From 69899fa72e39553a23461dbc29b6210c979b9fdd Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Wed, 2 Oct 2024 13:27:44 -0400
Subject: [PATCH] kernel/vm: Truncate swap files when disabling or starting
 with swap disabled.

Fixes #4843.
---
 src/system/kernel/vm/VMAnonymousCache.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/system/kernel/vm/VMAnonymousCache.cpp b/src/system/kernel/vm/VMAnonymousCache.cpp
index 04bae4bbfe..78721f1a80 100644
--- a/src/system/kernel/vm/VMAnonymousCache.cpp
+++ b/src/system/kernel/vm/VMAnonymousCache.cpp
@@ -1531,6 +1531,7 @@ swap_file_delete(const char* path)
 		* B_PAGE_SIZE;
 	mutex_unlock(&sAvailSwapSpaceLock);
 
+	truncate(path, 0);
 	close(swapFile->fd);
 	radix_bitmap_destroy(swapFile->bmp);
 	delete swapFile;
@@ -1659,6 +1660,7 @@ swap_init_post_modules()
 
 	if (!swapEnabled || swapSize < B_PAGE_SIZE) {
 		dprintf("%s: virtual_memory is disabled\n", __func__);
+		truncate(kDefaultSwapPath, 0);
 		return;
 	}