Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2400C433EF for ; Wed, 22 Dec 2021 14:01:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245557AbhLVOBS (ORCPT ); Wed, 22 Dec 2021 09:01:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245554AbhLVOBO (ORCPT ); Wed, 22 Dec 2021 09:01:14 -0500 Received: from mail-qk1-x72c.google.com (mail-qk1-x72c.google.com [IPv6:2607:f8b0:4864:20::72c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21C2AC061574 for ; Wed, 22 Dec 2021 06:01:14 -0800 (PST) Received: by mail-qk1-x72c.google.com with SMTP id de30so2402055qkb.0 for ; Wed, 22 Dec 2021 06:01:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:reply-to:references :mime-version:content-disposition:in-reply-to; bh=6rM9meUmwsTLv02DYjATChDUD/xIxIH7rXuAdVzXkVQ=; b=ZK1VUuUyucIpu8u9DV3J65pXa2kY+QyC37UC64055wMMJCbldOjQ/atdnhCk/EoK4U P9+1g9RVGzS2FboZ3pqJbGazUrSKCbN6Jp/xWqvWv++PnAu41/wcsHR5yvH/gTxTGwX7 3SUZVR8y/Y3BnhgoARyv73PUnK005HbIk/R+o7k0tMFpLquVDDXA+BGQC42096XulVtA zctrxaTQcOhC29WH3u/iE7K5+cxQxwt+g6fLehOz6WfRjdw57L2c4sVYxWK7Z2p3I5oQ rWQv1IXC6hDbu0wAIoJDA/J0XRMGDzwEUEoaAPoh/kMPAXobMbVD7czdveai5S3MG5DT v/Gg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :reply-to:references:mime-version:content-disposition:in-reply-to; bh=6rM9meUmwsTLv02DYjATChDUD/xIxIH7rXuAdVzXkVQ=; b=iR27SfDM1aioUBlGRnK5y+8TnY8309LCLzGvfpwEi2TTV00zRddJxR2pS5i/pkYPD2 w2CosPomKEylD/KFTJ65EZnQIeQNpBcjFyBay17kbpgaDF5wNMjmOrty5ziUMANVmAwi L3AcEH2XAI8IuHc5gNgpjn7mHHnz5sNFd4lSmsifI0MWmDyZeXDUS3CZBFcorO7Wf4oN jyIHQmLQJxKTiFOfQv2BCWALMhiftHQjCjubk11WpT4d7KtN0+TNs3a7By3vDJjAfzxa 6yC3BYIyiQf4qqxeiAa2pfVRrqvgzWZ5287cIcowRp4uEwxMFBTCMxlPCX+v7mj8qtlA o6NQ== X-Gm-Message-State: AOAM532WiySP6bWbLQRW6COaaFZ9Xa95XNPZwEgp9ihubeOV0r0wMn8G ZhzC7ezURURBn+heE/GhjQ== X-Google-Smtp-Source: ABdhPJyNCbwMopsKyrWFHxgddpA3Tw2geZc5/MuJZKyKJP2iOzjmlvFcqfFwdPxc9JPqdepGh6mLEw== X-Received: by 2002:a05:620a:103a:: with SMTP id a26mr1955567qkk.785.1640181673021; Wed, 22 Dec 2021 06:01:13 -0800 (PST) Received: from serve.minyard.net (serve.minyard.net. [2001:470:b8f6:1b::1]) by smtp.gmail.com with ESMTPSA id r187sm1759536qke.11.2021.12.22.06.01.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Dec 2021 06:01:12 -0800 (PST) Sender: Corey Minyard Received: from minyard.net (unknown [IPv6:2001:470:b8f6:1b:a994:7eee:8e73:4087]) by serve.minyard.net (Postfix) with ESMTPSA id 77FE1180013; Wed, 22 Dec 2021 14:01:11 +0000 (UTC) Date: Wed, 22 Dec 2021 08:01:10 -0600 From: Corey Minyard To: Jason Wang Cc: openipmi-developer@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: [PATCH] ipmi: ssif: replace strlcpy with strscpy Message-ID: <20211222140110.GU14936@minyard.net> Reply-To: minyard@acm.org References: <20211222032707.1912186-1-wangborong@cdjrlc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211222032707.1912186-1-wangborong@cdjrlc.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 22, 2021 at 11:27:07AM +0800, Jason Wang wrote: > The strlcpy should not be used because it doesn't limit the source > length. So that it will lead some potential bugs. > > But the strscpy doesn't require reading memory from the src string > beyond the specified "count" bytes, and since the return value is > easier to error-check than strlcpy()'s. In addition, the implementation > is robust to the string changing out from underneath it, unlike the > current strlcpy() implementation. > > Thus, replace strlcpy with strscpy. Ok, thanks for the patch. -corey > > Signed-off-by: Jason Wang > --- > drivers/char/ipmi/ipmi_ssif.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c > index 48aab77abebf..ba779f1abb5b 100644 > --- a/drivers/char/ipmi/ipmi_ssif.c > +++ b/drivers/char/ipmi/ipmi_ssif.c > @@ -1354,7 +1354,7 @@ static int ssif_detect(struct i2c_client *client, struct i2c_board_info *info) > if (rv) > rv = -ENODEV; > else > - strlcpy(info->type, DEVICE_NAME, I2C_NAME_SIZE); > + strscpy(info->type, DEVICE_NAME, I2C_NAME_SIZE); > kfree(resp); > return rv; > } > -- > 2.34.1 >