From 0000000000000000000000000000000000000000 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] 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 d2cd591f604..be6fa0f4d45 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;