File 0001-ofnet-Initialize-structs-in-bootpath-parser.patch of Package grub2

From ddd47864e98cb32a718075bab4462dc56919ec6c Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <julian.klode@canonical.com>
Date: Mon, 3 Sep 2018 10:09:15 +0200
Subject: [PATCH] ofnet: Initialize structs in bootpath parser

Code later on checks if variables inside the struct are
0 to see if they have been set, like if there were addresses
in the bootpath.

The variables were not initialized however, so the check
might succeed with uninitialized data, and a new interface
with random addresses and the same name is added. This causes
$net_default_mac to point to the random one, so, for example,
using that variable to load per-mac config files fails.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/1785859
Signed-off-by: Julian Andres Klode <julian.klode@canonical.com>
---
 grub-core/net/drivers/ieee1275/ofnet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: grub-2.02/grub-core/net/drivers/ieee1275/ofnet.c
===================================================================
--- grub-2.02.orig/grub-core/net/drivers/ieee1275/ofnet.c
+++ grub-2.02/grub-core/net/drivers/ieee1275/ofnet.c
@@ -153,8 +153,8 @@ grub_ieee1275_parse_bootpath (const char
   char *comma_char = 0;
   char *equal_char = 0;
   grub_size_t field_counter = 0;
-  grub_net_network_level_address_t client_addr, gateway_addr, subnet_mask;
-  grub_net_link_level_address_t hw_addr;
+  grub_net_network_level_address_t client_addr = {}, gateway_addr = {}, subnet_mask = {};
+  grub_net_link_level_address_t hw_addr = {};
   grub_net_interface_flags_t flags = 0;
   struct grub_net_network_level_interface *inter = NULL;
   grub_uint32_t vlantag = 0;