From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 26 Jun 2017 12:42:57 -0400
Subject: [PATCH] Don't use dynamic sized arrays since we don't build with
 -std=c99

---
 grub-core/net/net.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index 4be228d9576..fa3e2912643 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -1853,14 +1853,25 @@ grub_net_search_configfile (char *config)
     {
       /* By the Client UUID. */
 
-      char client_uuid_var[sizeof ("net_") + grub_strlen (inf->name) +
-                           sizeof ("_clientuuid") + 1];
-      grub_snprintf (client_uuid_var, sizeof (client_uuid_var),
+      char *client_uuid_var;
+      grub_size_t client_uuid_var_size;
+
+      client_uuid_var_size = grub_snprintf (NULL, 0,
+                     "net_%s_clientuuid", inf->name);
+      if (client_uuid_var_size <= 0)
+	continue;
+      client_uuid_var_size += 1;
+      client_uuid_var = grub_malloc(client_uuid_var_size);
+      if (!client_uuid_var)
+	continue;
+      grub_snprintf (client_uuid_var, client_uuid_var_size,
                      "net_%s_clientuuid", inf->name);
 
       const char *client_uuid;
       client_uuid = grub_env_get (client_uuid_var);
 
+      grub_free(client_uuid_var);
+
       if (client_uuid)
         {
           grub_strcpy (suffix, client_uuid);
