branch_butter.patch: Don't free an uninitialised pointer if /proc is

unmounted (LP: #697493).

debian/changelog

@@ -1,3 +1,10 @@
+grub2 (1.99~20110106-2) UNRELEASED; urgency=low
+
+  * branch_butter.patch: Don't free an uninitialised pointer if /proc is
+    unmounted (LP: #697493).
+
+ -- Colin Watson <cjwatson@debian.org>  Fri, 07 Jan 2011 17:27:01 +0000
+
 grub2 (1.99~20110106-1) experimental; urgency=low
 
   * New Bazaar snapshot.

debian/patches/branch_butter.patch

@@ -1861,7 +1861,7 @@ Index: b/grub-core/kern/emu/getroot.c
 ===================================================================
 --- a/grub-core/kern/emu/getroot.c
 +++ b/grub-core/kern/emu/getroot.c
-@@ -103,8 +103,8 @@
+@@ -103,14 +103,17 @@
     can't deal with the multiple-device case yet, but in the meantime, we can
     at least cope with the single-device case by scanning
     /proc/self/mountinfo.  */
@@ -1872,16 +1872,15 @@ Index: b/grub-core/kern/emu/getroot.c
  {
    FILE *fp;
    char *buf = NULL;
-@@ -115,6 +115,9 @@
-   if (! fp)
-     return NULL; /* fall through to other methods */
+   size_t len = 0;
+   char *ret = NULL;
  
 +  if (relroot)
 +    *relroot = NULL;
 +
-   while (getline (&buf, &len, fp) > 0)
-     {
-       int mnt_id, parent_mnt_id;
+   fp = fopen ("/proc/self/mountinfo", "r");
+   if (! fp)
+     return NULL; /* fall through to other methods */
 @@ -131,9 +134,6 @@
  		  &count) < 6)
  	continue;