From da46dfbde11aa8c4aa90915e0d2bd02f59d7a337 Mon Sep 17 00:00:00 2001
From: 5ec1cff <56485584+5ec1cff@users.noreply.github.com>
Date: Sat, 13 May 2023 16:17:22 +0800
Subject: [PATCH] ksud: use MS_RDONLY when mounting overlayfs (#490)

fix https://github.com/tiann/KernelSU/issues/489
---
 userspace/ksud/src/mount.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/userspace/ksud/src/mount.rs b/userspace/ksud/src/mount.rs
index 424f02e8..37b49723 100644
--- a/userspace/ksud/src/mount.rs
+++ b/userspace/ksud/src/mount.rs
@@ -149,6 +149,7 @@ fn mount_overlayfs(
     Mount::builder()
         .fstype(FilesystemType::from("overlay"))
         .data(&options)
+        .flags(MountFlags::RDONLY)
         .mount(KSU_OVERLAY_SOURCE, dest.as_ref())
         .with_context(|| {
             format!(