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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ABE61C433F5 for ; Sun, 3 Oct 2021 05:52:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C55661B1D for ; Sun, 3 Oct 2021 05:52:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229777AbhJCFtl (ORCPT ); Sun, 3 Oct 2021 01:49:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229450AbhJCFti (ORCPT ); Sun, 3 Oct 2021 01:49:38 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9535AC0613EC; Sat, 2 Oct 2021 22:47:51 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id b22so8964728pls.1; Sat, 02 Oct 2021 22:47:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:cc:references:subject:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=savTH8tOINZ2J99oLslSAWNZa5Ho6D9RgvdIZJ7bFnA=; b=Y7uNNINBrkq5cxVztJ3SYWUhJ4cqOz8cuJbfN83wQn95FC/D2R99w+R2PGb9+omyw9 oUMBBOL7Q2qXknqyn+ueCjhRRkGnQvpvwzbs+lH1kJcT7mhA/Sv5L5QSKRg4csmSP3i7 KQf0X+t+NalR3wLVAXSHYb4TC8CIkajx690fgi5nQq7/ONabkjke8DE4NrtX3mbsKCov 6GKUAjmQjbUU46Au+jp8B3bHxUi4dgI9/hNH0sygbvUe0nxcWAjC9QFLyx8xMU0L23zo 3MbZYv6rWeB3f/d/ixsniSvPVzZlDq3h4NGCPXkQIMFaUYbnnngJuLp7T857lqiStDFe WmlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:to:cc:references:subject:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=savTH8tOINZ2J99oLslSAWNZa5Ho6D9RgvdIZJ7bFnA=; b=LAT2rnWjzWef3CqOnK7hceQReCldU++G4ZUr7UgKe22BYQXR2MnvQbBS4HwlYhBZBG mF9UOuTMkqsu+Ge2AQGZ84shRRGpiWtV7IGo19/5l8L7KlDWX8bKxlvNc4w4l1rjyoo2 xfB1qpBVTQUvxEkE4M5BRq2lbM2Prd5LQkuj5vvXph60p+JrQ/Mju3uWFdsmX7qEPPkI 4uibaMx66HRyryxGcmIo6Uz91fuKP2hqHlvqFdrMbYolaA7fWx8Qc/KUb022/YPRtRRp X4nTTJlZ1Ac4tUrEk7OPboTNtJ3cYjDilymVzARRTjXDUB6Pyx/ux3cX8LMm6Vfqrnd+ pqYA== X-Gm-Message-State: AOAM5309FcmgNiS5BQgodW/YqAn/8xYdQU9EIZjSsX8GHFHLJgoNvfbn 7ttJdj8RezkTtyfxE3quv+Y= X-Google-Smtp-Source: ABdhPJy5HRxA5o6Rs+cSxf9+J2Z0L3aQbAXv7HdqnVMMAbnAdw/SICL9EIXJilE004Mcf5mNUIhaVQ== X-Received: by 2002:a17:902:d2c6:b0:13e:9bc9:1ae3 with SMTP id n6-20020a170902d2c600b0013e9bc91ae3mr5601433plc.87.1633240070503; Sat, 02 Oct 2021 22:47:50 -0700 (PDT) Received: from [10.12.152.158] ([154.21.212.155]) by smtp.gmail.com with ESMTPSA id y7sm10286631pfr.33.2021.10.02.22.47.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 02 Oct 2021 22:47:50 -0700 (PDT) To: seanjc@google.com Cc: djwong@kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, stephenackerman16@gmail.com References: Subject: Re: kvm crash in 5.14.1? From: Stephen Message-ID: <85e40141-3c17-1dff-1ed0-b016c5d778b6@gmail.com> Date: Sat, 2 Oct 2021 22:47:48 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I think this should fix the problems? > > diff --git a/include/linux/secretmem.h b/include/linux/secretmem.h > index 21c3771e6a56..988528b5da43 100644 > --- a/include/linux/secretmem.h > +++ b/include/linux/secretmem.h > @@ -23,7 +23,7 @@ static inline bool page_is_secretmem(struct page *page) >         mapping = (struct address_space *) >                 ((unsigned long)page->mapping & ~PAGE_MAPPING_FLAGS); > > -       if (mapping != page->mapping) > +       if (!mapping || mapping != page->mapping) >                 return false; > >         return mapping->a_ops == &secretmem_aops; I have validated that my system was stable after several days on v5.13.19. I'm now booted into a v5.14.8 kernel with this patch, and I'll try to report back if I see a crash; or in roughly a week if the system seems to have stabilized. Thanks,     Stephen