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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 95F97C433F5 for ; Wed, 9 Mar 2022 14:08:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=j8yhhvzKO+uHwYYYdZ6833lFUeKG+AQtSwTrgExwpis=; b=UWwtUEkOE6beYT UwPkuwFCSLdd4CZgHoYHv/qxCFIMKKb5kPhhVHDGl9pxcW0gDtBzn4hTnm8GXmYLLP4TJP2DOTO9v WPTL4M8qWFA8SA5weBkOaP2nKl3U2hqLpj7DlUicohnvSP2AZW0lR/xb/bHlZYpGKOqWE8nffPdw2 uBZuAJkVZI49egrgNJQbQVKlIAw45MueX3cUGuJ2iFMd3waA4sY0oVk2KWrzZQKpfPmlYHMvcTNry MGpVtMw33JUBJUcQx20mn664XGxgv0Vw1E+n9BjZgkv6ym6SsfPm/ptacCVeWPNbSAZ/Hy4Wb8lg6 vysL6uZqR7vEosJv9bVA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nRwyM-008tXT-85; Wed, 09 Mar 2022 14:07:26 +0000 Received: from mail-yb1-xb2e.google.com ([2607:f8b0:4864:20::b2e]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nRwyF-008tUb-9q for linux-arm-kernel@lists.infradead.org; Wed, 09 Mar 2022 14:07:23 +0000 Received: by mail-yb1-xb2e.google.com with SMTP id x200so4569726ybe.6 for ; Wed, 09 Mar 2022 06:07:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=5HT2h80lnibZhJBvnGZywx4ZmrOaqIdDqke0BNvZjD8=; b=i0P5AaBhFm+ZgOCecsRLrSBiPusUntyyw8Jgsp7c72mfyQdaEBinejSZfSe5Aiy/d0 EIiUGIagjA7TVUEy+THydeXthBR1/RuBf1lsuCXGhGslyrbiDMkBfYrtl8Bve0QA9sRC HnMaPRvX4o1LUyirLTPfZHj37v11xL6pYf5MWpabx97ZO+3kIUO3dfLJT1MbW6WWDWPs TOFdx/SszAQO65ZeAa/jaOQ9eFfXfASzfMA9LDKQjb2+pUZL9Gcx+TPnLulR0EfhLRdr idCyfJmmTmcRXQ732Lsi3VaUQ0ManV3PmC4lghMtH9Lp+f4ItadekqPxZvid91DeGgvt rBgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=5HT2h80lnibZhJBvnGZywx4ZmrOaqIdDqke0BNvZjD8=; b=zjcxJdGo5crB0Dj/arqcguOraUVwq2EEK1R9f8GT2yIncWF/JbP3eE2kTY/RvOQnpi W3LicpgJu1WWBMDqTmPiCMC1+lhtZiYmQZ6XszGLwdQHXGFiNx5Q0az9qMIYj9BtdmoR VB2QGQtrMP8DfPjAcsHjtGSPtJ7I02avJdCMppT2kNW0D8r68tIrPPEwRc7grR+DhIxj zTBIneNXTcSCn/dfFsQh2aP7BKk5L7JbPTs+pGE7pUJ6UiBTxP6/un6XnGAI+RBd266B 8yXbNrbmoiBL86fs3JTwcWeDl48EDZ/tIVpBFnWaQuaJHBfB902U+Awrr2GP8djxCUi7 Wd6w== X-Gm-Message-State: AOAM53261NBy2G/Pw2aBFSHsi9aGBvqAErz8zV4oezpH7nUhgQ0btrwL KwchoEfCzVhq2VExQWZx15G2sWCDoJEA75LeXldB0H92ymkQoQYp X-Google-Smtp-Source: ABdhPJxUAt2jKYmOxzjRz1AanW9ecIVOygJFBDur3mBMmvMhF4ZpUyB+1V8daMxrIshDfw0fRbKA9Qljv+MCcWgZj3s= X-Received: by 2002:a25:4109:0:b0:628:7778:fb18 with SMTP id o9-20020a254109000000b006287778fb18mr16149936yba.412.1646834837778; Wed, 09 Mar 2022 06:07:17 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Naresh Kamboju Date: Wed, 9 Mar 2022 19:37:06 +0530 Message-ID: Subject: Re: [next] arm: Internal error: Oops: 5 PC is at __read_once_word_nocheck To: Ard Biesheuvel Cc: "Russell King (Oracle)" , open list , Linux-Next Mailing List , Linux ARM , Linus Walleij , Arnd Bergmann , Corentin Labbe , Stephen Rothwell X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220309_060719_394657_ED179C50 X-CRM114-Status: GOOD ( 17.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 9 Mar 2022 at 16:16, Ard Biesheuvel wrote: > > On Wed, 9 Mar 2022 at 11:37, Russell King (Oracle) > wrote: > > > > On Wed, Mar 09, 2022 at 03:18:12PM +0530, Naresh Kamboju wrote: > > > While boting linux next-20220308 on BeagleBoard-X15 and qemu arm the following > > > kernel crash reported which is CONFIG_KASAN enabled build [1] & [2]. > > > > The unwinder is currently broken in linux-next. Please try reverting > > 532319b9c418 ("ARM: unwind: disregard unwind info before stack frame is > > set up") > > > > Yeah. > > This is the same spot Corentin hit before, where the double > dereference of vsp is not guarded by anything like > get_kernel_nofault(). We should probably fix that, but that doesn't > address the underlying issue, of course. > > I'm a bit puzzled, though, that this appears now, and didn't before. > > Naresh, I take it you did not see this occurring on earlier linux-nexts? Yes. Earlier linux-next arm boot failed due to [1], unwind: Index not found > I'll try to reproduce this, and see if I can make sense of it. In the > mean time, please do the revert Russell suggested, and if that doesn't > help, maybe try a bisect? I will try your suggestions and get back to you. - Naresh [1] https://lore.kernel.org/linux-arm-kernel/20220301220536.1302898-1-ardb@kernel.org/T/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel