CVE-2020-25717 winbindd: assert wb_parent_idmap_setup_send/recv() was called before...

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14539

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14556

(cherry picked from commit b8c74b7b46d1c7f6b66e565ee08f8c88d6dc2cc4)

diff --git a/source3/winbindd/winbindd_idmap.c b/source3/winbindd/winbindd_idmap.c
index 487f27fd94dde669c609fadc4944f52da4475aa3..14836e3b8a0090fa2ecdbcdff2b10de0565c8d25 100644 (file)
--- a/source3/winbindd/winbindd_idmap.c
+++ b/source3/winbindd/winbindd_idmap.c
@@ -59,6 +59,11 @@ pid_t idmap_child_pid(void)
 
 struct dcerpc_binding_handle *idmap_child_handle(void)
 {
+       /*
+        * The caller needs to use wb_parent_idmap_setup_send/recv
+        * before talking to the idmap child!
+        */
+       SMB_ASSERT(static_parent_idmap_config.num_doms > 0);
        return static_idmap_child.binding_handle;
 }