--- nono/host/diskimage_raw.cpp	2026/04/29 17:05:00	1.1.1.2
+++ nono/host/diskimage_raw.cpp	2026/04/29 17:05:11	1.1.1.3
@@ -110,7 +110,7 @@ DiskImageRaw::Read(void *buf, off_t offs
 	if (__predict_false(fd < 0)) {
 		return false;
 	}
-	if (__predict_false(offset + size >= GetSize())) {
+	if (__predict_false(offset + size > GetSize())) {
 		return false;
 	}
 
@@ -130,7 +130,7 @@ DiskImageRaw::Write(const void *buf, off
 	if (__predict_false(fd < 0)) {
 		return false;
 	}
-	if (__predict_false(offset + size >= GetSize())) {
+	if (__predict_false(offset + size > GetSize())) {
 		return false;
 	}