From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17E2CC46464 for ; Sat, 11 Aug 2018 02:29:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3D4D223DC for ; Sat, 11 Aug 2018 02:29:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="QWRx+Ltn"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="SgUz8wM6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3D4D223DC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727304AbeHKFCB (ORCPT ); Sat, 11 Aug 2018 01:02:01 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:46508 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726857AbeHKFCB (ORCPT ); Sat, 11 Aug 2018 01:02:01 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 08B9460B84; Sat, 11 Aug 2018 02:29:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1533954572; bh=OYCJxhr4Ld1uMV/Q+pQJnePMWSospGXg73DXb06xA7E=; h=Date:From:To:Cc:Subject:From; b=QWRx+LtnXE3Lm9zrd75mYhP8+bo6oCRlcCVyQO3VcXnJymHaUMJqgXnNx0wbHxa1x kIBdfBYjt4HEM9mLNaVuVslxI+0y3PNMsPZMHOBK2pt0oyh1IZdvRC7/1i+/iN6bi+ P/RM4hagWJpB7uU8cjs2MeBcceMrEaAwblwdPlfM= Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 112CA60B19; Sat, 11 Aug 2018 02:29:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1533954571; bh=OYCJxhr4Ld1uMV/Q+pQJnePMWSospGXg73DXb06xA7E=; h=Date:From:To:Cc:Subject:From; b=SgUz8wM6su+EAD34og4Wuo3uVXrAcE5ZVdeQ+mnsZvaoXl09L515Jvz8b/ti6WV7V /Ja+XFgtnGNETr2m1e75QzWy8aPJoziVpYXmK8KEMCul73OXu7pbB7olrKFiRRkLcv 6/gtUvd2tptnALYpGCuqDN7EoMf+60Kz3zYggxv8= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 10 Aug 2018 19:29:30 -0700 From: Sodagudi Prasad To: catalin.marinas@arm.com, will.deacon@arm.com, mark.rutland@arm.com, andreyknvl@google.com, keescook@chromium.org, akpm@linux-foundation.org, gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, psodagud@codeaurora.org Subject: KASAN errors from unwind_frame Message-ID: X-Sender: psodagud@codeaurora.org User-Agent: Roundcube Webmail/1.2.5 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi All, I have observed following KASAN error with 4.14.56 kernel. Can you please copy change-[1](kasan: add no_sanitize attribute for clang builds) into stable kernels? [1] - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/compiler-clang.h?h=v4.18-rc8&id=12c8f25a016dff69ee284aa3338bebfd2cfcba33 ================================================================== BUG: KASAN: out-of-bounds in __read_once_size_nocheck include/linux/compiler.h:196 [inline] BUG: KASAN: out-of-bounds in unwind_frame+0xc4/0x324 arch/arm64/kernel/stacktrace.c:56 Read of size 8 at addr ffffffe3123ff4b0 by task poc/15233 CPU: 7 PID: 15233 Comm: poc Tainted: G S W O 4.14.56+ #3 Hardware name: Qualcomm Technologies, Inc. Call trace: dump_backtrace+0x0/0x388 show_stack+0x24/0x30 __dump_stack+0x24/0x2c dump_stack+0x8c/0xd0 print_address_description+0x74/0x234 kasan_report+0x240/0x264 __asan_report_load8_noabort+0x2c/0x38 unwind_frame+0xc4/0x324 walk_stackframe+0x44/0x6c __save_stack_trace+0x250/0x444 save_stack_trace_tsk+0x2c/0x38 proc_pid_stack+0x134/0x268 proc_single_show+0xdc/0x130 traverse+0x244/0x5b0 seq_lseek+0x10c/0x27c vfs_llseek+0xb4/0xe4 SyS_lseek+0x54/0xa0 el0_svc_naked+0x34/0x38 The buggy address belongs to the page: page:ffffffbf8c48ffc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x0() raw: 0000000000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 dead000000000200 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not active (free page?) Memory state around the buggy address: ffffffe3123ff380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffe3123ff400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffffffe3123ff480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffffe3123ff500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffe3123ff580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== -Thanks, Prasad -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, Linux Foundation Collaborative Project