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[RESTRICT AUTOMERGE][pm] prevent system app downgrades of versions lower than preload am: 224da6d4c2

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21159679

Change-Id: Ibdce6507134448d3dc0bb3f86b0f739b3bfb5287
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Songchun Fan
2023-02-01 22:03:56 +00:00
committed by Automerger Merge Worker
parent d01df7fec4 224da6d4c2
commit d9092a87e5
1 changed files with 22 additions and 3 deletions
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25
services/core/java/com/android/server/pm/InstallPackageHelper.java
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@@ -2425,10 +2425,10 @@ final class InstallPackageHelper {
// will be null whereas dataOwnerPkg will contain information about the package
// which was uninstalled while keeping its data.
AndroidPackage dataOwnerPkg = mPm.mPackages.get(packageName);
PackageSetting dataOwnerPs = mPm.mSettings.getPackageLPr(packageName);
if (dataOwnerPkg == null) {
PackageSetting ps = mPm.mSettings.getPackageLPr(packageName);
if (ps != null) {
dataOwnerPkg = ps.getPkg();
if (dataOwnerPs != null) {
dataOwnerPkg = dataOwnerPs.getPkg();
}
}
@@ -2456,6 +2456,7 @@ final class InstallPackageHelper {
if (dataOwnerPkg != null && !dataOwnerPkg.isSdkLibrary()) {
if (!PackageManagerServiceUtils.isDowngradePermitted(installFlags,
dataOwnerPkg.isDebuggable())) {
// Downgrade is not permitted; a lower version of the app will not be allowed
try {
PackageManagerServiceUtils.checkDowngrade(dataOwnerPkg, pkgLite);
} catch (PackageManagerException e) {
@@ -2464,6 +2465,24 @@ final class InstallPackageHelper {
return Pair.create(
PackageManager.INSTALL_FAILED_VERSION_DOWNGRADE, errorMsg);
}
} else if (dataOwnerPs.isSystem()) {
// Downgrade is permitted, but system apps can't be downgraded below
// the version preloaded onto the system image
final PackageSetting disabledPs = mPm.mSettings.getDisabledSystemPkgLPr(
dataOwnerPs);
if (disabledPs != null) {
dataOwnerPkg = disabledPs.getPkg();
}
try {
PackageManagerServiceUtils.checkDowngrade(dataOwnerPkg, pkgLite);
} catch (PackageManagerException e) {
String errorMsg = "System app: " + packageName + " cannot be downgraded to"
+ " older than its preloaded version on the system image. "
+ e.getMessage();
Slog.w(TAG, errorMsg);
return Pair.create(
PackageManager.INSTALL_FAILED_VERSION_DOWNGRADE, errorMsg);
}
}
}
}