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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79F5FFA3740 for ; Thu, 27 Oct 2022 21:36:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236900AbiJ0Vf6 (ORCPT ); Thu, 27 Oct 2022 17:35:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236852AbiJ0Vft (ORCPT ); Thu, 27 Oct 2022 17:35:49 -0400 Received: from mail-lf1-x136.google.com (mail-lf1-x136.google.com [IPv6:2a00:1450:4864:20::136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2548E664CC for ; Thu, 27 Oct 2022 14:35:45 -0700 (PDT) Received: by mail-lf1-x136.google.com with SMTP id p8so4912968lfu.11 for ; Thu, 27 Oct 2022 14:35:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=DLMSX5xAv8Of0i26zhWYF6rLIZWMK34svw6mTWTkhA0=; b=k76nKuwuAv2/FX6e0asrhgtq+Zaezq8dDXRxUYPw8WXy0lRzqXw4z/udSZSBZDsEOL vNMGvR7jVzQZs6khH+kl+Gm3M8aACk2+j2Yk/CNCpWdIMpDTL/ITB2i2LUjIM/IOmbdE bl0AXFMLe0pldjS1m7pj8IXCry1oLJKX3P8/CbZGGbUr0fihMvuXSG0b9cHQidZ24qBh e+u0BKUFkMJ/pTjL+0RvHEQFQzMpTbZREXQds8rzhufKhspiyGlDef6jEwuG3pwfPIER hc3oZdh5gbGEZhddyIg/EXeLacbfHAtgBU8ngguLXLnfHv601Y6x+54cSblsjYjqNBNg 1iNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DLMSX5xAv8Of0i26zhWYF6rLIZWMK34svw6mTWTkhA0=; b=vXBW4mnfX+3WK37kE56yy10DDLtaekXT8ERJzWY6MRWCrq4N48mnKLXtK1UxF4vH2j rn6STysJTlciM/UDzIBXo+2GWdzJQj6/N2v0KmLQxq0QjjV4C+oQ7E5TfQOOpbuAqNLp X+MkRqr7UB0ZGMvTYA3RnSSwG8ppKhxSzxd9OzUor231GtbSqJIGzY5zJ+raMGLTu5KM kvJJ5j0F18nf5TUvOfuSILmnB3FRZISb8Q/dAvUJBOGOhDjaqjojxm/XjVAaCf1+b1g3 LMMmUlFrJG7i0Jk4CUVMrqH+83hmzFHxgmVUKwUo6Sz+b9IdUZjDcXZY+MAv/DWgarcQ KP3w== X-Gm-Message-State: ACrzQf3IkOM6OLqE1EUJ8EQ/1UWOsRkEJBcjzlosU0nZCwPKEmjOryVI V0DZppyFa/RKJEudf+RF/VY= X-Google-Smtp-Source: AMsMyM6Qs3AoWb6vrKWJ9H8UiVK9vcnmwQDjZpxxZN6/65eM9FeASSG+D+Mg8/KCEPpsrXgl3XJovA== X-Received: by 2002:a05:6512:2983:b0:4a0:5745:f7ca with SMTP id du3-20020a056512298300b004a05745f7camr21096993lfb.116.1666906543496; Thu, 27 Oct 2022 14:35:43 -0700 (PDT) Received: from [192.168.31.203] ([5.19.98.172]) by smtp.gmail.com with ESMTPSA id d3-20020a056512368300b00492ce573726sm318308lfs.47.2022.10.27.14.35.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Oct 2022 14:35:43 -0700 (PDT) Message-ID: <1c3209e7-a184-22f7-096c-874a2f77ce55@gmail.com> Date: Fri, 28 Oct 2022 00:35:44 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [tip:x86/mm] [x86/mm] 1248fb6a82: Kernel_panic-not_syncing:kasan_populate_pmd:Failed_to_allocate_page To: Dave Hansen , Peter Zijlstra , kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, Dave Hansen , Seth Jenkins , Kees Cook , linux-kernel@vger.kernel.org, x86@kernel.org, Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, "Yin, Fengwei" References: <202210241508.2e203c3d-yujie.liu@intel.com> <278cc353-6289-19e8-f7a9-0acd70bc8e11@gmail.com> <864b4fbe-4462-9962-7afd-9140d5165cdb@intel.com> Content-Language: en-US From: Andrey Ryabinin In-Reply-To: <864b4fbe-4462-9962-7afd-9140d5165cdb@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/27/22 18:12, Dave Hansen wrote: > On 10/25/22 08:39, Andrey Ryabinin wrote: >> KASAN tries to allocate shadow memory for the whole cpu entry area. >> The size is CPU_ENTRY_AREA_MAP_SIZE/8 and this is obviously fails after your patch. >> The fix this might be something like this: >> >> --- >> arch/x86/include/asm/kasan.h | 2 ++ >> arch/x86/mm/cpu_entry_area.c | 3 +++ >> arch/x86/mm/kasan_init_64.c | 16 +++++++++++++--- >> 3 files changed, 18 insertions(+), 3 deletions(-) > > Andrey, if you have a minute, could you send this as a real patch, with > a SoB? Done, It slightly different because there was a bug in vaddr->nid calculation.