From 68624ad31b65da2012af2f7bdf2d0f29faa4ba4c Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Sun, 16 Jun 2024 12:48:31 -0300
Subject: [PATCH] pmm: add assert against use after free

---
 kernel-src/mm/pmm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel-src/mm/pmm.c b/kernel-src/mm/pmm.c
index 46c0ade7..0a8c6ddb 100644
--- a/kernel-src/mm/pmm.c
+++ b/kernel-src/mm/pmm.c
@@ -168,6 +168,7 @@ void *pmm_allocpage(int section) {
 		page = freelists[i];
 		if (page) {
 			removefromfreelist(page);
+			__assert(page->refcount == 0);
 			break;
 		}
 	}