grub2/SOURCES/0424-loader-xnu-Check-if-pointer-is-NULL-before-using-it.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paulo Flabiano Smorigo <pfsmorigo@canonical.com>
Date: Mon, 30 Nov 2020 10:36:00 -0300
Subject: [PATCH] loader/xnu: Check if pointer is NULL before using it

Fixes: CID 73654

Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@canonical.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/loader/xnu.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/grub-core/loader/xnu.c b/grub-core/loader/xnu.c
index af885a648c6..49641b8bbc2 100644
--- a/grub-core/loader/xnu.c
+++ b/grub-core/loader/xnu.c
@@ -671,6 +671,9 @@ grub_xnu_load_driver (char *infoplistname, grub_file_t binaryfile,
   char *name, *nameend;
   int namelen;
 
+  if (infoplistname == NULL)
+    return grub_error (GRUB_ERR_BAD_FILENAME, N_("missing p-list filename"));
+
   name = get_name_ptr (infoplistname);
   nameend = grub_strchr (name, '/');
 
@@ -702,10 +705,7 @@ grub_xnu_load_driver (char *infoplistname, grub_file_t binaryfile,
   else
     macho = 0;
 
-  if (infoplistname)
-    infoplist = grub_file_open (infoplistname, GRUB_FILE_TYPE_XNU_INFO_PLIST);
-  else
-    infoplist = 0;
+  infoplist = grub_file_open (infoplistname, GRUB_FILE_TYPE_XNU_INFO_PLIST);
   grub_errno = GRUB_ERR_NONE;
   if (infoplist)
     {