From 0847902ab99065a48f9bd3729b6e676288dfd69e Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 7 Aug 2019 21:35:28 -0400
Subject: [PATCH] in clock_getres, check for null pointer before storing result

POSIX allows a null pointer, in which case the function only checks
the validity of the clock id argument.
---
 src/time/clock_getres.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/time/clock_getres.c b/src/time/clock_getres.c
index f0f41cf9..81c67037 100644
--- a/src/time/clock_getres.c
+++ b/src/time/clock_getres.c
@@ -8,7 +8,7 @@ int clock_getres(clockid_t clk, struct timespec *ts)
 	if (SYS_clock_getres != SYS_clock_getres_time64) {
 		long ts32[2];
 		int r = __syscall(SYS_clock_getres, clk, ts32);
-		if (!r) {
+		if (!r && ts) {
 			ts->tv_sec = ts32[0];
 			ts->tv_nsec = ts32[1];
 		}
-- 
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