--- linux-user/signal.c	2005-04-27 09:44:53.534806341 +0300
+++ linux-user/signal.c	2005-04-27 09:42:52.325180111 +0300
@@ -417,6 +417,11 @@
 
     if (sig < 1 || sig > TARGET_NSIG)
         return -EINVAL;
+
+    /* no point doing the stuff as those are not allowed for sigaction */
+    if ((sig == TARGET_SIGKILL) || (sig == TARGET_SIGSTOP))
+        return -EINVAL;
+
     k = &sigact_table[sig - 1];
 #if defined(DEBUG_SIGNAL)
     fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",