Message-ID: <555BB672.9050607@redhat.com>
Date: Tue, 19 May 2015 18:17:22 -0400
From: Prarit Bhargava <prarit@redhat.com>
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To: Borislav Petkov <bp@alien8.de>
CC: Andy Lutomirski <luto@amacapital.net>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Fenghua Yu <fenghua.yu@intel.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Denys Vlasenko <dvlasenk@redhat.com>, Ingo Molnar <mingo@redhat.com>,
        Brian Gerst <brgerst@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Igor Mammedov <imammedo@redhat.com>,
        the arch/x86 maintainers <x86@kernel.org>
Subject: Re: [PATCH] x86, cpuinfo x86_model_id whitespace cleanup
References: <1432050210-32036-1-git-send-email-prarit@redhat.com> <CAMzpN2iJr7GVWm5peLxHvUc2geAgWVVqQ-q91SFEBy6LSuJZcA@mail.gmail.com> <20150519181334.GM4641@pd.tnic> <CALCETrWeQ3McFeyggvV8p+N76gB1-=gYm9SDS4x5RcPb0r_sEg@mail.gmail.com> <20150519192206.GN4641@pd.tnic> <CALCETrW2YxHeaejGOvpeG2rHwX9sbaw8hQ3xqZ+qRGPtpcuVpQ@mail.gmail.com> <20150519203148.GO4641@pd.tnic>
In-Reply-To: <20150519203148.GO4641@pd.tnic>
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On 05/19/2015 04:31 PM, Borislav Petkov wrote:
> On Tue, May 19, 2015 at 01:16:23PM -0700, Andy Lutomirski wrote:
>> It's not just chunk size; it's the direction.  If the dest starts
>> after the source but overlaps it and you copy forwards, then you can
>> clobber the end of the source before you read it.  memmove is
> 
> Some things should simply be done solely in userspace :-)
> 
>> specifically intended to avoid this.
>>
>> Would it be possible to just use memmove directly?
> 
> Yeah.
> 
> Prarit, care to send a v2?

Yep, I can do that.  It'll have to wait until I get into the office in the
morning so I can retest.

P.

> 
> Thanks.
> 
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