From cab5d30d4cb182ee9dfd03079b415e1e0285de99 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bernhard=20=C3=9Cbelacker?= <bernhardu@vr-web.de>
Date: Mon, 20 Jul 2015 14:06:45 +0200
Subject: [PATCH 233/237] loader/linux: Make trailer initrd entry aligned
 again.

Regression from commit:
  loader/linux: do not pad initrd with zeroes at the end
  a8c473288d3f0a5e17a903a5121dea1a695dda3b

Wimboot fails since the change above because it expects the "trailer"
initrd element on an aligned address.
This issue shows only when newc_name is used and the last initrd
entry has a not aligned size.
---
 grub-core/loader/linux.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/grub-core/loader/linux.c b/grub-core/loader/linux.c
index d2cd591..be6fa0f 100644
--- a/grub-core/loader/linux.c
+++ b/grub-core/loader/linux.c
@@ -213,6 +213,7 @@ grub_initrd_init (int argc, char *argv[],
 
   if (newc)
     {
+      initrd_ctx->size = ALIGN_UP (initrd_ctx->size, 4);
       initrd_ctx->size += ALIGN_UP (sizeof (struct newc_head)
 				    + sizeof ("TRAILER!!!") - 1, 4);
       free_dir (root);
@@ -290,7 +291,11 @@ grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
       ptr += cursize;
     }
   if (newc)
-    ptr = make_header (ptr, "TRAILER!!!", sizeof ("TRAILER!!!") - 1, 0, 0);
+    {
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
+      ptr = make_header (ptr, "TRAILER!!!", sizeof ("TRAILER!!!") - 1, 0, 0);
+    }
   free_dir (root);
   root = 0;
   return GRUB_ERR_NONE;
-- 
2.9.3

