[PATCH 2/4] diskfs: Don't deallocate if dotdot is null in fsys-getroot.c

[Damien Zammit]

---
 libdiskfs/fsys-getroot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libdiskfs/fsys-getroot.c b/libdiskfs/fsys-getroot.c
index 735f359a..2c0d15dd 100644
--- a/libdiskfs/fsys-getroot.c
+++ b/libdiskfs/fsys-getroot.c
@@ -194,7 +194,8 @@ diskfs_S_fsys_getroot (struct diskfs_control *pt,
 
   if (! err)
     {
-      mach_port_deallocate (mach_task_self (), dotdot);
+      if (dotdot != MACH_PORT_NULL)
+        mach_port_deallocate (mach_task_self (), dotdot);
       *retry = FS_RETRY_NORMAL;
       *retryname = '\0';
       *returned_port = ports_get_right (newpi);
-- 
2.25.1