From cb28250cfce1da059d94b57eee54cb250bb786fe Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Mon, 9 Nov 2015 03:24:04 +0100
Subject: [PATCH] cbfs: Fix corner case and compilation with recdent gcc

Accept the header to touch the jump address at 0xfffffff0.

Fix compilation for 64-bit EFI with recent GCC.
---
 grub-core/fs/cbfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/fs/cbfs.c b/grub-core/fs/cbfs.c
index 5fc9c0147..0842701a6 100644
--- a/grub-core/fs/cbfs.c
+++ b/grub-core/fs/cbfs.c
@@ -352,7 +352,7 @@ init_cbfsdisk (void)
      reading ROMs through controller directly.
    */
   if (ptr < 0xff000000
-      || 0xffffffff - ptr < sizeof (*head) + 0x10
+      || 0xffffffff - ptr < (grub_uint32_t) sizeof (*head) + 0xf
       || !validate_head (head))
     return;