Add missing isShellUser check

[android-x86/frameworks-base.git] / services / core / java / com / android / server / am / ActivityManagerService.java

diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index cf48dd6..2a1e3e6 100644 (file)
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -4260,9 +4260,18 @@ public class ActivityManagerService extends IActivityManager.Stub
         return procState;
     }
 
+    private boolean isCallerShell() {
+        final int callingUid = Binder.getCallingUid();
+        return callingUid == SHELL_UID || callingUid == ROOT_UID;
+    }
+
     @Override
     public boolean setProcessMemoryTrimLevel(String process, int userId, int level)
             throws RemoteException {
+        if (!isCallerShell()) {
+            EventLog.writeEvent(0x534e4554, 160390416, Binder.getCallingUid(), "");
+            throw new SecurityException("Only shell can call it");
+        }
         synchronized (this) {
             final ProcessRecord app = findProcessLocked(process, userId, "setProcessMemoryTrimLevel");
             if (app == null) {