From 38bee23d8925fa1f33394f6c40b68c16a984e6c0 Mon Sep 17 00:00:00 2001
From: Dylan Reid <dgreid@fb.com>
Date: Mon, 4 May 2026 23:32:52 -0700
Subject: [PATCH] vmm: memory_manager: free memslot in remove_userspace_mapping

remove_userspace_mapping tears down the KVM mapping but never returns
the slot id to the allocator's free list. Call `free_memory_slot` to
avoid the leak.

Signed-off-by: Dylan Reid <dgreid@fb.com>
---
 vmm/src/memory_manager.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vmm/src/memory_manager.rs b/vmm/src/memory_manager.rs
index 18e0b86b6..bebcc8fa4 100644
--- a/vmm/src/memory_manager.rs
+++ b/vmm/src/memory_manager.rs
@@ -2563,6 +2563,8 @@ impl MemoryManager {
             userspace_addr_ = userspace_addr as u64
         );
 
+        self.memory_slot_allocator().free_memory_slot(slot);
+
         Ok(())
     }