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in sbsavetimestamp(), initialize struct timeval to 0 with memset() so that 

the implicit padding is initialized.  this avoids later copying uninitialized
memory out to user space.  detected by KMSAN.
This commit is contained in:
chs 2021-08-03 20:27:08 +00:00
parent 7d586a0b9c
commit 3de28f092d
1 changed files with 3 additions and 2 deletions
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5
sys/kern/uipc_socket.c
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@ -1,4 +1,4 @@
/* $NetBSD: uipc_socket.c,v 1.294 2020/12/11 03:00:09 thorpej Exp $ */
/* $NetBSD: uipc_socket.c,v 1.295 2021/08/03 20:27:08 chs Exp $ */
/*
* Copyright (c) 2002, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@ -71,7 +71,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.294 2020/12/11 03:00:09 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.295 2021/08/03 20:27:08 chs Exp $");
#ifdef _KERNEL_OPT
#include "opt_compat_netbsd.h"
@ -2432,6 +2432,7 @@ sbsavetimestamp(int opt, struct mbuf **mp)
struct timeval tv;
int error;
memset(&tv, 0, sizeof(tv));
microtime(&tv);
MODULE_HOOK_CALL(uipc_socket_50_sbts_hook, (opt, &mp), enosys(), error);