selinux: log about VM being executable by default

In case virtual memory is being marked as executable by default, SELinux
checks regarding explicit potential dangerous use are disabled.

Inform the user about it.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/hooks.c

@@ -7265,6 +7265,8 @@ static __init int selinux_init(void)
 	cred_init_security();
 
 	default_noexec = !(VM_DATA_DEFAULT_FLAGS & VM_EXEC);
+	if (!default_noexec)
+		pr_notice("SELinux:  virtual memory is executable by default\n");
 
 	avc_init();