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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5E1BEEE57DF for ; Mon, 11 Sep 2023 11:21:39 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C17AA6B0277; Mon, 11 Sep 2023 07:21:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BC7296B0278; Mon, 11 Sep 2023 07:21:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ADD756B0279; Mon, 11 Sep 2023 07:21:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 9D29C6B0277 for ; Mon, 11 Sep 2023 07:21:38 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 6CF47409B8 for ; Mon, 11 Sep 2023 11:21:38 +0000 (UTC) X-FDA: 81224076276.20.FA73AD3 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by imf26.hostedemail.com (Postfix) with ESMTP id 739E9140009 for ; Mon, 11 Sep 2023 11:21:34 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=jFC3AD0s; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf26.hostedemail.com: domain of adrian.hunter@intel.com designates 192.55.52.151 as permitted sender) smtp.mailfrom=adrian.hunter@intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1694431295; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=yjXTuHGxB9IU4hIUsC5qgFzrA09/8kym88f7mBGJYx8=; b=7EQMjLkOiuBkZpZDEalRP0mQ60eksH045tV5GxL/6hSWnPLns+ejfjcScEQNN8f8hsDJ8N IlCX5yj0Zy+HmcjJ2MZEvlXRiYn1ZzexDL8IKvdgtKrordSeSo+nkplXvSPA5nH7WlnhdU Nem2SEnji0hAjwln1WtsXXD7YwnR9Es= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=jFC3AD0s; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf26.hostedemail.com: domain of adrian.hunter@intel.com designates 192.55.52.151 as permitted sender) smtp.mailfrom=adrian.hunter@intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1694431295; a=rsa-sha256; cv=none; b=NWSeJy0iJRPtF0Yz9n6Up+ahWJ2dhQYL4G1NjjdLJerjqRB3XJQdCd1loxM4J6SIJXjqrs ncTiD8jq0ycouZahNxcREQ/NHFFux+OyD61vUBP3SBlA0QyvNLwOp0b4kmuRCeB7wtLQbd 827qLZ6ET1V+6ktbq95z/P7c5qtQoZw= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1694431294; x=1725967294; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=+I5yoxhnq9XTmgsh71v3IPq8MLK5vdTB+aRt5bb4Pkw=; b=jFC3AD0sbm2bLNNd2JMz1tc0w0urCbQx17ZAFHPQDA0mLALyLfMoTOu0 SRFuo2lKdyDiYvqFfJ9d5ZX9wPpAKlrs2XIKwdq8bp8gmkB1RApNvu/4H t8Kk4NSMeFh0klESOfuQjknucbMoxE0eH+fQSU54kqRlj8lt2Zhc0tx/A T1c9i5pKSEVpzsIHLunwVZw5NAmiXV79BOcSrv803SKf1hZEkGjr6q+cI p/oIdqglOCtHgLpA5pZKXMpOf6Qe7SgnPXRGy7KMLC2tBDWSu+yDpn6Q5 UFJLEVLQUFtdRxIRExXTvRbU4w6ltjpGrgGtQIGhHouD6IHHMQoALhKG7 w==; X-IronPort-AV: E=McAfee;i="6600,9927,10829"; a="358358392" X-IronPort-AV: E=Sophos;i="6.02,243,1688454000"; d="scan'208";a="358358392" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2023 04:21:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10829"; a="778356390" X-IronPort-AV: E=Sophos;i="6.02,243,1688454000"; d="scan'208";a="778356390" Received: from ahunter6-mobl1.ger.corp.intel.com (HELO ahunter-VirtualBox.home\044ger.corp.intel.com) ([10.251.216.218]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2023 04:21:25 -0700 From: Adrian Hunter To: "Kirill A. Shutemov" , Borislav Petkov , Andrew Morton , Ard Biesheuvel Cc: Dave Hansen , Vlastimil Babka , Mike Rapoport , Lorenzo Stoakes , Tom Lendacky , Baoquan He , Vivek Goyal , Dave Young , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, linux-efi@vger.kernel.org, kexec@lists.infradead.org Subject: [PATCH V2 0/2] Do not try to access unaccepted memory Date: Mon, 11 Sep 2023 14:21:12 +0300 Message-Id: <20230911112114.91323-1-adrian.hunter@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: ht84onrm47imn7bejn4t7ph8og3n5awp X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 739E9140009 X-HE-Tag: 1694431294-747804 X-HE-Meta: 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 deunyZnn riRBhn8RMcB2s2Jjcl6v7VM4IA/YWnS2vWQKavnuwhSD7Pn5fs4b3uDeC1yO0TobONwFyXXcO4OvXiq/w0j7ZNryzbTOxiNJkgSPUwOsedEZKPCuZnL3kl8MBqOAdNkLfccicouMweRNnaBl6NAJGonmGGLYa/k+3hFepKnDjy7m8uR0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Support for unaccepted memory was added recently, refer commit dcdfdd40fa82 ("mm: Add support for unaccepted memory"), whereby a virtual machine may need to accept memory before it can be used. Plug a few gaps where RAM is exposed without checking if it is unaccepted memory. Changes in V2: efi/unaccepted: Do not let /proc/vmcore try to access unaccepted memory Change patch subject and commit message Use vmcore_cb->.pfn_is_ram() instead of changing vmcore.c proc/kcore: Do not try to access unaccepted memory Change patch subject and commit message Do not open code pfn_is_unaccepted_memory() /dev/mem: Do not map unaccepted memory Patch dropped because it is not required Adrian Hunter (2): efi/unaccepted: Do not let /proc/vmcore try to access unaccepted memory proc/kcore: Do not try to access unaccepted memory drivers/firmware/efi/unaccepted_memory.c | 20 ++++++++++++++++++++ fs/proc/kcore.c | 3 ++- include/linux/mm.h | 7 +++++++ 3 files changed, 29 insertions(+), 1 deletion(-) Regards Adrian