From 4f99d865cb091e6e8be7b4c989eb0e70fb3bae99 Mon Sep 17 00:00:00 2001
From: Scirese <62688390+Scirese@users.noreply.github.com>
Date: Sun, 15 Jan 2023 20:11:21 +0800
Subject: [PATCH] kernel: make kernel correctly response CMD_GRANT_ROOT (#73)

---
 kernel/ksu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/ksu.c b/kernel/ksu.c
index 8572ab57..59151514 100644
--- a/kernel/ksu.c
+++ b/kernel/ksu.c
@@ -240,6 +240,9 @@ static int handler_pre(struct kprobe *p, struct pt_regs *regs)
 		if (is_allow_su()) {
 			pr_info("allow root for: %d\n", current_uid());
 			escape_to_root();
+			if (copy_to_user(result, &reply_ok, sizeof(reply_ok))) {
+				pr_err("grant_root: prctl reply error\n");
+			}
 		} else {
 			pr_info("deny root for: %d\n", current_uid());
 			// add it to deny list!