diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 52053abd9eb54..490fb6850a3d4 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -21035,6 +21035,9 @@ public final class ActivityManagerService extends ActivityManagerNative
         int nextEmptyAdj = curEmptyAdj+2;
         for (int i=N-1; i>=0; i--) {
             ProcessRecord app = mLruProcesses.get(i);
+            if (app == null) {
+                continue;
+            }
             if (!app.killedByAm && app.thread != null) {
                 app.procStateChanged = false;
                 computeOomAdjLocked(app, ProcessList.UNKNOWN_ADJ, TOP_APP, true, now);
@@ -21210,6 +21213,9 @@ public final class ActivityManagerService extends ActivityManagerNative
             int curLevel = ComponentCallbacks2.TRIM_MEMORY_COMPLETE;
             for (int i=N-1; i>=0; i--) {
                 ProcessRecord app = mLruProcesses.get(i);
+                if (app == null) {
+                    continue;
+                }
                 if (allChanged || app.procStateChanged) {
                     setProcessTrackerStateLocked(app, trackerMemFactor, now);
                     app.procStateChanged = false;