From a6917465d775c69dd18a922834cafd156df2cf7f Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sun, 17 Jan 2021 21:32:59 +0100
Subject: [PATCH] Kernel: Assert on attempt to mark inode metadata dirty on
 read-only FS

---
 Kernel/FileSystem/Inode.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Kernel/FileSystem/Inode.cpp b/Kernel/FileSystem/Inode.cpp
index f74598ea41..7923c66f27 100644
--- a/Kernel/FileSystem/Inode.cpp
+++ b/Kernel/FileSystem/Inode.cpp
@@ -230,6 +230,12 @@ NonnullRefPtr<FIFO> Inode::fifo()
 void Inode::set_metadata_dirty(bool metadata_dirty)
 {
     LOCKER(m_lock);
+
+    if (metadata_dirty) {
+        // Sanity check.
+        ASSERT(!fs().is_readonly());
+    }
+
     if (m_metadata_dirty == metadata_dirty)
         return;