Fix for segfault when reading /proc/mdstat

Some kernel versions don't put a space between 'active' and '(auto-read-only)'
in /proc/mdstat.  This causes a parsing problem leaving 'level' set to
NULL which causes a crash.

So synthesise a space there if it is missing, and check for 'level' to
be NULL and don't de-ref if it is.

1 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index fa4fed4..fdf720d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Changes Prior to this release
+    -   Avoid segfault when parsing /proc/mdstat with auto-read-only
+	arrays.
+
 Changes Prior to 2.6.4 release
     -   Make "--create --auto=mdp" work for non-standard device names.
     -   Fix restarting of a 'reshape' if it was stopped in the middle.