From patchwork Wed Aug 26 08:26:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 510753 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 885E41401F0 for ; Wed, 26 Aug 2015 18:33:07 +1000 (AEST) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 6C3151A2C89 for ; Wed, 26 Aug 2015 18:33:07 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from e28smtp02.in.ibm.com (e28smtp02.in.ibm.com [122.248.162.2]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 133851A0CBA for ; Wed, 26 Aug 2015 18:26:53 +1000 (AEST) Received: from /spool/local by e28smtp02.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 26 Aug 2015 13:56:50 +0530 Received: from d28dlp01.in.ibm.com (9.184.220.126) by e28smtp02.in.ibm.com (192.168.1.132) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Wed, 26 Aug 2015 13:56:49 +0530 X-Helo: d28dlp01.in.ibm.com X-MailFrom: aneesh.kumar@linux.vnet.ibm.com X-RcptTo: linuxppc-dev@lists.ozlabs.org Received: from d28relay04.in.ibm.com (d28relay04.in.ibm.com [9.184.220.61]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 55CF8E0059 for ; Wed, 26 Aug 2015 13:56:13 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay04.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t7Q8QfEI37552236 for ; Wed, 26 Aug 2015 13:56:43 +0530 Received: from d28av05.in.ibm.com (localhost [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t7Q8Qd6g025185 for ; Wed, 26 Aug 2015 13:56:41 +0530 Received: from skywalker.in.ibm.com ([9.77.192.42]) by d28av05.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t7Q8Qcda025085; Wed, 26 Aug 2015 13:56:39 +0530 From: "Aneesh Kumar K.V" To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, ryabinin.a.a@gmail.com Subject: [PATCH V2 04/10] kasan: Don't use kasan shadow pointer in generic functions Date: Wed, 26 Aug 2015 13:56:12 +0530 Message-Id: <1440577578-15813-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.5.0 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> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15082608-0005-0000-0000-0000072C7543 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, "Aneesh Kumar K.V" MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" We can't use generic functions like print_hex_dump to access kasan shadow region. This require us to setup another kasan shadow region for the address passed (kasan shadow address). Most architecture won't be able to do that. Hence remove dumping kasan shadow region dump. If we really want to do this we will have to have a kasan internal implemen tation of print_hex_dump for which we will disable address sanitizer operation. Signed-off-by: Aneesh Kumar K.V --- mm/kasan/report.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index d19d01823a68..79fbc5d14bd2 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -170,12 +170,6 @@ static void print_shadow_for_address(const void *addr) snprintf(buffer, sizeof(buffer), (i == 0) ? ">%p: " : " %p: ", kaddr); - kasan_disable_current(); - print_hex_dump(KERN_ERR, buffer, - DUMP_PREFIX_NONE, SHADOW_BYTES_PER_ROW, 1, - shadow_row, SHADOW_BYTES_PER_ROW, 0); - kasan_enable_current(); - if (row_is_guilty(shadow_row, shadow)) pr_err("%*c\n", shadow_pointer_offset(shadow_row, shadow),