linux-kernel - Re: [PATCH v2] x86/boot: Rename overlapping memcpy() to memmove()

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Message-ID: <20160428090427.GB5773@gmail.com>
Date:	Thu, 28 Apr 2016 11:04:27 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	Yinghai Lu <yinghai@...nel.org>, Baoquan He <bhe@...hat.com>,
	Borislav Petkov <bp@...e.de>, Ingo Molnar <mingo@...hat.com>,
	"x86@...nel.org" <x86@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrey Ryabinin <aryabinin@...tuozzo.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	"H.J. Lu" <hjl.tools@...il.com>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Andy Lutomirski <luto@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] x86/boot: Rename overlapping memcpy() to memmove()


* Kees Cook <keescook@...omium.org> wrote:

> +void *memcpy(void *dest, const void *src, size_t n)

btw., if there's any doubt about other overlapping uses, we could add this to 
memcpy():

  WARN_ON_ONCE(dest > src && dest-src < n);

or so? Does printk() work so early on?

Thanks,

	Ingo