diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index a1f7445d41424..af9b2beb998aa 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -4925,14 +4925,8 @@ public class ActivityManagerService extends IActivityManager.Stub
         EventLogTags.writeAmProcBound(app.userId, pid, app.processName);
 
         synchronized (mProcLock) {
-            app.mState.setCurAdj(ProcessList.INVALID_ADJ);
-            app.mState.setSetAdj(ProcessList.INVALID_ADJ);
-            app.mState.setVerifiedAdj(ProcessList.INVALID_ADJ);
-            mOomAdjuster.setAttachingSchedGroupLSP(app);
-            app.mState.setForcingToImportant(null);
+            mOomAdjuster.setAttachingProcessStatesLSP(app);
             clearProcessForegroundLocked(app);
-            app.mState.setHasShownUi(false);
-            app.mState.setCached(false);
             app.setDebugging(false);
             app.setKilledByAm(false);
             app.setKilled(false);
@@ -5100,8 +5094,14 @@ public class ActivityManagerService extends IActivityManager.Stub
                 app.makeActive(thread, mProcessStats);
                 checkTime(startTime, "attachApplicationLocked: immediately after bindApplication");
             }
+            app.setPendingFinishAttach(true);
+
             updateLruProcessLocked(app, false, null);
             checkTime(startTime, "attachApplicationLocked: after updateLruProcessLocked");
+
+            updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_PROCESS_BEGIN);
+            checkTime(startTime, "attachApplicationLocked: after updateOomAdjLocked");
+
             final long now = SystemClock.uptimeMillis();
             synchronized (mAppProfiler.mProfilerLock) {
                 app.mProfile.setLastRequestedGc(now);
@@ -5117,8 +5117,6 @@ public class ActivityManagerService extends IActivityManager.Stub
 
             if (!mConstants.mEnableWaitForFinishAttachApplication) {
                 finishAttachApplicationInner(startSeq, callingUid, pid);
-            } else {
-                app.setPendingFinishAttach(true);
             }
         } catch (Exception e) {
             // We need kill the process group here. (b/148588589)
diff --git a/services/core/java/com/android/server/am/OomAdjuster.java b/services/core/java/com/android/server/am/OomAdjuster.java
index 679cf0a5694b1..086b77b03f57c 100644
--- a/services/core/java/com/android/server/am/OomAdjuster.java
+++ b/services/core/java/com/android/server/am/OomAdjuster.java
@@ -1259,12 +1259,19 @@ public class OomAdjuster {
         for (int i = numLru - 1; i >= 0; i--) {
             ProcessRecord app = lruList.get(i);
             final ProcessStateRecord state = app.mState;
-            if (!app.isKilledByAm() && app.getThread() != null && !app.isPendingFinishAttach()) {
+            if (!app.isKilledByAm() && app.getThread() != null) {
                 // We don't need to apply the update for the process which didn't get computed
                 if (state.getCompletedAdjSeq() == mAdjSeq) {
                     applyOomAdjLSP(app, true, now, nowElapsed, oomAdjReason);
                 }
 
+                if (app.isPendingFinishAttach()) {
+                    // Avoid trimming processes that are still initializing. If they aren't
+                    // hosting any components yet because they may be unfairly killed.
+                    // We however apply any computed previously computed oom scores before skipping.
+                    continue;
+                }
+
                 final ProcessServiceRecord psr = app.mServices;
                 // Count the number of process types.
                 switch (state.getCurProcState()) {
@@ -1698,6 +1705,19 @@ public class OomAdjuster {
             return false;
         }
 
+        if (app.isPendingFinishAttach()) {
+            state.setAdjSeq(mAdjSeq);
+            state.setCompletedAdjSeq(mAdjSeq);
+            // If the process is still initializing, we skip computing any states because we
+            // don't want to override the special states that have been set at
+            // AMS#attachApplication with OomAdjuster#setAttachingProcessStates.
+            // In this limbo state, the app has |PROC_START_TIMEOUT| to finish attach application
+            // and receive updated proc_state based on its importance.
+            // Note that in this state, the oom_score is INVALID_ADJ which is outside the standard
+            // oom score range and the app is safe from lmkd kills.
+            return false;
+        }
+
         state.setAdjTypeCode(ActivityManager.RunningAppProcessInfo.REASON_UNKNOWN);
         state.setAdjSource(null);
         state.setAdjTarget(null);
@@ -3211,7 +3231,7 @@ public class OomAdjuster {
     }
 
     @GuardedBy({"mService", "mProcLock"})
-    void setAttachingSchedGroupLSP(ProcessRecord app) {
+    void setAttachingProcessStatesLSP(ProcessRecord app) {
         int initialSchedGroup = SCHED_GROUP_DEFAULT;
         final ProcessStateRecord state = app.mState;
         // If the process has been marked as foreground, it is starting as the top app (with
@@ -3231,6 +3251,15 @@ public class OomAdjuster {
 
         state.setSetSchedGroup(initialSchedGroup);
         state.setCurrentSchedulingGroup(initialSchedGroup);
+        state.setCurProcState(PROCESS_STATE_CACHED_EMPTY);
+        state.setCurCapability(PROCESS_CAPABILITY_NONE);
+
+        state.setCurAdj(ProcessList.FOREGROUND_APP_ADJ);
+        state.setSetAdj(ProcessList.FOREGROUND_APP_ADJ);
+        state.setVerifiedAdj(ProcessList.FOREGROUND_APP_ADJ);
+        state.setForcingToImportant(null);
+        state.setHasShownUi(false);
+        state.setCached(true);
     }
 
     // ONLY used for unit testing in OomAdjusterTests.java
diff --git a/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java b/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java
index 485ce33dfb7d5..0b4c70c285c1f 100644
--- a/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java
+++ b/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java
@@ -1966,6 +1966,36 @@ public class MockingOomAdjusterTests {
         assertBfsl(app1);
     }
 
+    @SuppressWarnings("GuardedBy")
+    @Test
+    public void testUpdateOomAdj_DoOne_PendingFinishAttach() {
+        ProcessRecord app = spy(makeDefaultProcessRecord(MOCKAPP_PID, MOCKAPP_UID,
+                MOCKAPP_PROCESSNAME, MOCKAPP_PACKAGENAME, false));
+        app.setPendingFinishAttach(true);
+        app.mState.setHasForegroundActivities(false);
+
+        sService.mOomAdjuster.setAttachingProcessStatesLSP(app);
+        updateOomAdj(app);
+
+        assertProcStates(app, PROCESS_STATE_CACHED_EMPTY, FOREGROUND_APP_ADJ,
+                SCHED_GROUP_DEFAULT);
+    }
+
+    @SuppressWarnings("GuardedBy")
+    @Test
+    public void testUpdateOomAdj_DoOne_TopApp_PendingFinishAttach() {
+        ProcessRecord app = spy(makeDefaultProcessRecord(MOCKAPP_PID, MOCKAPP_UID,
+                MOCKAPP_PROCESSNAME, MOCKAPP_PACKAGENAME, false));
+        app.setPendingFinishAttach(true);
+        app.mState.setHasForegroundActivities(true);
+
+        sService.mOomAdjuster.setAttachingProcessStatesLSP(app);
+        updateOomAdj(app);
+
+        assertProcStates(app, PROCESS_STATE_CACHED_EMPTY, FOREGROUND_APP_ADJ,
+                SCHED_GROUP_TOP_APP);
+    }
+
     @SuppressWarnings("GuardedBy")
     @Test
     public void testUpdateOomAdj_UidIdle_StopService() {