如何修复android emulator（goldfish内核和android-9）引导循环中的sepolicy错误

我想在android-9（API 28）avd上运行定制内核（goldfish）。 所以我刚下载了金鱼内核：

    git clone https://android.googlesource.com/kernel/goldfish/ -b android-4.4
    make x86_64_ranchu_defconfig
    make -j4

然后我运行emulator：

   emulator -avd test -kernel goldfish/arch/x86/boot/bzImage -show-kernel

但我的内核和供应商的SELinux策略之间存在一些错误。 以下是日志：

[    1.170669] init: init first stage started!
[    1.172289] init: Using Android DT directory /sys/bus/platform/devices/ANDR0001:00/properties/android/
[    1.174652] init: First stage mount skipped (missing/incompatible fstab in device tree)
[    1.176724] init: Skipped setting INIT_AVB_VERSION (not in recovery mode)
[    1.178464] init: Loading SELinux policy
[    1.182955] init: No precompiled sepolicy: No such file or directory
[    1.184557] init: Compiling SELinux policy
[    1.185672] init: Failed to read /vendor/etc/selinux/plat_sepolicy_vers.txt: No such file or directory
[    1.188030] init: Unable to load SELinux policy
[    1.189192] init: Reboot start, reason: reboot, rebootTarget: bootloader

显然，系统进入引导循环。 我怎样才能解决这个问题