linux-kernel - Re: [PATCH 1/1] initramfs: strcpy destination string overflow

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Date:	Tue, 5 Oct 2010 19:44:49 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Evgeny Kuznetsov <EXT-Eugeny.Kuznetsov@...ia.com>
Cc:	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	phillip@...gher.demon.co.uk, hsweeten@...ionengravers.com,
	hpa@...or.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] initramfs: strcpy destination string overflow

On Tue, Oct 05, 2010 at 12:44:17PM +0400, Evgeny Kuznetsov wrote:
>From: Evgeny Kuznetsov <ext-eugeny.kuznetsov@...ia.com>
>
>Function "strcpy()" is used without check for maximum allowed
>source string length and could cause destination string overflow.
>"strcpy()" is replaced by "strlcpy()" to prevent destination
>string overflow.
>
>Signed-off-by: Evgeny Kuznetsov <EXT-Eugeny.Kuznetsov@...ia.com>


Looks good to me,

Reviewed-by: WANG Cong <xiyou.wangcong@...il.com>

>---
> init/initramfs.c |    2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
>diff --git a/init/initramfs.c b/init/initramfs.c
>index 4b9c202..3e68568 100644
>--- a/init/initramfs.c
>+++ b/init/initramfs.c
>@@ -56,7 +56,7 @@ static char __init *find_link(int major, int minor, int ino,
> 	q->minor = minor;
> 	q->ino = ino;
> 	q->mode = mode;
>-	strcpy(q->name, name);
>+	strlcpy(q->name, name, sizeof(q->name));
> 	q->next = NULL;
> 	*p = q;
> 	return NULL;
>-- 
>1.6.3.3
>
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