DivestOS/Patches/LineageOS-17.1/android_frameworks_base/355765-backport.patch

82 lines
4.3 KiB
Diff
Raw Normal View History

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Daniel Norman <danielnorman@google.com>
Date: Thu, 9 Feb 2023 12:28:26 -0800
Subject: [PATCH] Checks if AccessibilityServiceInfo is within parcelable size.
- If too large when parsing service XMLs then skip this service.
- If too large when a service attempts to update its own info
then throw an error.
Bug: 261589597
Test: atest AccessibilityServiceInfoTest
Change-Id: Iffc0cd48cc713f7904d68059e141cb7de5a4b906
Merged-In: Iffc0cd48cc713f7904d68059e141cb7de5a4b906
(cherry picked from commit on googleplex-android-review.googlesource.com host: 553232c29079fbeab28f95307d025c1426aa7142)
Merged-In: Iffc0cd48cc713f7904d68059e141cb7de5a4b906
---
.../accessibilityservice/AccessibilityService.java | 4 ++++
.../accessibilityservice/AccessibilityServiceInfo.java | 10 ++++++++++
.../accessibility/AccessibilityManagerService.java | 6 ++++++
3 files changed, 20 insertions(+)
diff --git a/core/java/android/accessibilityservice/AccessibilityService.java b/core/java/android/accessibilityservice/AccessibilityService.java
index 90b80e73c323..5820dbee7e87 100644
--- a/core/java/android/accessibilityservice/AccessibilityService.java
+++ b/core/java/android/accessibilityservice/AccessibilityService.java
@@ -1585,6 +1585,10 @@ public abstract class AccessibilityService extends Service {
IAccessibilityServiceConnection connection =
AccessibilityInteractionClient.getInstance().getConnection(mConnectionId);
if (mInfo != null && connection != null) {
+ if (!mInfo.isWithinParcelableSize()) {
+ throw new IllegalStateException(
+ "Cannot update service info: size is larger than safe parcelable limits.");
+ }
try {
connection.setServiceInfo(mInfo);
mInfo = null;
diff --git a/core/java/android/accessibilityservice/AccessibilityServiceInfo.java b/core/java/android/accessibilityservice/AccessibilityServiceInfo.java
index cf24b8e1ffa6..3cb35a8723ab 100644
--- a/core/java/android/accessibilityservice/AccessibilityServiceInfo.java
+++ b/core/java/android/accessibilityservice/AccessibilityServiceInfo.java
@@ -31,6 +31,7 @@ import android.content.res.Resources;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.hardware.fingerprint.FingerprintManager;
+import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
@@ -850,6 +851,15 @@ public class AccessibilityServiceInfo implements Parcelable {
return 0;
}
+ /** @hide */
+ public final boolean isWithinParcelableSize() {
+ final Parcel parcel = Parcel.obtain();
+ writeToParcel(parcel, 0);
+ final boolean result = parcel.dataSize() <= IBinder.MAX_IPC_SIZE;
+ parcel.recycle();
+ return result;
+ }
+
public void writeToParcel(Parcel parcel, int flagz) {
parcel.writeInt(eventTypes);
parcel.writeStringArray(packageNames);
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index 457f27e679ef..194c90e125f9 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -1371,6 +1371,12 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub
AccessibilityServiceInfo accessibilityServiceInfo;
try {
accessibilityServiceInfo = new AccessibilityServiceInfo(resolveInfo, mContext);
+ if (!accessibilityServiceInfo.isWithinParcelableSize()) {
+ Slog.e(LOG_TAG, "Skipping service "
+ + accessibilityServiceInfo.getResolveInfo().getComponentInfo()
+ + " because service info size is larger than safe parcelable limits.");
+ continue;
+ }
mTempAccessibilityServiceInfoList.add(accessibilityServiceInfo);
} catch (XmlPullParserException | IOException xppe) {
Slog.e(LOG_TAG, "Error while initializing AccessibilityServiceInfo", xppe);