From 7f25350c628a9f5da4fe816ef0738b4c8791dc40 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Thu, 16 Jul 2026 10:04:21 +0300
Subject: [PATCH] LibC: Fix malloc mmap byte tracking

I was incrementing instead of decrementing when freeing mmap allocs
---
 userspace/libraries/LibC/malloc.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/userspace/libraries/LibC/malloc.cpp b/userspace/libraries/LibC/malloc.cpp
index 884aba96..a43939cb 100644
--- a/userspace/libraries/LibC/malloc.cpp
+++ b/userspace/libraries/LibC/malloc.cpp
@@ -305,7 +305,7 @@ void free(void* ptr)
 
 	const auto& header = static_cast<MmapAllocationHeader*>(ptr)[-1];
 	s_mmap_count--;
-	s_mmap_bytes += header.mmap_size;
+	s_mmap_bytes -= header.mmap_size;
 	munmap(static_cast<uint8_t*>(ptr) - header.offset, header.mmap_size);
 }