From 5409adf7826b430c8e9ae50578a8b151bc7e9ef2 Mon Sep 17 00:00:00 2001
From: hmz007 <hmz007@gmail.com>
Date: Sat, 19 Apr 2025 16:52:44 +0800
Subject: [PATCH] android: Ensure partitions are at least 1 block in size

Signed-off-by: hmz007 <hmz007@gmail.com>
Change-Id: Idc1aeb7d6a5e2ed539c129a53b732435218a1a65
---
 system/update_engine/payload_generator/generate_delta_main.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/system/update_engine/payload_generator/generate_delta_main.cc b/system/update_engine/payload_generator/generate_delta_main.cc
index 6616ee1c9f9..6861705b58e 100644
--- a/system/update_engine/payload_generator/generate_delta_main.cc
+++ b/system/update_engine/payload_generator/generate_delta_main.cc
@@ -465,7 +465,7 @@ void RoundDownPartitions(const ImageConfig& config) {
     if (part.path.empty()) {
       continue;
     }
-    const auto size = utils::FileSize(part.path);
+    const auto size = std::max<size_t>(utils::FileSize(part.path), kBlockSize);
     if (size % kBlockSize != 0) {
       const auto err =
           truncate(part.path.c_str(), size / kBlockSize * kBlockSize);