From 02aac2c52eb2c2aac2418d683bf270e50c0529b3 Mon Sep 17 00:00:00 2001
From: Elad Ashkenazi <18193363+elad335@users.noreply.github.com>
Date: Sun, 28 Jul 2024 11:26:44 +0300
Subject: [PATCH] sys_fs: Non-existant overflow bugfix

It would technically never overflow.. but this add minimal protection against adding beyond [PPU thread-count + entries count]
This does not induce an atomic loop which limits until entries.size() but is slower.
---
 rpcs3/Emu/Cell/lv2/sys_fs.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rpcs3/Emu/Cell/lv2/sys_fs.h b/rpcs3/Emu/Cell/lv2/sys_fs.h
index 32aa6010a6..d6acb6361b 100644
--- a/rpcs3/Emu/Cell/lv2/sys_fs.h
+++ b/rpcs3/Emu/Cell/lv2/sys_fs.h
@@ -384,7 +384,9 @@ struct lv2_dir final : lv2_fs_object
 	// Read next
 	const fs::dir_entry* dir_read()
 	{
-		if (const u64 cur = pos++; cur < entries.size())
+		const u64 old_pos = pos;
+
+		if (const u64 cur = (old_pos < entries.size() ? pos++ : old_pos); cur < entries.size())
 		{
 			return &entries[cur];
 		}