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 0F833C43334 for ; Wed, 15 Jun 2022 20:47:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244419AbiFOUrt (ORCPT ); Wed, 15 Jun 2022 16:47:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231149AbiFOUrr (ORCPT ); Wed, 15 Jun 2022 16:47:47 -0400 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2B1C62F388; Wed, 15 Jun 2022 13:47:47 -0700 (PDT) Received: from [192.168.254.32] (unknown [47.189.24.195]) by linux.microsoft.com (Postfix) with ESMTPSA id 0636620C3255; Wed, 15 Jun 2022 13:47:45 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 0636620C3255 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1655326066; bh=kq3rfAYgIAjSYElrcz5BCfLfMD5IgmsVXY+dDWN3Euk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=gb4ZhG9W9zkV39adYmLvcbIyrNy1smJ7/8L50J0AKRJ//aIbBBfpe/mHMjTaMSvPQ MbuSjiC65lpO60c6/GrtUxtsWMr9IOjILmnRcHJ+nmCVKs6Ak8V9rvyawT+B+krbcC eVlkFJR0j2NNDMUTrfGYxZKIYo2Jr+6FkcxFqsvQ= Message-ID: <4f8b60e2-ba16-a7f2-53ac-ec0a20164dcd@linux.microsoft.com> Date: Wed, 15 Jun 2022 15:47:45 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [RFC PATCH v2 00/20] arm64: livepatch: Use ORC for dynamic frame pointer validation Content-Language: en-US To: "Ivan T. Ivanov" Cc: jpoimboe@redhat.com, peterz@infradead.org, chenzhongjin@huawei.com, mark.rutland@arm.com, broonie@kernel.org, nobuta.keiya@fujitsu.com, sjitindarsingh@gmail.com, catalin.marinas@arm.com, will@kernel.org, jamorris@linux.microsoft.com, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org References: <20220524001637.1707472-1-madvenka@linux.microsoft.com> <20220615121844.34v7cos5kcz2hufk@suse> From: "Madhavan T. Venkataraman" In-Reply-To: <20220615121844.34v7cos5kcz2hufk@suse> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/15/22 07:18, Ivan T. Ivanov wrote: > Hi Madhavan, > > And thank you for your work on this! > >> My github repo for this version is here: >> >> https://github.com/madvenka786/linux/tree/orc_v2 >> >> Please feel free to clone and check it out. And, please let me know if you >> find any issues. >> > > > >> >> TBD >> === >> >> - I need to perform more rigorous testing with different scenarios. This >> is work in progress. Any ideas or suggestions are welcome. >> > > I have run following [1] livepatch tests on kernel build from your repository. > Overall results looks good, but when I run klp_tc_13.shI there is something which > I still can not understand completely. It is because of kaslr. > > [ 36.817617] livepatch: enabling patch 'klp_tc_13_livepatch' > [ 36.819602] branch_imm_common: offset out of range > [ 36.820113] branch_imm_common: offset out of range > [ 36.820643] ------------[ ftrace bug ]------------ > [ 36.821172] ftrace failed to modify > [ 36.821173] [] orig_do_read_active_livepatch_id+0x4/0xa8 [klp_test_support_mod] > [ 36.822465] actual: e4:01:00:94 > [ 36.822821] Updating ftrace call site to call a different ftrace function > [ 36.823537] ftrace record flags: e4000002 > [ 36.823953] (2) R > [ 36.823953] expected tramp: ffffdde96882e224 > [ 36.824619] ------------[ cut here ]------------ > [ 36.825125] WARNING: CPU: 0 PID: 950 at kernel/trace/ftrace.c:2085 ftrace_bug+0x98/0x280 > [ 36.826027] Modules linked in: klp_tc_13_livepatch(OK+) klp_test_support_mod(O) crct10dif_ce > [ 36.826943] CPU: 0 PID: 950 Comm: insmod Tainted: G O K 5.18.0-rc1-00020-g1ffee6fdcfda #39 > [ 36.827987] Hardware name: linux,dummy-virt (DT) > [ 36.828546] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > [ 36.829348] pc : ftrace_bug+0x98/0x280 > [ 36.829790] lr : ftrace_bug+0x228/0x280 > [ 36.830224] sp : ffff8000084038e0 > [ 36.830620] x29: ffff8000084038e0 x28: ffff00000485a920 x27: ffffdde931176804 > [ 36.831419] x26: ffffdde93117d1a0 x25: ffff00000485a900 x24: ffffdde96aea1000 > [ 36.832226] x23: 0000000000000000 x22: 0000000000000001 x21: ffffdde96a124da0 > [ 36.833024] x20: ffff0000045620f0 x19: ffffdde96b54a358 x18: ffffffffffffffff > [ 36.833818] x17: 5b20386178302f34 x16: 78302b64695f6863 x15: ffffdde96a3078f8 > [ 36.834621] x14: 0000000000000000 x13: 3432326532383836 x12: ffffdde96ae9b3d8 > [ 36.835425] x11: 0000000000000001 x10: 0000000000000001 x9 : ffffdde96891305c > [ 36.836221] x8 : c0000000ffffefff x7 : 0000000000017fe8 x6 : ffffdde96ae83398 > [ 36.837023] x5 : 0000000000057fa8 x4 : 0000000000000000 x3 : 00000000ffffefff > [ 36.837836] x2 : e32439832ffb9700 x1 : 0000000000000000 x0 : 0000000000000022 > [ 36.838635] Call trace: > [ 36.838923] ftrace_bug+0x98/0x280 > [ 36.839319] ftrace_replace_code+0xa0/0xb8 > [ 36.839768] ftrace_modify_all_code+0xc0/0x160 > [ 36.840273] arch_ftrace_update_code+0x14/0x20 > [ 36.840780] ftrace_run_update_code+0x24/0x78 > [ 36.841283] ftrace_startup_enable+0x50/0x60 > [ 36.841781] ftrace_startup+0xb4/0x178 > [ 36.842214] register_ftrace_function+0x68/0x88 > [ 36.842738] klp_patch_object+0x1c8/0x330 > [ 36.843196] klp_enable_patch+0x468/0x828 > > > Regards, > Ivan > > [1] https://github.com/lpechacek/qa_test_klp > For this to work on aarch64 you will need fixes from PR#13 Thank you so much for taking the time to try it out! I saw Mark's reply to this. Appreciate it! Madhavan 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 9E7DFC43334 for ; Wed, 15 Jun 2022 20:48:59 +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=BzQNjxpc1iCZNqCL6A1EQgc60YO8yTaUqu2Ak4Z8REU=; b=xz9IgZuaSZsNcP G+QUkr0QaUOJuzsVjKtsJxLN74Msb3OW8aYTwGcBmFeg8841GHWRkajjuALZiCmCi0iWUn0B7QM8u Vo1SI9aVLC+uWWpLK5+dYDGnN5lRyNpGdVg4I8sbaxotdHEL0IW7gfU02MVFF+ua1KlND0gcUcDP/ Qw93rNmqND5z2zCn5I8919vlOs0IIchkb3KvmV/thzJ4ZGypETNCxZPoqrYUiyvb3IFHkBDyMb9Yz fvPDIh0m5N/753/UBOsm1yxNlGjL8i3Nw8LG0P/p1nyBuDoCM0lf+eM6XcfD+Y+SkKpF4dNUNKMLP ybO4moPyg0tC9dduFrKQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o1Zve-00GJHL-40; Wed, 15 Jun 2022 20:47:54 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o1Zva-00GJES-O5 for linux-arm-kernel@lists.infradead.org; Wed, 15 Jun 2022 20:47:52 +0000 Received: from [192.168.254.32] (unknown [47.189.24.195]) by linux.microsoft.com (Postfix) with ESMTPSA id 0636620C3255; Wed, 15 Jun 2022 13:47:45 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 0636620C3255 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1655326066; bh=kq3rfAYgIAjSYElrcz5BCfLfMD5IgmsVXY+dDWN3Euk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=gb4ZhG9W9zkV39adYmLvcbIyrNy1smJ7/8L50J0AKRJ//aIbBBfpe/mHMjTaMSvPQ MbuSjiC65lpO60c6/GrtUxtsWMr9IOjILmnRcHJ+nmCVKs6Ak8V9rvyawT+B+krbcC eVlkFJR0j2NNDMUTrfGYxZKIYo2Jr+6FkcxFqsvQ= Message-ID: <4f8b60e2-ba16-a7f2-53ac-ec0a20164dcd@linux.microsoft.com> Date: Wed, 15 Jun 2022 15:47:45 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [RFC PATCH v2 00/20] arm64: livepatch: Use ORC for dynamic frame pointer validation Content-Language: en-US To: "Ivan T. Ivanov" Cc: jpoimboe@redhat.com, peterz@infradead.org, chenzhongjin@huawei.com, mark.rutland@arm.com, broonie@kernel.org, nobuta.keiya@fujitsu.com, sjitindarsingh@gmail.com, catalin.marinas@arm.com, will@kernel.org, jamorris@linux.microsoft.com, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org References: <20220524001637.1707472-1-madvenka@linux.microsoft.com> <20220615121844.34v7cos5kcz2hufk@suse> From: "Madhavan T. Venkataraman" In-Reply-To: <20220615121844.34v7cos5kcz2hufk@suse> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220615_134750_894542_B9DC8768 X-CRM114-Status: GOOD ( 16.10 ) 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 On 6/15/22 07:18, Ivan T. Ivanov wrote: > Hi Madhavan, > > And thank you for your work on this! > >> My github repo for this version is here: >> >> https://github.com/madvenka786/linux/tree/orc_v2 >> >> Please feel free to clone and check it out. And, please let me know if you >> find any issues. >> > > > >> >> TBD >> === >> >> - I need to perform more rigorous testing with different scenarios. This >> is work in progress. Any ideas or suggestions are welcome. >> > > I have run following [1] livepatch tests on kernel build from your repository. > Overall results looks good, but when I run klp_tc_13.shI there is something which > I still can not understand completely. It is because of kaslr. > > [ 36.817617] livepatch: enabling patch 'klp_tc_13_livepatch' > [ 36.819602] branch_imm_common: offset out of range > [ 36.820113] branch_imm_common: offset out of range > [ 36.820643] ------------[ ftrace bug ]------------ > [ 36.821172] ftrace failed to modify > [ 36.821173] [] orig_do_read_active_livepatch_id+0x4/0xa8 [klp_test_support_mod] > [ 36.822465] actual: e4:01:00:94 > [ 36.822821] Updating ftrace call site to call a different ftrace function > [ 36.823537] ftrace record flags: e4000002 > [ 36.823953] (2) R > [ 36.823953] expected tramp: ffffdde96882e224 > [ 36.824619] ------------[ cut here ]------------ > [ 36.825125] WARNING: CPU: 0 PID: 950 at kernel/trace/ftrace.c:2085 ftrace_bug+0x98/0x280 > [ 36.826027] Modules linked in: klp_tc_13_livepatch(OK+) klp_test_support_mod(O) crct10dif_ce > [ 36.826943] CPU: 0 PID: 950 Comm: insmod Tainted: G O K 5.18.0-rc1-00020-g1ffee6fdcfda #39 > [ 36.827987] Hardware name: linux,dummy-virt (DT) > [ 36.828546] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > [ 36.829348] pc : ftrace_bug+0x98/0x280 > [ 36.829790] lr : ftrace_bug+0x228/0x280 > [ 36.830224] sp : ffff8000084038e0 > [ 36.830620] x29: ffff8000084038e0 x28: ffff00000485a920 x27: ffffdde931176804 > [ 36.831419] x26: ffffdde93117d1a0 x25: ffff00000485a900 x24: ffffdde96aea1000 > [ 36.832226] x23: 0000000000000000 x22: 0000000000000001 x21: ffffdde96a124da0 > [ 36.833024] x20: ffff0000045620f0 x19: ffffdde96b54a358 x18: ffffffffffffffff > [ 36.833818] x17: 5b20386178302f34 x16: 78302b64695f6863 x15: ffffdde96a3078f8 > [ 36.834621] x14: 0000000000000000 x13: 3432326532383836 x12: ffffdde96ae9b3d8 > [ 36.835425] x11: 0000000000000001 x10: 0000000000000001 x9 : ffffdde96891305c > [ 36.836221] x8 : c0000000ffffefff x7 : 0000000000017fe8 x6 : ffffdde96ae83398 > [ 36.837023] x5 : 0000000000057fa8 x4 : 0000000000000000 x3 : 00000000ffffefff > [ 36.837836] x2 : e32439832ffb9700 x1 : 0000000000000000 x0 : 0000000000000022 > [ 36.838635] Call trace: > [ 36.838923] ftrace_bug+0x98/0x280 > [ 36.839319] ftrace_replace_code+0xa0/0xb8 > [ 36.839768] ftrace_modify_all_code+0xc0/0x160 > [ 36.840273] arch_ftrace_update_code+0x14/0x20 > [ 36.840780] ftrace_run_update_code+0x24/0x78 > [ 36.841283] ftrace_startup_enable+0x50/0x60 > [ 36.841781] ftrace_startup+0xb4/0x178 > [ 36.842214] register_ftrace_function+0x68/0x88 > [ 36.842738] klp_patch_object+0x1c8/0x330 > [ 36.843196] klp_enable_patch+0x468/0x828 > > > Regards, > Ivan > > [1] https://github.com/lpechacek/qa_test_klp > For this to work on aarch64 you will need fixes from PR#13 Thank you so much for taking the time to try it out! I saw Mark's reply to this. Appreciate it! Madhavan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel