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Ignore errors when copyin/out len == 0.

This commit is contained in:
pooka 2010-07-18 12:44:31 +00:00
parent 3b36d603a4
commit 5397c7b6af
1 changed files with 6 additions and 4 deletions
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10
sys/rump/librump/rumpkern/rumpcopy.c
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@ -1,4 +1,4 @@
/* $NetBSD: rumpcopy.c,v 1.4 2010/07/12 21:00:47 pooka Exp $ */
/* $NetBSD: rumpcopy.c,v 1.5 2010/07/18 12:44:31 pooka Exp $ */
/*
* Copyright (c) 2009 Antti Kantee. All Rights Reserved.
@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rumpcopy.c,v 1.4 2010/07/12 21:00:47 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: rumpcopy.c,v 1.5 2010/07/18 12:44:31 pooka Exp $");
#include <sys/param.h>
#include <sys/lwp.h>
@ -41,8 +41,9 @@ copyin(const void *uaddr, void *kaddr, size_t len)
{
if (curproc->p_vmspace == &vmspace0) {
if (uaddr == NULL)
if (__predict_false(uaddr == NULL && len)) {
return EFAULT;
}
memcpy(kaddr, uaddr, len);
} else {
rump_sysproxy_copyin(uaddr, kaddr, len);
@ -55,8 +56,9 @@ copyout(const void *kaddr, void *uaddr, size_t len)
{
if (curproc->p_vmspace == &vmspace0) {
if (uaddr == NULL)
if (__predict_false(uaddr == NULL && len)) {
return EFAULT;
}
memcpy(uaddr, kaddr, len);
} else {
rump_sysproxy_copyout(kaddr, uaddr, len);