From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Sun, 13 Aug 2023 07:18:53 +0000 (+0200)
Subject: gpt: Add compile time asserts for guid and gpt_partentry sizes
X-Git-Tag: grub-2.12~42
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64e3cee72ab8f5876abfebb263b5e6cf7c4a9a4e;p=thirdparty%2Fgrub.git

gpt: Add compile time asserts for guid and gpt_partentry sizes

With new alignment specification it's easy to screw up. Fortunately if it
happens the size will be bigger than intended. Compile time assert will catch
this.

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---

diff --git a/grub-core/partmap/gpt.c b/grub-core/partmap/gpt.c
index 877ceefc3..426f616ae 100644
--- a/grub-core/partmap/gpt.c
+++ b/grub-core/partmap/gpt.c
@@ -229,6 +229,9 @@ static struct grub_partition_map grub_gpt_partition_map =
 
 GRUB_MOD_INIT(part_gpt)
 {
+  COMPILE_TIME_ASSERT(sizeof(grub_guid_t) == 16);
+  COMPILE_TIME_ASSERT(sizeof(grub_packed_guid_t) == 16);
+  COMPILE_TIME_ASSERT(sizeof(struct grub_gpt_partentry) == 128);
   grub_partition_map_register (&grub_gpt_partition_map);
 }