Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756596AbbHZQhO (ORCPT ); Wed, 26 Aug 2015 12:37:14 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:36898 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752794AbbHZQhL (ORCPT ); Wed, 26 Aug 2015 12:37:11 -0400 MIME-Version: 1.0 In-Reply-To: <1440577578-15813-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1440577578-15813-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Date: Wed, 26 Aug 2015 19:37:09 +0300 Message-ID: Subject: Re: [PATCH V2 00/10] KASan ppc64 support From: Andrey Ryabinin To: "Aneesh Kumar K.V" Cc: Benjamin Herrenschmidt , paulus@samba.org, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, LKML 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: 1237 Lines: 28 2015-08-26 11:26 GMT+03:00 Aneesh Kumar K.V : > Hi, > > This patchset implements kernel address sanitizer for ppc64. > Since ppc64 virtual address range is divided into different regions, > we can't have one contigous area for the kasan shadow range. Hence > we don't support the INLINE kasan instrumentation. With Outline > instrumentation, we override the shadow_to_mem and mem_to_shadow > callbacks, so that we map only the kernel linear range (ie, > region with ID 0xc). For region with ID 0xd and 0xf (vmalloc > and vmemmap ) we return the address of the zero page. This > works because kasan doesn't track both vmemmap and vmalloc address. > > Known issues: > * Kasan is not yet enabled for arch/powerpc/kvm > * kexec hang > * outline stack and global support > Is there any problem with globals or you just didn't try it yet? I think it should just work. You need only to add --param asan-globals=0 to KBUILD_CFLAGS_MODULE to disable it for modules. -- 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/