEMSIZE}
+    # Allow overcommit, the total memory will (most of the time?) already be
+    # constrained by UML.
+    ulimit -v 'unlimited'
     echo "$@"
     "$@"
 }

build-vm-xen

@@ -88,6 +88,8 @@ vm_startup_xen() {
 	# have to switch back to PER_LINUX to make xm work
 	set -- linux64 "$@"
     fi
+    # Allow overcommit, the total memory will already be constrained by Xen.
+    ulimit -v 'unlimited'
     echo "$@"
     "$@" || cleanup_and_exit 3
     rm -f "$XEN_CONF_FILE"

lxc.conf

@@ -18,3 +18,8 @@ lxc.cgroup.devices.allow = c 5:2 rw
 # console
 lxc.console = none
 lxc.console.logfile = /dev/stdout
+
+# Override build script limit (which is only supposed to trigger for non-VM
+# builds, but is actually also applied on package building initialization
+# time) and breaks address sanitizers.
+lxc.prlimit.as = unlimited