Kernel: Add some InodeVMObject type assertions in Region::clone()

Let's make sure that we're never cloning shared inode-backed objects
as if they were private, and vice versa.

1 files changed, 6 insertions, 0 deletions

diff --git a/Kernel/VM/Region.cpp b/Kernel/VM/Region.cpp
index a9f6b69727..dbe4e363c8 100644
--- a/Kernel/VM/Region.cpp
+++ b/Kernel/VM/Region.cpp
@@ -71,6 +71,9 @@ NonnullOwnPtr<Region> Region::clone()
 #ifdef MM_DEBUG
         dbg() << "Region::clone(): Sharing " << name() << " (" << vaddr() << ")";
 #endif
+        if (vmobject().is_inode())
+            ASSERT(vmobject().is_shared_inode());
+
         // Create a new region backed by the same VMObject.
         auto region = Region::create_user_accessible(m_range, m_vmobject, m_offset_in_vmobject, m_name, m_access);
         region->set_mmap(m_mmap);
@@ -78,6 +81,9 @@ NonnullOwnPtr<Region> Region::clone()
         return region;
     }
 
+    if (vmobject().is_inode())
+        ASSERT(vmobject().is_private_inode());
+
 #ifdef MM_DEBUG
     dbg() << "Region::clone(): CoWing " << name() << " (" << vaddr() << ")";
 #endif