grub2/0291-grub-core-net-http.c-Fix-bad-free.patch

From 20f0e206ae3a863c3e9e3a5a198fbac1aa549514 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Fri, 12 Apr 2013 20:17:53 +0200
Subject: [PATCH 291/482] 	* grub-core/net/http.c: Fix bad free.

---
 ChangeLog            |  4 ++++
 grub-core/net/http.c | 15 ++++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ced68cc..79563b8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2013-04-12  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	* grub-core/net/http.c: Fix bad free.
+
+2013-04-12  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	* grub-core/net/drivers/ieee1275/ofnet.c: Don't attempt to send more
 	than buffer size.
 
diff --git a/grub-core/net/http.c b/grub-core/net/http.c
index a7542d1..4684f8b 100644
--- a/grub-core/net/http.c
+++ b/grub-core/net/http.c
@@ -157,9 +157,10 @@ http_err (grub_net_tcp_socket_t sock __attribute__ ((unused)),
 
   if (data->sock)
     grub_net_tcp_close (data->sock, GRUB_NET_TCP_ABORT);
+  data->sock = 0;
   if (data->current_line)
     grub_free (data->current_line);
-  grub_free (data);
+  data->current_line = 0;
   file->device->net->eof = 1;
   file->device->net->stall = 1;
   if (file->size == GRUB_FILE_SIZE_UNKNOWN)
@@ -175,6 +176,12 @@ http_receive (grub_net_tcp_socket_t sock __attribute__ ((unused)),
   http_data_t data = file->data;
   grub_err_t err;
 
+  if (!data->sock)
+    {
+      grub_netbuff_free (nb);
+      return GRUB_ERR_NONE;
+    }
+
   while (1)
     {
       char *ptr = (char *) nb->data;
@@ -432,7 +439,8 @@ http_seek (struct grub_file *file, grub_off_t off)
   grub_err_t err;
   old_data = file->data;
   /* FIXME: Reuse socket?  */
-  grub_net_tcp_close (old_data->sock, GRUB_NET_TCP_ABORT);
+  if (old_data->sock)
+    grub_net_tcp_close (old_data->sock, GRUB_NET_TCP_ABORT);
   old_data->sock = 0;
 
   while (file->device->net->packs.first)
@@ -529,7 +537,8 @@ http_packets_pulled (struct grub_file *file)
 
   if (!file->device->net->eof)
     file->device->net->stall = 0;
-  grub_net_tcp_unstall (data->sock);
+  if (data && data->sock)
+    grub_net_tcp_unstall (data->sock);
   return 0;
 }
 
-- 
1.8.2.1