grub2/0003-grub-core-loader-i386-linux.c-find_efi_mmap_size-Don.patch

From ec6a8c449294b215a2c4019f42110a0c1f770ac2 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Mon, 2 Jul 2012 11:14:37 +0200
Subject: [PATCH 003/482] 	* grub-core/loader/i386/linux.c
 (find_efi_mmap_size): Don't decrease 	efi_mmap_size. 	Reported by: Stuart
 Hayes.

---
 ChangeLog                     | 6 ++++++
 grub-core/loader/i386/linux.c | 7 +++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index f6e864a..53ad372 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2012-07-02  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/loader/i386/linux.c (find_efi_mmap_size): Don't decrease
+	efi_mmap_size.
+	Reported by: Stuart Hayes.
+
 2012-06-28  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Add monochrome text support (mda_text, aka `hercules' in grub-legacy).
diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
index 62087cf..d34b2f8 100644
--- a/grub-core/loader/i386/linux.c
+++ b/grub-core/loader/i386/linux.c
@@ -118,12 +118,13 @@ find_efi_mmap_size (void)
       int ret;
       grub_efi_memory_descriptor_t *mmap;
       grub_efi_uintn_t desc_size;
+      grub_efi_uintn_t cur_mmap_size = mmap_size;
 
-      mmap = grub_malloc (mmap_size);
+      mmap = grub_malloc (cur_mmap_size);
       if (! mmap)
 	return 0;
 
-      ret = grub_efi_get_memory_map (&mmap_size, mmap, 0, &desc_size, 0);
+      ret = grub_efi_get_memory_map (&cur_mmap_size, mmap, 0, &desc_size, 0);
       grub_free (mmap);
 
       if (ret < 0)
@@ -134,6 +135,8 @@ find_efi_mmap_size (void)
       else if (ret > 0)
 	break;
 
+      if (mmap_size < cur_mmap_size)
+	mmap_size = cur_mmap_size;
       mmap_size += (1 << 12);
     }
 
-- 
1.8.2.1