From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Dmitry Muhomor Date: Thu, 15 Sep 2022 13:58:34 +0300 Subject: [PATCH] ignore pid when spoofing permission checks Permissions are enforced per-uid, checking pid may break spoofing for multi-process apps. --- core/java/android/app/ContextImpl.java | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/core/java/android/app/ContextImpl.java b/core/java/android/app/ContextImpl.java index f4e5f2959b87..932c79e5bf7c 100644 --- a/core/java/android/app/ContextImpl.java +++ b/core/java/android/app/ContextImpl.java @@ -2259,18 +2259,16 @@ class ContextImpl extends Context { if (permission == null) { throw new IllegalArgumentException("permission is null"); } - - final boolean selfCheck = pid == android.os.Process.myPid() && uid == android.os.Process.myUid(); - if (mParams.isRenouncedPermission(permission) - && selfCheck) { + && pid == android.os.Process.myPid() && uid == android.os.Process.myUid()) { Log.v(TAG, "Treating renounced permission " + permission + " as denied"); return PERMISSION_DENIED; } + int res = PermissionManager.checkPermission(permission, pid, uid, getDeviceId()); if (res != PERMISSION_GRANTED) { - if (selfCheck) { + if (uid == android.os.Process.myUid()) { if (AppPermissionUtils.shouldSpoofSelfCheck(permission)) { return PERMISSION_GRANTED; }