Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752845AbaKLMbY (ORCPT ); Wed, 12 Nov 2014 07:31:24 -0500 Received: from mail.skyhub.de ([78.46.96.112]:40015 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752799AbaKLMbW (ORCPT ); Wed, 12 Nov 2014 07:31:22 -0500 Date: Wed, 12 Nov 2014 13:31:15 +0100 From: Borislav Petkov To: Henrique de Moraes Holschuh Cc: linux-kernel@vger.kernel.org, H Peter Anvin Subject: Re: [PATCH 7/8] x86, microcode, intel: guard against misaligned microcode data Message-ID: <20141112123115.GC16807@pd.tnic> References: <1410197875-19252-1-git-send-email-hmh@hmh.eng.br> <1410197875-19252-8-git-send-email-hmh@hmh.eng.br> <20141107195905.GE5180@pd.tnic> <20141107225425.GC18128@khazad-dum.debian.net> <20141107234806.GG5180@pd.tnic> <20141108215749.GC32023@khazad-dum.debian.net> <20141111104700.GC31490@pd.tnic> <20141111165731.GA2584@khazad-dum.debian.net> <20141111171357.GK31490@pd.tnic> <20141111195400.GG2584@khazad-dum.debian.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20141111195400.GG2584@khazad-dum.debian.net> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 11, 2014 at 05:54:00PM -0200, Henrique de Moraes Holschuh wrote: > void *intel_ucode_kmalloc(size_t size) > { > void *p = kmalloc(size, GFP_KERNEL); Actually I was thinking of this: void *p = kmalloc(size + 16, GFP_KERNEL); if (!p) return -ENOMEM; if (unlikely((unsigned long)p & 0xf)) p_a = ALIGN(p, 16); You'd need to stash the original *p somewhere for freeing later, of course. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/