Revert "Sync with latest official KernelSU commit 4d3560b12bec5f238fe11f908a246f0ac97e9c27"

This reverts commit dd29fa162a.

kernel/Makefile

@@ -189,7 +189,7 @@ $(eval SUSFS_VERSION=$(shell cat $(srctree)/include/linux/susfs.h | grep -E '^#d
 $(info )
 $(info -- SUSFS_VERSION: $(SUSFS_VERSION))
 else
-$(info -- You have not integrated susfs in your kernel yet.)
+$(info -- You have not integrate susfs in your kernel.)
 $(info -- Read: https://gitlab.com/simonpunk/susfs4ksu)
 endif
 

kernel/core_hook.c

@@ -495,12 +495,12 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
 		switch (arg3) {
 		case EVENT_POST_FS_DATA: {
 			static bool post_fs_data_lock = false;
-			if (!post_fs_data_lock) {
-				post_fs_data_lock = true;
-				pr_info("post-fs-data triggered\n");
 #ifdef CONFIG_KSU_SUSFS
 			susfs_on_post_fs_data();
 #endif
+			if (!post_fs_data_lock) {
+				post_fs_data_lock = true;
+				pr_info("post-fs-data triggered\n");
 				on_post_fs_data();
 				// Initialize throne communication
 				ksu_throne_comm_init();
@@ -1135,11 +1135,6 @@ static bool is_non_appuid(kuid_t uid)
 	return appid < FIRST_APPLICATION_UID;
 }
 
-static inline bool is_some_system_uid(uid_t uid)
-{
-	return uid >= 1000 && uid < 10000;
-}
-
 static bool should_umount(struct path *path)
 {
 	if (!path) {
@@ -1242,11 +1237,11 @@ static void try_umount(const char *mnt, bool check_mnt, int flags)
 void susfs_try_umount_all(uid_t uid) {
 	susfs_try_umount(uid);
 	/* For Legacy KSU only */
-	try_umount("/odm", true, 0, uid);
 	try_umount("/system", true, 0, uid);
 	try_umount("/system_ext", true, 0, uid);
 	try_umount("/vendor", true, 0, uid);
 	try_umount("/product", true, 0, uid);
+	try_umount("/odm", true, 0, uid);
 	// - For '/data/adb/modules' we pass 'false' here because it is a loop device that we can't determine whether 
 	//   its dev_name is KSU or not, and it is safe to just umount it if it is really a mountpoint
 	try_umount("/data/adb/modules", false, MNT_DETACH, uid);
@@ -1284,16 +1279,50 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
 	}
 
 #ifdef CONFIG_KSU_SUSFS
+	// check if current process is zygote
 	bool is_zygote_child = susfs_is_sid_equal(old->security, susfs_zygote_sid);
-	if (is_some_system_uid(new_uid.val) && is_zygote_child) {
+#endif // #ifdef CONFIG_KSU_SUSFS
-		if (ksu_is_allow_uid(new_uid.val)) {
+	if (likely(is_zygote_child)) {
-			return 0;
+		// if spawned process is non user app process
-		}
+		if (unlikely(new_uid.val < 10000 && new_uid.val >= 1000)) {
 #ifdef CONFIG_KSU_SUSFS_SUS_SU
-		susfs_set_current_proc_su_not_allowed();
+			// set flag if zygote spawned system process is allowed for root access
+			if (!ksu_is_allow_uid(new_uid.val)) {
+				task_lock(current);
+				susfs_set_current_proc_su_not_allowed();
+				task_unlock(current);
+			}
 #endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
-		if (susfs_is_umount_for_zygote_system_process_enabled) {
+#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
-			goto do_umount;
+			// umount for the system process if path DATA_ADB_UMOUNT_FOR_ZYGOTE_SYSTEM_PROCESS exists
+			if (susfs_is_umount_for_zygote_system_process_enabled) {
+				goto out_try_umount;
+			}
+#endif // #ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
+		}
+#ifdef CONFIG_KSU_SUSFS
+		// - here we check if uid is a isolated service spawned by zygote directly
+		// - Apps that do not use "useAppZyogte" to start a isolated service will be directly
+		//   spawned by zygote which KSU will ignore it by default, the only fix for now is to
+		//   force a umount for those uid
+		// - Therefore make sure your root app doesn't use isolated service for root access
+		// - Kudos to ThePedroo, the author and maintainer of Rezygisk for finding and reporting
+		//   the detection, really big helps here!
+		else if (new_uid.val >= 90000 && new_uid.val < 1000000) {
+			task_lock(current);
+			susfs_set_current_non_root_user_app_proc();
+#ifdef CONFIG_KSU_SUSFS_SUS_SU
+			susfs_set_current_proc_su_not_allowed();
+#endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
+			task_unlock(current);
+#ifdef CONFIG_KSU_SUSFS_SUS_PATH
+			susfs_run_sus_path_loop(new_uid.val);
+#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
+#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
+			if (susfs_is_umount_for_zygote_iso_service_enabled) {
+			goto out_susfs_try_umount_all;
+		}
+	#endif // #ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
 		}
 	}
 #endif // #ifdef CONFIG_KSU_SUSFS
@@ -1310,26 +1339,32 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
 #ifdef CONFIG_KSU_DEBUG
 		pr_info("handle umount for unsupported application uid: %d\n", new_uid.val);
 #endif
-#ifdef CONFIG_KSU_SUSFS
-		susfs_set_current_non_root_user_app_proc();
-#endif // #ifdef CONFIG_KSU_SUSFS
-#ifdef CONFIG_KSU_SUSFS_SUS_SU
-		susfs_set_current_proc_su_not_allowed();
-#endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
-#ifdef CONFIG_KSU_SUSFS_SUS_PATH
-		susfs_run_sus_path_loop(new_uid.val);
-#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
 		goto do_umount;
 	}
 
-
 	if (ksu_is_allow_uid(new_uid.val)) {
 #ifdef CONFIG_KSU_DEBUG
 		pr_info("handle setuid ignore allowed application: %d\n", new_uid.val);
 #endif
 		return 0;
 	}
+#ifdef CONFIG_KSU_SUSFS
+	else {
+		task_lock(current);
+		susfs_set_current_non_root_user_app_proc();
+#ifdef CONFIG_KSU_SUSFS_SUS_SU
+		susfs_set_current_proc_su_not_allowed();
+#endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
+		task_unlock(current);
+#ifdef CONFIG_KSU_SUSFS_SUS_PATH
+		susfs_run_sus_path_loop(new_uid.val);
+#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
+	}
+#endif // #ifdef CONFIG_KSU_SUSFS
 
+#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
+out_try_umount:
+#endif
 	if (!ksu_uid_should_umount(new_uid.val)) {
 		return 0;
 	} else {
@@ -1337,42 +1372,24 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
 		pr_info("uid: %d should not umount!\n", current_uid().val);
 #endif
 	}
-
 do_umount:
 	// check old process's selinux context, if it is not zygote, ignore it!
 	// because some su apps may setuid to untrusted_app but they are in global mount namespace
 	// when we umount for such process, that is a disaster!
-#ifdef CONFIG_KSU_SUSFS
-	if (!is_zygote_child) {
-#else
 	if (!is_zygote(old->security)) {
-#endif
 		pr_info("handle umount ignore non zygote child: %d\n",
 			current->pid);
 		return 0;
 	}
-#ifdef CONFIG_KSU_DEBUG
-	// umount the target mnt
-	pr_info("handle umount for uid: %d, pid: %d\n", new_uid.val,
-		current->pid);
-#endif
 
-#ifdef CONFIG_KSU_SUSFS
+
-	susfs_set_current_non_root_user_app_proc();
-#endif
-#ifdef CONFIG_KSU_SUSFS_SUS_SU
-	susfs_set_current_proc_su_not_allowed();
-#endif // #ifdef CONFIG_KSU_SUSFS_SUS_SU
-#ifdef CONFIG_KSU_SUSFS_SUS_PATH
-	susfs_run_sus_path_loop(new_uid.val);
-#endif // #ifdef CONFIG_KSU_SUSFS_SUS_PATH
 #ifdef CONFIG_KSU_SUSFS_TRY_UMOUNT
+out_susfs_try_umount_all:
 	// susfs come first, and lastly umount by ksu, make sure umount in reversed order
 	susfs_try_umount_all(new_uid.val);
 #else
 	// fixme: use `collect_mounts` and `iterate_mount` to iterate all mountpoint and
 	// filter the mountpoint whose target is `/data/adb`
-	try_umount("/odm", true, 0);
 	try_umount("/system", true, 0);
 	try_umount("/vendor", true, 0);
 	try_umount("/product", true, 0);
@@ -1386,7 +1403,7 @@ do_umount:
 
 	// try umount ksu temp path
 	try_umount("/debug_ramdisk", false, MNT_DETACH);
-
+	
 	// try umount ksu su path
 	try_umount("/sbin", false, MNT_DETACH);