[PATCH] net: don't free uninitialized sockets in dns

[Josef Bacik]

If we cannot open a connection to our dns server we will have NULL sockets in
our array, so don't do the cleanup on any sockets that didn't get created.

Signed-off-by: Josef Bacik <address@hidden>
---
 grub-core/net/dns.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/grub-core/net/dns.c b/grub-core/net/dns.c
index 9d0c8fc..c356318 100644
--- a/grub-core/net/dns.c
+++ b/grub-core/net/dns.c
@@ -601,7 +601,10 @@ grub_net_dns_lookup (const char *name,
   grub_free (data.name);
   grub_netbuff_free (nb);
   for (j = 0; j < send_servers; j++)
-    grub_net_udp_close (sockets[j]);
+    {
+      if (sockets[j])
+       grub_net_udp_close (sockets[j]);
+    }
   
   grub_free (sockets);
 
-- 
1.8.1