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=-14.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 1DBA4C4338F for ; Wed, 25 Aug 2021 09:09:21 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E1B44610CD for ; Wed, 25 Aug 2021 09:09:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E1B44610CD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=tZW7YWw9PgJsrg21eOULBAVvCAOQDDAJic2fxxONRTA=; b=ROwR18EX/UQOBA9V3/80xhTn1O ZU5FEpFkGQ0Oad/nwTorN2LgtU2mYy0Xwn/Nbl5vs3D0E4lsSEPK7Gdvj+X5gqtNV3ic1Ciod5bRT S4/nRB7sZ3pbTmeLx8xKomLj7q7tLYmnp52JVN+ZPVYebTRh5V2lbAQW6Z63QCSnzDR1v+tj5Ownf zkPA8ilkR3U8WwamAIq6DGXmTdi6WxrmXOSYvi2eWl/MpqWrKeA2sNZuc9wZdfhEhL3sCOfiCZqgQ UZ0BqG6VArmyIXh4r41qojwdG40eSVqarZLPb3bFN+K4W/kRpm3qtVecJoh6/+hgjKYAQyDAvqXax s4krSwCg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mIosN-0062UM-S8; Wed, 25 Aug 2021 09:07:16 +0000 Received: from mail-lj1-x230.google.com ([2a00:1450:4864:20::230]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mIosA-0062SD-7r for linux-arm-kernel@lists.infradead.org; Wed, 25 Aug 2021 09:07:03 +0000 Received: by mail-lj1-x230.google.com with SMTP id f2so42420365ljn.1 for ; Wed, 25 Aug 2021 02:06:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=f42LdpANvyJSV4TU8US6E5uunyv5dcHF5XOfxo+esWU=; b=ZFyggo+OXvUHRVie4vZgyzkn2k0FO3zVdQItJx5pXp2tYzP/X6xHn5vqvVBevSIbxc R/RYg7hevqQmudPNTA1oxVJfq1NKFhQg+DtDTsypqLY9lr7MkRKWxiWYnciFCIvi3Eg4 loACcE6bwPQczfL1+eL6J0vHLtW+XO4m8BNTqwtSX1daBhQkCT8LYjS7/RtDpOqHnlF9 CvxqPhonvH16MlKKQnbdz7q3kocqRHVSz1tgRxe4/lThrFm7muK0f/x8RXinS6yTpPcP BRyf3+SYNwKZcfcI7S45kIimN1+4AfhgoXCJJOzyAAcdVkDJTjCRjvkuhAGSsEWEw5aU AoNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=f42LdpANvyJSV4TU8US6E5uunyv5dcHF5XOfxo+esWU=; b=RsVu16tOwE6MbnVvZpjmoGyQ0O/wlJkVEiYyQIQ3Br7juPpFXcP+9MArhAj5pjCjgM 7BSzdPB7MhlgEeUznKtBTza3obdhECoQjwfikvlhxCUCLSypToFP7rofPaMMkiYL5YIC EbEDgYBROIdjbjBfisw+snx3z+lyMXLYSM0h6PVdWVTu/3qeMesx9NmjrahJ4VvZeZV9 5emOMUNM58J2pQZ/+d2RZyxCwM3YSXPP82sRFqiRU8cwNPMsAb9bJPh/F3NIEY+NroAK F31Ks1sy2Y/n192bJjzP/94XDjIULAvgau2UR4DtccMFZkhpICnG8fRA0ySavqh1K708 yKzw== X-Gm-Message-State: AOAM5333crouzwbTDpXTsQAVNWlx+76Jzx+Qa7zitUhMI01n37mKO0jB 1+aDFgmMd25uz6vtpf9CnYg= X-Google-Smtp-Source: ABdhPJy5Y4uxlz2QKuCn2OIKNIZykMDXzNqKVP38dFzTIpY1p1tL1yTYy4BZLYW054HR4yulhzsheg== X-Received: by 2002:a05:651c:1121:: with SMTP id e1mr14496231ljo.468.1629882410033; Wed, 25 Aug 2021 02:06:50 -0700 (PDT) Received: from [192.168.2.145] (94-29-17-251.dynamic.spd-mgts.ru. [94.29.17.251]) by smtp.googlemail.com with ESMTPSA id w3sm727213ljm.13.2021.08.25.02.06.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Aug 2021 02:06:49 -0700 (PDT) Subject: Re: [PATCH] ARM: kasan: Fix __get_user_check failure with kasan To: Lexi Shao , linux-arm-kernel@lists.infradead.org Cc: linux@armlinux.org.uk, dvyukov@google.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, linus.walleij@linaro.org, liuwenliang@huawei.com, nixiaoming@huawei.com, qiuxi1@huawei.com, wangkefeng.wang@huawei.com References: <20210825064650.98162-1-shaolexi@huawei.com> From: Dmitry Osipenko Message-ID: <4a80b83f-bc63-a141-c7c8-7e7d9545eb00@gmail.com> Date: Wed, 25 Aug 2021 12:06:48 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210825064650.98162-1-shaolexi@huawei.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210825_020702_360561_BE7095F8 X-CRM114-Status: GOOD ( 25.99 ) 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="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org MjUuMDguMjAyMSAwOTo0NiwgTGV4aSBTaGFvINC/0LjRiNC10YI6Cj4gSW4gbWFjcm8gX19nZXRf dXNlcl9jaGVjayBkZWZpbmVkIGluIGFyY2gvYXJtL2luY2x1ZGUvYXNtL3VhY2Nlc3MuaCwKPiBl cnJvciBjb2RlIGlzIHN0b3JlIGluIHJlZ2lzdGVyIGludCBfX2UocjApLiBXaGVuIGthc2FuIGlz Cj4gZW5hYmxlZCwgYXNzaWduaW5nIHZhbHVlIHRvIGtlcm5lbCBhZGRyZXNzIG1pZ2h0IHRyaWdn ZXIga2FzYW4gY2hlY2ssCj4gd2hpY2ggdW5leHBlY3RlZGx5IG92ZXJ3cml0ZXMgcjAgYW5kIGNh dXNlcyB1bmRlZmluZWQgYmVoYXZpb3Igb24gYXJtCj4ga2FzYW4gaW1hZ2VzLgo+IAo+IE9uZSBl eGFtcGxlIGlzIGZhaWx1cmUgaW4gZG9fZnV0ZXggYW5kIHJlc3VsdHMgaW4gcHJvY2VzcyBzb2Z0 IGxvY2t1cC4KPiBMb2c6Cj4gd2F0Y2hkb2c6IEJVRzogc29mdCBsb2NrdXAgLSBDUFUjMCBzdHVj ayBmb3IgNjI5NDZtcyEgW3JzOm1haW4KPiBROlJlZzoxMTUxXQo+IC4uLgo+IChfX2FzYW5fc3Rv cmU0KSBmcm9tIChmdXRleF93YWl0X3NldHVwKzB4ZjgvMHgyYjQpCj4gKGZ1dGV4X3dhaXRfc2V0 dXApIGZyb20gKGZ1dGV4X3dhaXQrMHgxMzgvMHgzOTQpCj4gKGZ1dGV4X3dhaXQpIGZyb20gKGRv X2Z1dGV4KzB4MTY0LzB4ZTQwKQo+IChkb19mdXRleCkgZnJvbSAoc3lzX2Z1dGV4X3RpbWUzMisw eDE3OC8weDIzMCkKPiAoc3lzX2Z1dGV4X3RpbWUzMikgZnJvbSAocmV0X2Zhc3Rfc3lzY2FsbCsw eDAvMHg1MCkKPiAKPiBUaGUgc29mdCBsb2NrdXAgaGFwcGVucyBpbiBmdW5jdGlvbiBmdXRleF93 YWl0X3NldHVwLiBUaGUgcmVhc29uIGlzCj4gZnVuY3Rpb24gZ2V0X2Z1dGV4X3ZhbHVlX2xvY2tl ZCBhbHdheXMgcmV0dXJuIEVJTlZBTCwgdGh1cyBwYyBqdW1wCj4gYmFjayB0byByZXRyeSBsYWJl bCBhbmQgY2F1c2VzIGxvb3BpbmcuCj4gCj4gVGhlIGFzc2VtYmx5IGNvZGUgb2YgZ2V0X2Z1dGV4 X3ZhbHVlX2xvY2tlZCBpbiBrZXJuZWwvZnV0ZXguYzoKPiAuLi4KPiBjMDFmNmRjODogICAgICAg ZWIwYjAyMGUgICAgICAgIGJsICAgICAgYzA0Yjc2MDggPF9fZ2V0X3VzZXJfND4KPiAvLyAieCA9 ICh0eXBlb2YoKihwKSkpIF9fcjI7IiB0cmlnZ2VycyBrYXNhbiBjaGVjayBhbmQgcjAgaXMgb3Zl cndyaXR0ZW4KPiBjMDFmNmRjYzogICAgICAgZTFhMDAwMDcgICAgICAgIG1vdiAgICAgcjAsIHI3 Cj4gYzAxZjZkZDA6ICAgICAgIGUxYTA1MDAyICAgICAgICBtb3YgICAgIHI1LCByMgo+IGMwMWY2 ZGQ0OiAgICAgICBlYjA0ZjFlNiAgICAgICAgYmwgICAgICBjMDMzMzU3NCA8X19hc2FuX3N0b3Jl ND4KPiBjMDFmNmRkODogICAgICAgZTU4NzUwMDAgICAgICAgIHN0ciAgICAgcjUsIFtyN10KPiAv LyBzYXZlIHJldCB2YWx1ZSBvZiBfX2dldF91c2VyKCpkZXN0LCBmcm9tKSwgd2hpY2ggaXMgZGVz dCBhZGRyZXNzIG5vdwo+IGMwMWY2ZGRjOiAgICAgICBlMWEwNTAwMCAgICAgICAgbW92ICAgICBy NSwgcjAKPiAuLi4KPiAvLyBjaGVja2luZyByZXR1cm4gdmFsdWUgb2YgX19nZXRfdXNlciBmYWls ZWQKPiBjMDFmNmUwMDogICAgICAgZTM1NTAwMDAgICAgICAgIGNtcCAgICAgcjUsICMwCj4gLi4u Cj4gYzAxZjZlMGM6ICAgICAgIDAxYTAwMDA1ICAgICAgICBtb3ZlcSAgIHIwLCByNQo+IC8vIGFz c2lnbiByZXR1cm4gdmFsdWUgdG8gRUlOVkFMCj4gYzAxZjZlMTA6ICAgICAgIDEzZTAwMDBkICAg ICAgICBtdm5uZSAgIHIwLCAjMTMKPiAKPiBSZXR1cm4gdmFsdWUgaXMgdGhlIGRlc3RpbmF0aW9u IGFkZHJlc3Mgb2YgZ2V0X3VzZXIgdGh1cyBjZXJ0YWlubHkKPiBub24temVybywgc28gZ2V0X2Z1 dGV4X3ZhbHVlX2xvY2tlZCBhbHdheXMgcmV0dXJuIEVJTlZBTC4KPiAKPiBGaXggaXQgYnkgdXNp bmcgYSB0bXAgdmFpcmFibGUgdG8gc3RvcmUgdGhlIGVycm9yIGNvZGUgYmVmb3JlIHRoZQo+IGFz c2lnbm1lbnQuIFRoaXMgZml4IGhhcyBubyBlZmZlY3RzIHRvIG5vbi1rYXNhbiBpbWFnZXMgdGhh bmtzIHRvIGNvbXBpbGVyCj4gb3B0aW1pemF0aW9uLiBJdCBvbmx5IGFmZmVjdHMgY2FzZXMgdGhh dCBvdmVyd3JpdGUgcjAgZHVlIHRvIGthc2FuIGNoZWNrLgo+IAo+IFRoaXMgc2hvdWxkIGZpeCBi dWcgZGlzY3Vzc2VkIGluIGxpbms6Cj4gWzFdIGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xpbnV4 LWFybS1rZXJuZWwvMGVmN2MyYTUtNWQ4Yi1jNWUwLTYzZmEtMzE2OTNmZDQ0OTVjQGdtYWlsLmNv bS8KPiAKPiBGaXhlczogNDIxMDE1NzEzYjMwICgiQVJNOiA5MDE3LzI6IEVuYWJsZSBLQVNhbiBm b3IgQVJNIikKPiBTaWduZWQtb2ZmLWJ5OiBMZXhpIFNoYW8gPHNoYW9sZXhpQGh1YXdlaS5jb20+ Cj4gLS0tCj4gIGFyY2gvYXJtL2luY2x1ZGUvYXNtL3VhY2Nlc3MuaCB8IDQgKysrLQo+ICAxIGZp bGUgY2hhbmdlZCwgMyBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gCj4gZGlmZiAtLWdp dCBhL2FyY2gvYXJtL2luY2x1ZGUvYXNtL3VhY2Nlc3MuaCBiL2FyY2gvYXJtL2luY2x1ZGUvYXNt L3VhY2Nlc3MuaAo+IGluZGV4IGExM2Q5MDIwNjQ3Mi4uYTZlYjlhZjc0ODcwIDEwMDY0NAo+IC0t LSBhL2FyY2gvYXJtL2luY2x1ZGUvYXNtL3VhY2Nlc3MuaAo+ICsrKyBiL2FyY2gvYXJtL2luY2x1 ZGUvYXNtL3VhY2Nlc3MuaAo+IEBAIC0yMDAsNiArMjAwLDcgQEAgZXh0ZXJuIGludCBfX2dldF91 c2VyXzY0dF80KHZvaWQgKik7Cj4gIAkJcmVnaXN0ZXIgdW5zaWduZWQgbG9uZyBfX2wgYXNtKCJy MSIpID0gX19saW1pdDsJCVwKPiAgCQlyZWdpc3RlciBpbnQgX19lIGFzbSgicjAiKTsJCQkJXAo+ ICAJCXVuc2lnbmVkIGludCBfX3VhX2ZsYWdzID0gdWFjY2Vzc19zYXZlX2FuZF9lbmFibGUoKTsJ XAo+ICsJCWludCBfX3RtcF9lOwkJCQkJCVwKPiAgCQlzd2l0Y2ggKHNpemVvZigqKF9fcCkpKSB7 CQkJCVwKPiAgCQljYXNlIDE6CQkJCQkJCVwKPiAgCQkJaWYgKHNpemVvZigoeCkpID49IDgpCQkJ CVwKPiBAQCAtMjI3LDkgKzIyOCwxMCBAQCBleHRlcm4gaW50IF9fZ2V0X3VzZXJfNjR0XzQodm9p ZCAqKTsKPiAgCQkJYnJlYWs7CQkJCQkJXAo+ICAJCWRlZmF1bHQ6IF9fZSA9IF9fZ2V0X3VzZXJf YmFkKCk7IGJyZWFrOwkJCVwKPiAgCQl9CQkJCQkJCVwKPiArCQlfX3RtcF9lID0gX19lOwkJCQkJ CVwKPiAgCQl1YWNjZXNzX3Jlc3RvcmUoX191YV9mbGFncyk7CQkJCVwKPiAgCQl4ID0gKHR5cGVv ZigqKHApKSkgX19yMjsJCQkJXAo+IC0JCV9fZTsJCQkJCQkJXAo+ICsJCV9fZSA9IF9fdG1wX2U7 CQkJCQkJXAo+ICAJfSkKPiAgCj4gICNkZWZpbmUgZ2V0X3VzZXIoeCwgcCkJCQkJCQkJXAo+IAoK SSBzdWNjZXNzZnVsbHkgbG9hZGVkIEtERSBQbGFzbWEgd2l0aCB0aGlzIGZpeCwgd2hpY2ggd2Fz IGltcG9zc2libGUKcHJldmlvdXNseS4gVGhhbmsgeW91IQoKSXMgaXQgZ3VhcmFudGVlZCB0aGF0 IHIyIHJlZ2lzdGVyIHdvbid0IGJlIGNsb2JiZXJlZCBhcyB3ZWxsPwoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5n IGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5p bmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=