From d38b6703c0668e5d99e6f00aeef5d1b1d7458f9a Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Sun, 19 Jul 2020 16:08:08 -0400
Subject: [PATCH 302/314] emu: make grub_free(NULL) safe

The grub_free() implementation in kern/mm.c safely handles NULL
pointers, and code at many places depends on this.  We don't know that
the same is true on all host OSes, so we need to handle the same
behavior in grub-emu's implementation.

Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Upstream-commit-id: 96bb109e658
---
 grub-core/kern/emu/mm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/grub-core/kern/emu/mm.c b/grub-core/kern/emu/mm.c
index 145b01d3719..4d1046a219e 100644
--- a/grub-core/kern/emu/mm.c
+++ b/grub-core/kern/emu/mm.c
@@ -60,7 +60,8 @@ grub_zalloc (grub_size_t size)
 void
 grub_free (void *ptr)
 {
-  free (ptr);
+  if (ptr)
+    free (ptr);
 }
 
 void *
-- 
2.26.2