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=-6.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 4D31BC433E5 for ; Tue, 28 Jul 2020 18:53:44 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 1E553207F5 for ; Tue, 28 Jul 2020 18:53:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cUEet9v0"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="N5ASgrJb" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1E553207F5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=k/2rspWha20vBc2i0jl3+DMdTBC8h7lnoQqEDPxG8pc=; b=cUEet9v0rTsRJqvdkAifQUztU 1ykbYrUDXemhpBGA3yiPx3rDb6FYvf8VyfyckjFe/XbRrgDoRRiwnfeSkkznDWh57Q/7ORYe81Ch6 fML48Y1nSPunnKMhhmChgaZxXWHJRZzWpdW7EsZzdL0gpfVyx8UP6Jxg+54LeeJTGYMaeNonuX/1F qcw/YfcaYSFXzAbkyjfgjKM9CtZPh5vnp5N4swk9VlBvr1lKUJLKNq1tz1uhyDYQzffXn9XwYQJ5V AsnmBq3OqAQjKfZexz7PqqKV5Qd+m417mzLOPH1tw9otp45w58eEzLsZyGOXu49kt1tdXp8ayhsMM iw465os5A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k0Uhq-0001u1-SE; Tue, 28 Jul 2020 18:52:06 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k0Uhp-0001t2-5I for linux-arm-kernel@lists.infradead.org; Tue, 28 Jul 2020 18:52:06 +0000 Received: from [192.168.254.32] (unknown [47.187.206.220]) by linux.microsoft.com (Postfix) with ESMTPSA id D9CA720B4908; Tue, 28 Jul 2020 11:52:02 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D9CA720B4908 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1595962323; bh=4VqGIlTMQb0KmRbW1ECdJsuWGdo+ykQfeo4qSABGj8g=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=N5ASgrJbpo8ewcnejqNlOMHW1LlvWw6Pa2UCzET1NHRPpRnwTSki0Dk44+lBNhwyc 0Oczcbp+TB0JMzyxyK22fLDJcHQra90UOmtWziVf9oqC+T8MJc1Dn+vnJuvj0FVugv h+6UG1h/10vIpOjMBqWpPTkZqsk7ZujJKLdE1AKo= Subject: Re: [PATCH v1 0/4] [RFC] Implement Trampoline File Descriptor To: Andy Lutomirski References: <20200728131050.24443-1-madvenka@linux.microsoft.com> From: "Madhavan T. Venkataraman" Message-ID: <59246260-e535-a9f1-d89e-4e953288b977@linux.microsoft.com> Date: Tue, 28 Jul 2020 13:52:01 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200728_145205_426696_B2C7513B X-CRM114-Status: GOOD ( 18.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "kernel-hardening@lists.openwall.com" , "linux-api@vger.kernel.org" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "oleg@redhat.com" , "linux-security-module@vger.kernel.org" , David Laight , "linux-fsdevel@vger.kernel.org" , "linux-integrity@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" 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 CgpPbiA3LzI4LzIwIDEyOjE2IFBNLCBBbmR5IEx1dG9taXJza2kgd3JvdGU6Cj4gT24gVHVlLCBK dWwgMjgsIDIwMjAgYXQgOTozMiBBTSBNYWRoYXZhbiBULiBWZW5rYXRhcmFtYW4KPiA8bWFkdmVu a2FAbGludXgubWljcm9zb2Z0LmNvbT4gd3JvdGU6Cj4+IFRoYW5rcy4gU2VlIGlubGluZS4uCj4+ Cj4+IE9uIDcvMjgvMjAgMTA6MTMgQU0sIERhdmlkIExhaWdodCB3cm90ZToKPj4+IEZyb206ICBt YWR2ZW5rYUBsaW51eC5taWNyb3NvZnQuY29tCj4+Pj4gU2VudDogMjggSnVseSAyMDIwIDE0OjEx Cj4+PiAuLi4KPj4+PiBUaGUga2VybmVsIGNyZWF0ZXMgdGhlIHRyYW1wb2xpbmUgbWFwcGluZyB3 aXRob3V0IGFueSBwZXJtaXNzaW9ucy4gV2hlbgo+Pj4+IHRoZSB0cmFtcG9saW5lIGlzIGV4ZWN1 dGVkIGJ5IHVzZXIgY29kZSwgYSBwYWdlIGZhdWx0IGhhcHBlbnMgYW5kIHRoZQo+Pj4+IGtlcm5l bCBnZXRzIGNvbnRyb2wuIFRoZSBrZXJuZWwgcmVjb2duaXplcyB0aGF0IHRoaXMgaXMgYSB0cmFt cG9saW5lCj4+Pj4gaW52b2NhdGlvbi4gSXQgc2V0cyB1cCB0aGUgdXNlciByZWdpc3RlcnMgYmFz ZWQgb24gdGhlIHNwZWNpZmllZAo+Pj4+IHJlZ2lzdGVyIGNvbnRleHQsIGFuZC9vciBwdXNoZXMg dmFsdWVzIG9uIHRoZSB1c2VyIHN0YWNrIGJhc2VkIG9uIHRoZQo+Pj4+IHNwZWNpZmllZCBzdGFj ayBjb250ZXh0LCBhbmQgc2V0cyB0aGUgdXNlciBQQyB0byB0aGUgcmVxdWVzdGVkIHRhcmdldAo+ Pj4+IFBDLiBXaGVuIHRoZSBrZXJuZWwgcmV0dXJucywgZXhlY3V0aW9uIGNvbnRpbnVlcyBhdCB0 aGUgdGFyZ2V0IFBDLgo+Pj4+IFNvLCB0aGUga2VybmVsIGRvZXMgdGhlIHdvcmsgb2YgdGhlIHRy YW1wb2xpbmUgb24gYmVoYWxmIG9mIHRoZQo+Pj4+IGFwcGxpY2F0aW9uLgo+Pj4gSXNuJ3QgdGhl IHBlcmZvcm1hbmNlIG9mIHRoaXMgZ29pbmcgdG8gYmUgaG9ycmlkPwo+PiBJdCB0YWtlcyBhYm91 dCB0aGUgc2FtZSBhbW91bnQgb2YgdGltZSBhcyBnZXRwaWQoKS4gU28sIGl0IGlzCj4+IG9uZSBx dWljayB0cmlwIGludG8gdGhlIGtlcm5lbC4gSSBleHBlY3QgdGhhdCBhcHBsaWNhdGlvbnMgd2ls bAo+PiB0eXBpY2FsbHkgbm90IGNhcmUgYWJvdXQgdGhpcyBleHRyYSBvdmVyaGVhZCBhcyBsb25n IGFzCj4+IHRoZXkgYXJlIGFibGUgdG8gcnVuLgo+IFdoYXQgZGlkIHlvdSB0ZXN0IHRoaXMgb24/ ICBBIHBhZ2UgZmF1bHQgb24gYW55IG1vZGVybiB4ODZfNjQgc3lzdGVtCj4gaXMgbXVjaCwgbXVj aCwgbXVjaCwgbXVjaCBzbG93ZXIgdGhhbiBhIHN5c2NhbGwuCgpJIHNlbnQgYSByZXNwb25zZSB0 byB0aGlzLiBCdXQgdGhlIG1haWwgd2FzIHJldHVybmVkIHRvIG1lLgpJIGFtIHJlc2VuZGluZy4K CkkgdGVzdGVkIGl0IGluIG9uIGEgS1ZNIGd1ZXN0IHJ1bm5pbmcgVWJ1bnR1LiBTbywgd2hlbiB5 b3Ugc2F5IHRoYXQgYQpwYWdlIGZhdWx0IGlzIG11Y2ggc2xvd2VyLCBkbyB5b3UgbWVhbiBhIHJl Z3VsYXIgcGFnZSBmYXVsdCB0aGF0IGlzIGhhbmRsZWQKdGhyb3VnaCB0aGUgVk0gbGF5ZXI/IEhl cmUgaXMgdGhlIHJlbGV2YW50IGNvZGUgaW4gZG9fdXNlcl9hZGRyX2ZhdWx0KCk6CgrCoMKgwqDC oMKgwqDCoCBpZiAodW5saWtlbHkoYWNjZXNzX2Vycm9yKGh3X2Vycm9yX2NvZGUsIHZtYSkpKSB7 CsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAvKiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoArCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCAqIElmIGl0IGlzIGEg dXNlciBleGVjdXRlIGZhdWx0LCBpdCBjb3VsZCBiZSBhIHRyYW1wb2xpbmUKwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqAgKiBpbnZvY2F0aW9uLgrCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoCAqLwrCoCDCoMKgIMKgwqDCoMKgwqDCoMKgwqDCoMKgIGlmICgoaHdfZXJyb3Jf Y29kZSAmIHRmbGFncykgPT0gdGZsYWdzICYmCsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqAgdHJhbXBmZF9mYXVsdCh2bWEsIHJlZ3MpKSB7CsKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCB1cF9yZWFkKCZtbS0+bW1hcF9zZW0pOwrC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgcmV0dXJuOwrC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCB9CsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgIGJhZF9hcmVhX2FjY2Vzc19lcnJvcihyZWdzLCBod19lcnJvcl9jb2RlLCBhZGRy ZXNzLCB2bWEpOwrCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCByZXR1cm47CsKgwqDC oMKgwqDCoMKgwqAgfQrCoMKgwqDCoMKgwqDCoMKgIC4uLgrCoMKgwqDCoMKgwqDCoMKgIGZhdWx0 ID0gaGFuZGxlX21tX2ZhdWx0KHZtYSwgYWRkcmVzcywgZmxhZ3MpOwoKdHJhbXBmZCBmYXVsdHMg YXJlIGluc3RydWN0aW9uIGZhdWx0cyB0aGF0IGdvIHRocm91Z2ggYSBkaWZmZXJlbnQgY29kZSBw YXRoIHRoYW4KdGhlIG9uZSB0aGF0IGNhbGxzIGhhbmRsZV9tbV9mYXVsdCgpLiBQZXJoYXBzLCBp dCBpcyB0aGUgaGFuZGxlX21tX2ZhdWx0KCkgdGhhdAppcyB0aW1lIGNvbnN1bWluZy4gQ291bGQg eW91IGNsYXJpZnk/CgpUaGFua3MuCgpNYWRoYXZhbgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGlu dXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQu b3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=