Cygwin: pthread_kill: check for invalid signal number

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

diff --git a/winsup/cygwin/thread.cc b/winsup/cygwin/thread.cc
index 7c6a919c0e34cb913687257fa030eb1d6b7456de..fcfd75c791945f1810c0b8349e9e341d19395d33 100644 (file)
--- a/winsup/cygwin/thread.cc
+++ b/winsup/cygwin/thread.cc
@@ -3351,6 +3351,10 @@ pthread_kill (pthread_t thread, int sig)
   if (!pthread::is_good_object (&thread))
     return EINVAL;
 
+  /* check that sig is in right range */
+  if (sig < 0 || sig >= _NSIG)
+      return EINVAL;
+
   siginfo_t si = {0};
   si.si_signo = sig;
   si.si_code = SI_USER;