0036-gpt-include-backup-in-sync-check-in-revalidation.patch

From 23ce2d3a2b0422c725b1cfb0c61fccba595f8b9b Mon Sep 17 00:00:00 2001
From: Michael Marineau <michael.marineau@coreos.com>
Date: Wed, 21 Sep 2016 15:01:09 -0700
Subject: [PATCH] gpt: include backup-in-sync check in revalidation

---
 grub-core/lib/gpt.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/grub-core/lib/gpt.c b/grub-core/lib/gpt.c
index 3ac2987..c27bcc5 100644
--- a/grub-core/lib/gpt.c
+++ b/grub-core/lib/gpt.c
@@ -372,6 +372,11 @@ grub_gpt_check_backup (grub_gpt_t gpt)
   if (backup <= end)
     return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid backup GPT LBA");
 
+  /* If both primary and backup are valid but differ prefer the primary.  */
+  if ((gpt->status & GRUB_GPT_PRIMARY_HEADER_VALID) &&
+      !grub_gpt_headers_equal (gpt))
+    return grub_error (GRUB_ERR_BAD_PART_TABLE, "backup GPT out of sync");
+
   return GRUB_ERR_NONE;
 }
 
@@ -435,11 +440,6 @@ grub_gpt_read_backup (grub_disk_t disk, grub_gpt_t gpt)
   if (grub_le_to_cpu64 (gpt->backup.header_lba) != sector)
     return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid backup GPT LBA");
 
-  /* If both primary and backup are valid but differ prefer the primary.  */
-  if ((gpt->status & GRUB_GPT_PRIMARY_HEADER_VALID) &&
-      !grub_gpt_headers_equal(gpt))
-    return grub_error (GRUB_ERR_BAD_PART_TABLE, "backup GPT of of sync");
-
   gpt->status |= GRUB_GPT_BACKUP_HEADER_VALID;
   return GRUB_ERR_NONE;
 }
-- 
2.21.3