From 7df5188942809cc363a76f15de02ad29db3b6d20 Mon Sep 17 00:00:00 2001
From: Danny Lin <danny@kdrag0n.dev>
Date: Thu, 14 Jan 2021 00:05:36 -0800
Subject: [PATCH] post-fs-data: Ignore empty vendor security patch levels

---
 post-fs-data.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/post-fs-data.sh b/post-fs-data.sh
index 404cd3b..deaff3e 100755
--- a/post-fs-data.sh
+++ b/post-fs-data.sh
@@ -5,8 +5,8 @@ set -eufo pipefail
 system_patch="$(getprop ro.build.version.security_patch)"
 vendor_patch="$(getprop ro.vendor.build.security_patch)"
 
-# Fix mismatching security patch levels
-if [[ "$system_patch" != "$vendor_patch" ]]; then
+# Fix mismatching security patch levels if vendor patch is not empty
+if [[ ! -z "$vendor_patch" ]] && [[ "$system_patch" != "$vendor_patch" ]]; then
     resetprop ro.build.version.security_patch "$vendor_patch"
     resetprop ro.build.version.real_security_patch "$system_patch"
 fi