DivestOS/Patches/LineageOS-16.0/android_frameworks_base/364607.patch
Tavi 082bc48c32
16.0: Import and verify picks
https://review.lineageos.org/q/topic:P_asb_2022-05
https://review.lineageos.org/q/topic:P_asb_2022-06
https://review.lineageos.org/q/topic:P_asb_2022-07
https://review.lineageos.org/q/topic:P_asb_2022-08
https://review.lineageos.org/q/topic:P_asb_2022-09
https://review.lineageos.org/q/topic:P_asb_2022-10
https://review.lineageos.org/q/topic:P_asb_2022-11
https://review.lineageos.org/q/topic:P_asb_2022-12
https://review.lineageos.org/q/topic:P_asb_2023-01
https://review.lineageos.org/q/topic:P_asb_2023-02
https://review.lineageos.org/q/topic:P_asb_2023-03
https://review.lineageos.org/q/topic:P_asb_2023-04
https://review.lineageos.org/q/topic:P_asb_2023-05
https://review.lineageos.org/q/topic:P_asb_2023-06
https://review.lineageos.org/q/topic:P_asb_2023-07
	accounted for via manifest change:
	https://review.lineageos.org/c/LineageOS/android_external_freetype/+/361250
https://review.lineageos.org/q/topic:P_asb_2023-08
	accounted for via manifest change:
	https://review.lineageos.org/c/LineageOS/android_external_freetype/+/364606
	accounted for via patches:
	https://review.lineageos.org/c/LineageOS/android_system_ca-certificates/+/365328
https://review.lineageos.org/q/topic:P_asb_2023-09
https://review.lineageos.org/q/topic:P_asb_2023-10
https://review.lineageos.org/q/topic:P_asb_2023-11
	accounted for via patches:
	https://review.lineageos.org/c/LineageOS/android_system_ca-certificates/+/374916
https://review.lineageos.org/q/topic:P_asb_2023-12
https://review.lineageos.org/q/topic:P_asb_2024-01
https://review.lineageos.org/q/topic:P_asb_2024-02
https://review.lineageos.org/q/topic:P_asb_2024-03
https://review.lineageos.org/q/topic:P_asb_2024-04

Signed-off-by: Tavi <tavi@divested.dev>
2024-05-07 19:43:19 -04:00

110 lines
4.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jing Ji <jji@google.com>
Date: Tue, 25 Oct 2022 22:39:52 -0700
Subject: [PATCH] DO NOT MERGE: ActivityManager#killBackgroundProcesses can
kill caller's own app only
unless it's a system app.
Bug: 239423414
Bug: 223376078
Test: atest CtsAppTestCases:ActivityManagerTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:8b382775b258220466a977453905797521e159de)
Merged-In: Iac6baa889965b8ffecd9a43179a4c96632ad1d02
Change-Id: Iac6baa889965b8ffecd9a43179a4c96632ad1d02
---
core/java/android/app/ActivityManager.java | 3 ++
core/res/AndroidManifest.xml | 6 +++-
.../server/am/ActivityManagerService.java | 32 +++++++++++++++++--
3 files changed, 38 insertions(+), 3 deletions(-)
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index 83630f4c3693..51411c9e208e 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -3615,6 +3615,9 @@ public class ActivityManager {
* processes to reclaim memory; the system will take care of restarting
* these processes in the future as needed.
*
+ * <p class="note">Third party applications can only use this API to kill their own processes.
+ * </p>
+ *
* @param packageName The name of the package whose processes are to
* be killed.
*/
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 0aafab66dabd..d23501a86b79 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2092,7 +2092,11 @@
android:protectionLevel="normal" />
<!-- Allows an application to call
- {@link android.app.ActivityManager#killBackgroundProcesses}.
+ {@link android.app.ActivityManager#killBackgroundProcesses}.
+
+ <p class="note">Third party applications can only use this API to kill their own
+ processes.</p>
+
<p>Protection level: normal
-->
<permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index f522b20f7ccd..44761a523abb 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -6810,8 +6810,20 @@ public class ActivityManagerService extends IActivityManager.Stub
Slog.w(TAG, msg);
throw new SecurityException(msg);
}
+ final int callingUid = Binder.getCallingUid();
+ final int callingPid = Binder.getCallingPid();
+ final int callingAppId = UserHandle.getAppId(callingUid);
- userId = mUserController.handleIncomingUser(Binder.getCallingPid(), Binder.getCallingUid(),
+ ProcessRecord proc;
+ synchronized (mPidsSelfLocked) {
+ proc = mPidsSelfLocked.get(callingPid);
+ }
+ final boolean hasKillAllPermission = PERMISSION_GRANTED == checkPermission(
+ android.Manifest.permission.FORCE_STOP_PACKAGES, callingPid, callingUid)
+ || UserHandle.isCore(callingUid)
+ || (proc != null && proc.info.isSystemApp());
+
+ userId = mUserController.handleIncomingUser(callingPid, callingUid,
userId, true, ALLOW_FULL_ONLY, "killBackgroundProcesses", null);
final int[] userIds = mUserController.expandUserId(userId);
@@ -6826,7 +6838,7 @@ public class ActivityManagerService extends IActivityManager.Stub
targetUserId));
} catch (RemoteException e) {
}
- if (appId == -1) {
+ if (appId == -1 || (!hasKillAllPermission && appId != callingAppId)) {
Slog.w(TAG, "Invalid packageName: " + packageName);
return;
}
@@ -6851,6 +6863,22 @@ public class ActivityManagerService extends IActivityManager.Stub
throw new SecurityException(msg);
}
+ final int callingUid = Binder.getCallingUid();
+ final int callingPid = Binder.getCallingPid();
+
+ ProcessRecord proc;
+ synchronized (mPidsSelfLocked) {
+ proc = mPidsSelfLocked.get(callingPid);
+ }
+ if (callingUid >= FIRST_APPLICATION_UID
+ && (proc == null || !proc.info.isSystemApp())) {
+ final String msg = "Permission Denial: killAllBackgroundProcesses() from pid="
+ + callingPid + ", uid=" + callingUid + " is not allowed";
+ Slog.w(TAG, msg);
+ // Silently return to avoid existing apps from crashing.
+ return;
+ }
+
final long callingId = Binder.clearCallingIdentity();
try {
synchronized (this) {