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Fix uninitialized memory access. Found by KMSAN.

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Reported-by: syzbot+9f2a173d29d66c88f9ac@syzkaller.appspotmail.com
This commit is contained in:
maxv 2020-05-14 18:18:24 +00:00
parent e78dab04ee
commit d9377f8093
1 changed files with 7 additions and 3 deletions
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10
sys/kern/kern_time.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_time.c,v 1.203 2020/01/02 15:42:27 thorpej Exp $ */ /* $NetBSD: kern_time.c,v 1.204 2020/05/14 18:18:24 maxv Exp $ */
/*- /*-
* Copyright (c) 2000, 2004, 2005, 2007, 2008, 2009 The NetBSD Foundation, Inc. * Copyright (c) 2000, 2004, 2005, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@ -61,7 +61,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_time.c,v 1.203 2020/01/02 15:42:27 thorpej Exp $"); __KERNEL_RCSID(0, "$NetBSD: kern_time.c,v 1.204 2020/05/14 18:18:24 maxv Exp $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/resourcevar.h> #include <sys/resourcevar.h>
@ -352,8 +352,12 @@ again:
struct timespec rmtend; struct timespec rmtend;
struct timespec t0; struct timespec t0;
struct timespec *t; struct timespec *t;
int err;
err = clock_gettime1(clock_id, &rmtend);
if (err != 0)
return err;
(void)clock_gettime1(clock_id, &rmtend);
t = (rmt != NULL) ? rmt : &t0; t = (rmt != NULL) ? rmt : &t0;
if (flags & TIMER_ABSTIME) { if (flags & TIMER_ABSTIME) {
timespecsub(rqt, &rmtend, t); timespecsub(rqt, &rmtend, t);