Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754545AbbHXNCz (ORCPT ); Mon, 24 Aug 2015 09:02:55 -0400 Received: from mail-ob0-f173.google.com ([209.85.214.173]:33302 "EHLO mail-ob0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754299AbbHXNCy (ORCPT ); Mon, 24 Aug 2015 09:02:54 -0400 MIME-Version: 1.0 In-Reply-To: <55D497FC.9060506@gmail.com> References: <1431698344-28054-1-git-send-email-a.ryabinin@samsung.com> <1431698344-28054-6-git-send-email-a.ryabinin@samsung.com> <55AE56DB.4040607@samsung.com> <55AFD8D0.9020308@samsung.com> <55D497FC.9060506@gmail.com> Date: Mon, 24 Aug 2015 15:02:53 +0200 Message-ID: Subject: Re: [PATCH v2 5/5] arm64: add KASan support From: Linus Walleij To: Andrey Ryabinin Cc: Andrey Ryabinin , "linux-kernel@vger.kernel.org" , Dmitry Vyukov , Alexander Potapenko , David Keitel , Arnd Bergmann , Andrew Morton , Catalin Marinas , Will Deacon , "linux-arm-kernel@lists.infradead.org" , "linux-mm@kvack.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1514 Lines: 45 On Wed, Aug 19, 2015 at 4:51 PM, Andrey Ryabinin wrote: > On 08/19/2015 03:14 PM, Linus Walleij wrote: >> Integrator/AP (ARMv5): >> >> This one mounted with an ARMv5 ARM926 tile. It boots nicely >> (but takes forever) with KASan and run all test cases (!) just like >> for the other platforms but before reaching userspace this happens: > > THREAD_SIZE hardcoded in act_mm macro. > > This hack should help: > > diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S > index c671f34..b1765f2 100644 > --- a/arch/arm/mm/proc-macros.S > +++ b/arch/arm/mm/proc-macros.S > @@ -32,6 +32,9 @@ > .macro act_mm, rd > bic \rd, sp, #8128 > bic \rd, \rd, #63 > +#ifdef CONFIG_KASAN > + bic \rd, \rd, #8192 > +#endif > ldr \rd, [\rd, #TI_TASK] > ldr \rd, [\rd, #TSK_ACTIVE_MM] > .endm Yes this work, thanks! I now get to userspace. Tested-by: Linus Walleij I have compiled Trinity and running some stress on different boards. The ARMv7 seems to rather die from random nasty stuff from the syscall or OOM rather than any KASan-detected bugs, but I'll keep hammering at it a big. I have some odd patch I'll pass along. Yours, Linus Walleij -- 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/