From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sat, 15 Jan 2022 14:37:03 +0000 (+0100)
Subject: hurd: Fix timer/clock_getres crash on NULL res parameter
X-Git-Tag: glibc-2.35~82
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67ca1c55603d3e99c26e3edf7955a58b78cfe0ad;p=thirdparty%2Fglibc.git

hurd: Fix timer/clock_getres crash on NULL res parameter

POSIX allows res to be NULL.
---

diff --git a/sysdeps/posix/clock_getres.c b/sysdeps/posix/clock_getres.c
index 252fc9b4edf..b6c3a107915 100644
--- a/sysdeps/posix/clock_getres.c
+++ b/sysdeps/posix/clock_getres.c
@@ -34,8 +34,11 @@ realtime_getres (struct timespec *res)
       /* This implementation assumes that the realtime clock has a
 	 resolution higher than 1 second.  This is the case for any
 	 reasonable implementation.  */
-      res->tv_sec = 0;
-      res->tv_nsec = 1000000000 / clk_tck;
+      if (res)
+	{
+	  res->tv_sec = 0;
+	  res->tv_nsec = 1000000000 / clk_tck;
+	}
       return 0;
     }