import android.graphics.Bitmap;
import android.hardware.display.DisplayManager;
import android.net.Uri;
+import android.os.AsyncTask;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
* <p>
* Currently, there are three cases in which this can occur:
* <ol>
- * <li>The calling application is a "special" process. The special
- * processes are {@link Process#SYSTEM_UID}, {@link Process#SHELL_UID}
- * and {@code 0}</li>
+ * <li>The calling application is a "special" process. Special processes
+ * are those with a UID < {@link Process#FIRST_APPLICATION_UID}.</li>
* <li>The calling application has the permission
- * {@link android.Manifest.permission#ACCESS_INSTANT_APPS}</li>
+ * {@link android.Manifest.permission#ACCESS_INSTANT_APPS}.</li>
* <li>The calling application is the default launcher on the
* system partition.</li>
* </ol>
*/
private boolean canViewInstantApps(int callingUid, int userId) {
- if (callingUid == Process.SYSTEM_UID
- || callingUid == Process.SHELL_UID
- || callingUid == Process.ROOT_UID) {
+ if (callingUid < Process.FIRST_APPLICATION_UID) {
return true;
}
if (mContext.checkCallingOrSelfPermission(
}
/**
+ * We might auto-grant permissions if any permission of the group is already granted. Hence if
+ * the group of a granted permission changes we need to revoke it to avoid having permissions of
+ * the new group auto-granted.
+ *
+ * @param newPackage The new package that was installed
+ * @param oldPackage The old package that was updated
+ * @param allPackageNames All package names
+ */
+ private void revokeRuntimePermissionsIfGroupChanged(
+ PackageParser.Package newPackage,
+ PackageParser.Package oldPackage,
+ ArrayList<String> allPackageNames) {
+ final int numOldPackagePermissions = oldPackage.permissions.size();
+ final ArrayMap<String, String> oldPermissionNameToGroupName
+ = new ArrayMap<>(numOldPackagePermissions);
+
+ for (int i = 0; i < numOldPackagePermissions; i++) {
+ final PackageParser.Permission permission = oldPackage.permissions.get(i);
+
+ if (permission.group != null) {
+ oldPermissionNameToGroupName.put(permission.info.name,
+ permission.group.info.name);
+ }
+ }
+
+ final int numNewPackagePermissions = newPackage.permissions.size();
+ for (int newPermissionNum = 0; newPermissionNum < numNewPackagePermissions;
+ newPermissionNum++) {
+ final PackageParser.Permission newPermission =
+ newPackage.permissions.get(newPermissionNum);
+ final int newProtection = newPermission.info.protectionLevel;
+
+ if ((newProtection & PermissionInfo.PROTECTION_DANGEROUS) != 0) {
+ final String permissionName = newPermission.info.name;
+ final String newPermissionGroupName =
+ newPermission.group == null ? null : newPermission.group.info.name;
+ final String oldPermissionGroupName = oldPermissionNameToGroupName.get(
+ permissionName);
+
+ if (newPermissionGroupName != null
+ && !newPermissionGroupName.equals(oldPermissionGroupName)) {
+ final List<UserInfo> users = mContext.getSystemService(UserManager.class)
+ .getUsers();
+
+ final int numUsers = users.size();
+ for (int userNum = 0; userNum < numUsers; userNum++) {
+ final int userId = users.get(userNum).id;
+ final int numPackages = allPackageNames.size();
+
+ for (int packageNum = 0; packageNum < numPackages; packageNum++) {
+ final String packageName = allPackageNames.get(packageNum);
+
+ if (checkPermission(permissionName, packageName, userId)
+ == PackageManager.PERMISSION_GRANTED) {
+ EventLog.writeEvent(0x534e4554, "72710897",
+ newPackage.applicationInfo.uid,
+ "Revoking permission", permissionName, "from package",
+ packageName, "as the group changed from",
+ oldPermissionGroupName, "to", newPermissionGroupName);
+
+ try {
+ revokeRuntimePermission(packageName, permissionName, userId,
+ false);
+ } catch (IllegalArgumentException e) {
+ Slog.e(TAG, "Could not revoke " + permissionName + " from "
+ + packageName, e);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+
+ /**
* Get the first event id for the permission.
*
* <p>There are four events for each permission: <ul>
String primaryCpuAbiFromSettings = null;
String secondaryCpuAbiFromSettings = null;
+ final PackageParser.Package oldPkg;
+
// writer
synchronized (mPackages) {
if (pkg.mSharedUserId != null) {
final PackageSetting disabledPkgSetting =
mSettings.getDisabledSystemPkgLPr(pkg.packageName);
+ if (oldPkgSetting == null) {
+ oldPkg = null;
+ } else {
+ oldPkg = oldPkgSetting.pkg;
+ }
+
String[] usesStaticLibraries = null;
if (pkg.usesStaticLibraries != null) {
usesStaticLibraries = new String[pkg.usesStaticLibraries.size()];
mInstantAppRegistry.addInstantAppLPw(userId, pkgSetting.appId);
}
}
+
+ if (oldPkg != null) {
+ // We need to call revokeRuntimePermissionsIfGroupChanged async as permission
+ // revokation from this method might need to kill apps which need the
+ // mPackages lock on a different thread. This would dead lock.
+ //
+ // Hence create a copy of all package names and pass it into
+ // revokeRuntimePermissionsIfGroupChanged. Only for those permissions might get
+ // revoked. If a new package is added before the async code runs the permission
+ // won't be granted yet, hence new packages are no problem.
+ final ArrayList<String> allPackageNames = new ArrayList<>(mPackages.keySet());
+
+ AsyncTask.execute(new Runnable() {
+ public void run() {
+ revokeRuntimePermissionsIfGroupChanged(pkg, oldPkg, allPackageNames);
+ }
+ });
+ }
+
return pkg;
}
@Override
public boolean isPackageDeviceAdminOnAnyUser(String packageName) {
final int callingUid = Binder.getCallingUid();
+ if (checkUidPermission(android.Manifest.permission.MANAGE_USERS, callingUid)
+ != PERMISSION_GRANTED) {
+ EventLog.writeEvent(0x534e4554, "128599183", -1, "");
+ throw new SecurityException(android.Manifest.permission.MANAGE_USERS
+ + " permission is required to call this API");
+ }
if (getInstantAppPackageName(callingUid) != null
&& !isCallerSameApp(packageName, callingUid)) {
return false;
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