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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 BA79DC63793 for ; Thu, 22 Jul 2021 15:43:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E53161003 for ; Thu, 22 Jul 2021 15:43:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232588AbhGVPCY (ORCPT ); Thu, 22 Jul 2021 11:02:24 -0400 Received: from mail-out.m-online.net ([212.18.0.9]:48365 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230343AbhGVPCX (ORCPT ); Thu, 22 Jul 2021 11:02:23 -0400 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4GVxYB2TV3z1qy4L; Thu, 22 Jul 2021 17:42:54 +0200 (CEST) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4GVxYB0jbnz1rmYB; Thu, 22 Jul 2021 17:42:54 +0200 (CEST) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id bY5aEtjrg-3r; Thu, 22 Jul 2021 17:42:53 +0200 (CEST) X-Auth-Info: PIjtPIK9afYCsoiZrRCgLg1D74hHiwqDc3Ol8FTCod9odBW8gn7GZlgUh/jJPM+a Received: from igel.home (ppp-46-244-188-81.dynamic.mnet-online.de [46.244.188.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Thu, 22 Jul 2021 17:42:53 +0200 (CEST) Received: by igel.home (Postfix, from userid 1000) id 8D6C92C2659; Thu, 22 Jul 2021 17:42:52 +0200 (CEST) From: Andreas Schwab To: Jisheng Zhang Cc: Atish Patra , Palmer Dabbelt , tongtiangen@huawei.com, Paul Walmsley , Albert Ou , linux-riscv , "linux-kernel@vger.kernel.org List" Subject: Re: [PATCH -next v2] riscv: add VMAP_STACK overflow detection References: <87bl6yrcmd.fsf@igel.home> <20210722213724.1f12a0e7@xhacker> X-Yow: Don't hit me!! I'm in the Twilight Zone!!! Date: Thu, 22 Jul 2021 17:42:52 +0200 In-Reply-To: <20210722213724.1f12a0e7@xhacker> (Jisheng Zhang's message of "Thu, 22 Jul 2021 21:37:24 +0800") Message-ID: <87zguexslf.fsf@igel.home> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Jul 22 2021, Jisheng Zhang wrote: > I think we need to pin the stack before calling get_wchan(), could you please > try below patch? Thanks, this fixes the crash for me. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."