Blame SOURCES/0177-Fix-grub_net_hwaddr_to_str.patch

8631a2
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
8631a2
From: Mark Salter <msalter@redhat.com>
8631a2
Date: Tue, 22 Aug 2017 12:21:12 -0400
8631a2
Subject: [PATCH] Fix grub_net_hwaddr_to_str
8631a2
8631a2
commit 5c3b78c92f8 introduced support for larger network hw addresses.
8631a2
However, grub_net_hwaddr_to_str() relies on GRUB_NET_MAX_STR_ADDRESS_SIZE
8631a2
to prevent a spurious ':' at the end of the string. So now, if actual
8631a2
hwaddr size is less than max, an extra ':' appears at the end of the
8631a2
string. So calculate max string size based on actual hwaddr length to
8631a2
fix the problem.
8631a2
8631a2
Signed-off-by: Mark Salter <msalter@redhat.com>
8631a2
---
8631a2
 grub-core/net/net.c | 4 +++-
8631a2
 1 file changed, 3 insertions(+), 1 deletion(-)
8631a2
8631a2
diff --git a/grub-core/net/net.c b/grub-core/net/net.c
8631a2
index a0f4d00f0be..191e8e41bd6 100644
8631a2
--- a/grub-core/net/net.c
8631a2
+++ b/grub-core/net/net.c
8631a2
@@ -770,6 +770,7 @@ grub_net_hwaddr_to_str (const grub_net_link_level_address_t *addr, char *str)
8631a2
 {
8631a2
   char *ptr;
8631a2
   unsigned i;
8631a2
+  int maxstr;
8631a2
 
8631a2
   if (addr->len > GRUB_NET_MAX_LINK_ADDRESS_SIZE)
8631a2
     {
8631a2
@@ -778,9 +779,10 @@ grub_net_hwaddr_to_str (const grub_net_link_level_address_t *addr, char *str)
8631a2
 		    addr->type, addr->len);
8631a2
        return;
8631a2
     }
8631a2
+  maxstr = addr->len * grub_strlen ("XX:");
8631a2
   for (ptr = str, i = 0; i < addr->len; i++)
8631a2
     {
8631a2
-      ptr += grub_snprintf (ptr, GRUB_NET_MAX_STR_HWADDR_LEN - (ptr - str),
8631a2
+      ptr += grub_snprintf (ptr, maxstr - (ptr - str),
8631a2
 		     "%02x:", addr->mac[i] & 0xff);
8631a2
     }
8631a2
 }