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 5815EC7619A for ; Sat, 8 Apr 2023 03:42:34 +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:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XfZy/tKch9HGuY3hOHlVdBXf+KzxolCiDzGBp2ZLm6o=; b=tCypT1FY7OXa4d XA7AGOwDktbuHEIBXdt2Y/AtLm3nvv/GZ+KddiFHL9TaGb2J7XFswcDt/T0jf7Bw3dlKLhqnpNf6b EYL8qiGQaHfuer87sYeZ8YJPQd4rbZ9CHvFj/kCdsoEM6uTreDYybn/wHt7WYrlo+Or0DMZTrT4e+ 90aZl8HdMJuL1uWFQBYyeSGHGq/IVnpnnFFqtdn3ggJ6b9ZU+i/Pfli+etseA3GEH/Qer9qGiv1we I5DvmChnbLu5kT2idLMBi62z87c7EZMjK79NkFhhLM1zA79Bc89QjLjYaaOFh5YjktCZnfDMjq65K uJJp5th6qee3BCid8VxA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pkzSU-00Bf7Y-1v; Sat, 08 Apr 2023 03:41:46 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pkzSS-00Bf6l-1O for linux-arm-kernel@lists.infradead.org; Sat, 08 Apr 2023 03:41:45 +0000 Received: from [192.168.254.32] (unknown [47.189.246.67]) by linux.microsoft.com (Postfix) with ESMTPSA id 221E1213B635; Fri, 7 Apr 2023 20:41:41 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 221E1213B635 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1680925302; bh=GDCnssCJSi5ZzpxOgDYvEE6c5OxHsAcZTC6GaGuaaYQ=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CXtTBbcdVZ7cuMqkv2b0z/mNgLenvkvqfYv/FCyJJhgPx67ncX81u9QDD+j5i94bs p77doHIbx4kyN3r8SHmch0iEbMgEJe3tV8u3udHOeV5ywjjc2otw5A6TqeQot1OWXj rvj8d4IOgMUTd+j0NshfTRtzIutdikxcKbx4MMXY= Message-ID: <26149caf-af5f-01b0-1356-09dcf7c74cf0@linux.microsoft.com> Date: Fri, 7 Apr 2023 22:41:40 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: [RFC PATCH v3 00/22] arm64: livepatch: Use ORC for dynamic frame pointer validation Content-Language: en-US To: Dylan Hatch , misono.tomohiro@fujitsu.com Cc: broonie@kernel.org, catalin.marinas@arm.com, chenzhongjin@huawei.com, jamorris@linux.microsoft.com, jpoimboe@redhat.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, mark.rutland@arm.com, nobuta.keiya@fujitsu.com, peterz@infradead.org, pmladek@suse.com, sjitindarsingh@gmail.com, will@kernel.org References: From: "Madhavan T. Venkataraman" In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230407_204144_493806_8BEC89C0 X-CRM114-Status: GOOD ( 10.29 ) 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 Sorry for the delay. Someone else also pointed out the same thing. I just have not had the chance to look at this. I plan to soon. Thanks. Madhavan On 4/3/23 17:26, Dylan Hatch wrote: >> Then, I noticed that invoke_syscall generates instructions to add random offset >> in sp when RANDOMIZE_KSTACK_OFFSET=y, which is true in the above case. > > I'm also seeing this behavior when compiling with > RANDOMIZE_KSTACK_OFFSET=y. I wonder if a special hint type > could/should be added to allow for skipping the reliability check for > stack frames with this randomized offset? Forgive me if this is a > naive suggestion. > > Thanks, > Dylan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel