From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Peter Jones <pjones@redhat.com>

Date: Sun, 19 Jul 2020 16:08:08 -0400

Subject: [PATCH] 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 *