Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Wed, 20 Feb 2019 17:14:12 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
Cc: "ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>,
	"will.deacon@....com" <will.deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>,
	"Dock, Deneen T" <deneen.t.dock@...el.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
	"nadav.amit@...il.com" <nadav.amit@...il.com>,
	"linux-security-module@...r.kernel.org" <linux-security-module@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"hpa@...or.com" <hpa@...or.com>,
	"kristen@...ux.intel.com" <kristen@...ux.intel.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"linux_dti@...oud.com" <linux_dti@...oud.com>,
	"luto@...nel.org" <luto@...nel.org>,
	"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH v2 15/20] vmalloc: New flags for safe vfree on special
 perms

On Tue, Feb 19, 2019 at 07:42:53PM +0000, Edgecombe, Rick P wrote:
> So to capture both of those intentions, maybe I'll slightly tweak your
> suggestion to VM_FLUSH_RESET_PERMS?

Yeah, sure, better.

VM_HAS_SPECIAL_PERMS doesn't tell me what those special permissions are
while flush and reset permissions makes a lot more sense, thx.

> I had thought it was easier to read. If its not the case, I'll change it as you
> suggest.

My logic is, the less local vars, the easier to scan the code quickly.

> Ard had expressed interest in having the set_alias_() functions for Arm, and the
> names were chosen to be arch agnostic. He didn't explicitly commit but I was
> under the impression he might create an implementation for ARM and we could
> remove this block.

Yeah, Will has those on his radar too so we should be good here.

Thx.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.