From 292ed050658338a4e29804035dec4c2922f94a6d Mon Sep 17 00:00:00 2001
From: JoseAaronLopezGarcia <joseaaronlopez@gmail.com>
Date: Sat, 27 Jul 2024 21:43:17 +0200
Subject: [PATCH] add safety checks

---
 core/popcorn/main.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/core/popcorn/main.c b/core/popcorn/main.c
index c8cbe749..ea8cde5a 100644
--- a/core/popcorn/main.c
+++ b/core/popcorn/main.c
@@ -451,7 +451,14 @@ static int myIoRead(int fd, unsigned char *buf, int size)
             if (offset == 0) break;
 
             if (offset+0x400 == pos && size-0x20 >= config_size){
-                memcpy(buf+0x20, custom_config, config_size);
+                char magic[12];
+                sceIoLseek(fd, offset, PSP_SEEK_SET);
+                sceIoRead(fd, magic, sizeof(magic));
+                sceIoLseek(fd, pos+size, PSP_SEEK_SET);
+                if (strncmp(magic, "PSISOIMG", 8) == 0){
+                    memcpy(buf+0x20, custom_config, config_size);
+                }
+                break;
             }
         }
     }