Hide magisk internal mount point

topjohnwu · Dec 22, 2023 · deedb46 · deedb46
1 parent c48962b
commit deedb46
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/native/src/core/daemon.cpp b/native/src/core/daemon.cpp
@@ -392,6 +392,13 @@ static void daemon_entry() {
     ssprintf(path, sizeof(path), "%s/" ROOTOVL, tmp);
     rm_rf(path);
 
+    // Unshare magiskd
+    xunshare(CLONE_NEWNS);
+    // Hide magisk internal mount point
+    xmount(nullptr, tmp, nullptr, MS_PRIVATE | MS_REC, nullptr);
+    // Fix sdcardfs bug on old kernel
+    xmount(nullptr, "/mnt", nullptr, MS_SLAVE | MS_REC, nullptr);
+
     // Use isolated devpts if kernel support
     if (access("/dev/pts/ptmx", F_OK) == 0) {
         ssprintf(path, sizeof(path), "%s/" SHELLPTS, tmp);