From f39f139103f8d06a0ec24f0d45e263f5c56a0c94 Mon Sep 17 00:00:00 2001
From: Tianjie Xu <xunchang@google.com>
Date: Fri, 7 Sep 2018 15:24:58 -0700
Subject: [PATCH] DO NOT MERGE: Initialize the ZipArchive to zero before
 parsing

The fields of the ZipArchive on the stack are not initialized before we
call libminzip to parse the zip file. As a result, some random memory
location is freed unintentionally when we close the ZipArchive upon
parsing failures.

Bug: 35385357
Test: recompile and run the poc with asan.
Change-Id: I7e7f8ab4816c84a158af7389e1a889f8fc65f079
---
 install.cpp         | 2 +-
 updater/updater.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/install.cpp b/install.cpp
index d30890a9..05209cdc 100644
--- a/install.cpp
+++ b/install.cpp
@@ -481,7 +481,7 @@ really_install_package(const char *path, bool* wipe_cache, bool needs_mount,
     }
 
     // Try to open the package.
-    ZipArchive zip;
+    ZipArchive zip = {};
     int err = mzOpenZipArchive(map.addr, map.length, &zip);
     if (err != 0) {
         LOGE("Can't open %s\n(%s)\n", path, err != -1 ? strerror(err) : "bad");
diff --git a/updater/updater.cpp b/updater/updater.cpp
index e956dd55..96755735 100644
--- a/updater/updater.cpp
+++ b/updater/updater.cpp
@@ -77,7 +77,7 @@ int main(int argc, char** argv) {
         printf("failed to map package %s\n", argv[3]);
         return 3;
     }
-    ZipArchive za;
+    ZipArchive za = {};
     int err;
     err = mzOpenZipArchive(map.addr, map.length, &za);
     if (err != 0) {