From 674e4608eeaa3e7805eef19d6a809e75ed13b753 Mon Sep 17 00:00:00 2001
From: Kevin O'Connor <kevin@koconnor.net>
Date: Mon, 13 Apr 2009 19:19:22 -0400
Subject: [PATCH] Make sure optionroms have a non-zero size before using them.

---
 src/optionroms.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/optionroms.c b/src/optionroms.c
index 6bc28fa..f3c4cfd 100644
--- a/src/optionroms.c
+++ b/src/optionroms.c
@@ -113,6 +113,8 @@ is_valid_rom(struct rom_header *rom)
 {
     if (rom->signature != OPTION_ROM_SIGNATURE)
         return 0;
+    if (! rom->size)
+        return 0;
     u32 len = rom->size * 512;
     u8 sum = checksum(rom, len);
     if (sum != 0) {
-- 
2.25.1