b=23009 Fix access past end of buffer in fsoptions_to_mdt_flags()

It seems fsoptions_to_mdt_flags() was accessing the "options" buffer past the
end of it due to a missing check for NULL. This should fix it.

i=alex.zhuravlev
i=tappro

diff --git a/lustre/mdt/mdt_handler.c b/lustre/mdt/mdt_handler.c
index a28aaed..bb61110 100644 (file)
--- a/lustre/mdt/mdt_handler.c
+++ b/lustre/mdt/mdt_handler.c
@@ -4450,6 +4450,9 @@ static void fsoptions_to_mdt_flags(struct mdt_device *m, char *options)
                         LCONSOLE_INFO("Disabling ACL\n");
                 }
 
+                if (!*p)
+                        break;
+
                 options = ++p;
         }
 }