talloc: when we enable NULL tracking, reparent the autofree context

If NULL tracking is enabled after the autofree context is initialised
then autofree ends up separate from the null_context. This means that
talloc_report_full() doesn't report the autofree context. Fix this by
reparenting the autofree context when we create the null_context.

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/talloc/talloc.c b/lib/talloc/talloc.c
index 2709741dfc..478767c955 100644
--- a/lib/talloc/talloc.c
+++ b/lib/talloc/talloc.c
@@ -1468,6 +1468,9 @@ void talloc_enable_null_tracking(void)
 {
 	if (null_context == NULL) {
 		null_context = _talloc_named_const(NULL, 0, "null_context");
+		if (autofree_context != NULL) {
+			talloc_reparent(NULL, null_context, autofree_context);
+		}
 	}
 }