From: Paulo Flabiano Smorigo <pfsmorigo@canonical.com>
Date: Mon, 30 Nov 2020 13:36:00 +0000 (-0300)
Subject: loader/xnu: Check if pointer is NULL before using it
X-Git-Tag: grub-2.06-rc1~87
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c8a2b5d1421a0f2a33d33531f7561f3da93b844;p=thirdparty%2Fgrub.git

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>
---

diff --git a/grub-core/loader/xnu.c b/grub-core/loader/xnu.c
index 1a590dbc0..1c0cf6a43 100644
--- a/grub-core/loader/xnu.c
+++ b/grub-core/loader/xnu.c
@@ -670,6 +670,9 @@ 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, '/');
 
@@ -701,10 +704,7 @@ 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)
     {