From 9034086ad4fd9392bb0d61d012774814ee795ba2 Mon Sep 17 00:00:00 2001
From: Rifat Azad <33044977+rifsxd@users.noreply.github.com>
Date: Fri, 11 Jul 2025 19:32:58 +0600
Subject: [PATCH] kernel: added new prctl CMD_GET_MANAGER_UID to get the uid of
 the crowned manager (#2673)

---
 kernel/core_hook.c | 11 +++++++++++
 kernel/ksu.h       |  1 +
 2 files changed, 12 insertions(+)

diff --git a/kernel/core_hook.c b/kernel/core_hook.c
index cf44fa3f..c8690f04 100644
--- a/kernel/core_hook.c
+++ b/kernel/core_hook.c
@@ -413,6 +413,17 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
 		return 0;
 	}
 
+	if (arg2 == CMD_GET_MANAGER_UID) {
+		uid_t manager_uid = ksu_get_manager_uid();
+		if (copy_to_user(arg3, &manager_uid, sizeof(manager_uid))) {
+			pr_err("get manager uid failed\n");
+		}
+		if (copy_to_user(result, &reply_ok, sizeof(reply_ok))) {
+			pr_err("prctl reply error, cmd: %lu\n", arg2);
+		}
+		return 0;
+	}
+
 	// all other cmds are for 'root manager'
 	if (!from_manager) {
 		return 0;
diff --git a/kernel/ksu.h b/kernel/ksu.h
index e5050024..75a0d9aa 100644
--- a/kernel/ksu.h
+++ b/kernel/ksu.h
@@ -23,6 +23,7 @@
 #define CMD_UID_SHOULD_UMOUNT 13
 #define CMD_IS_SU_ENABLED 14
 #define CMD_ENABLE_SU 15
+#define CMD_GET_MANAGER_UID 16
 
 #define EVENT_POST_FS_DATA 1
 #define EVENT_BOOT_COMPLETED 2