From: Corinna Vinschen <corinna@vinschen.de>
Date: Mon, 22 Nov 2021 11:19:02 +0000 (+0100)
Subject: Cygwin: pthread_kill: check for invalid signal number
X-Git-Tag: newlib-snapshot-20211231~54
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=d54d8f173d66;p=newlib-cygwin.git

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 7c6a919c0..fcfd75c79 100644
--- 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;