From: Daniel Kiper <daniel.kiper@oracle.com>
Date: Thu, 22 Jun 2023 21:48:52 +0000 (+0200)
Subject: lib/relocator: Enforce GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT divisibility by 8
X-Git-Tag: grub-2.12-rc1~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5658f35af97d34af5c8013ce3e206c82e422d67f;p=thirdparty%2Fgrub.git

lib/relocator: Enforce GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT divisibility by 8

Most of leftover code blindly assumes GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT
divisibility by 8. So, enforce this at compile time.

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

diff --git a/grub-core/lib/relocator.c b/grub-core/lib/relocator.c
index 725bca7c3..568fc0b8f 100644
--- a/grub-core/lib/relocator.c
+++ b/grub-core/lib/relocator.c
@@ -478,6 +478,8 @@ malloc_in_range (struct grub_relocator *rel,
 
 #if GRUB_RELOCATOR_HAVE_LEFTOVERS
   {
+    COMPILE_TIME_ASSERT (GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT % 8 == 0);
+
     struct grub_relocator_fw_leftover *cur;
     for (cur = leftovers; cur; cur = cur->next)
       {