tal: bounds checking fixes.

First, we need to update the bounds for the group property allocated
with the children property, just in case it's at the end of the
allocations.

Second, we need to allow the tal_check() code to accept the pointer to
the null parent's group property.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/ccan/tal/tal.c b/ccan/tal/tal.c
index 612c67bb833f65de486a3c0d534487efc761d85e..32cfd0433a395982e4158851bd10c7d73b5c8682 100644 (file)
--- a/ccan/tal/tal.c
+++ b/ccan/tal/tal.c
@@ -294,6 +294,7 @@ static struct children *add_child_property(struct tal_hdr *parent,
 
                init_group_property(&prop->group, prop, child);
                list_head_init(&prop->group.list);
+               update_bounds(&prop->group);
        }
        return prop;
 }
@@ -887,7 +888,8 @@ static bool check_node(struct group *group,
                        name = (struct name *)p;
                        break;
                }
-               if (p != &null_parent.c.hdr && !in_bounds(p))
+               if (p != &null_parent.c.hdr && p != &null_parent.c.group.hdr
+                   && !in_bounds(p))
                        return check_err(t, errorstr,
                                         "has bad property pointer");