1 files changed, 3 insertions, 0 deletions
diff --git a/hurd/hurd-raise.c b/hurd/hurd-raise.c
index d53fd417d2..af464377b6 100644
--- a/hurd/hurd-raise.c
+++ b/hurd/hurd-raise.c
@@ -28,6 +28,9 @@ int
 _hurd_raise_signal (struct hurd_sigstate *ss,
 		    int signo, const struct hurd_signal_detail *detail)
 {
+  if (signo <= 0 || signo >= NSIG)
+    return EINVAL;
+
   if (ss == NULL)
     {
       ss = _hurd_self_sigstate ();