From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B70AC134CC8; Fri, 16 Feb 2024 15:38:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708097915; cv=none; b=tL0C8jfuJiW2srib7zNvY6VtEP+wNLst8ajpQ2UqStw+AgZPM4pfapW2zueiNnPRMX7bdi9Nb1A8aRrkVF+ur/iRRm/xe0Yg93bk7fcg62ayt3Jrb1KhJ3ccBtBwKJFX0ZRCaoBwo/9Oopkp5B1IJT7txu1iDZkyzM8z8uKl3Xg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708097915; c=relaxed/simple; bh=bVKMokvUVHH0ObAvaZP4W6+bwagIC69WeJsmMPf1YHA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=mcQ8ZPJ8RUkCDt3bqlAaR8eHw9vG8++ZigGpNGHYDemtJKgXcu7niEc2KOUnbJx+2nXT4WOzgfx9ML63ROXRLS7XWBc/PcKvmZEEkRQGTPIr0KQXy6qKgKHbOEZU7VXxlrlO0AGB7wb4mD5qj44kGNVoZQsvccqrft2GITUdqiM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=N29fMtxq; arc=none smtp.client-ip=192.198.163.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="N29fMtxq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708097914; x=1739633914; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=bVKMokvUVHH0ObAvaZP4W6+bwagIC69WeJsmMPf1YHA=; b=N29fMtxqmROTY+PI5ZzrRZoe+FfCEVe5O+nwAZKyTE7Ja2trr0RFLOFQ cAR/qFOGnzJ2u08AfnijLg2hTAXxAD5JECrTMlfsLWJKi3AEl7/Zn1RMe EGmYfUZgCnz7vErNVX8o06mqaU0naQ9D/YDff1VA96FjRYbt+8e96/xw8 v/+wkay8ce7r73kaIbyCUeDSUsUuPxZmsidEKlUBLoFabhjBJTWCbQnhz zNwUUWjlZs5iEnKNUr76c6UuRjiNA++GDa0p8Z7vGsE52l6EiCFaUSlm7 sovdUCgGeRAXTvz+eyXeMnV8vvrKDEFy6eDMXJq2XP8ffgLrEQrG8wNcF w==; X-IronPort-AV: E=McAfee;i="6600,9927,10986"; a="2379802" X-IronPort-AV: E=Sophos;i="6.06,165,1705392000"; d="scan'208";a="2379802" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2024 07:38:33 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,165,1705392000"; d="scan'208";a="8467723" Received: from vbchikar-mobl1.amr.corp.intel.com (HELO [10.209.63.169]) ([10.209.63.169]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Feb 2024 07:38:31 -0800 Message-ID: Date: Fri, 16 Feb 2024 07:38:30 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC 0/8] PGP key parser using SandBox Mode Content-Language: en-US To: Petr Tesarik Cc: =?UTF-8?B?UGV0ciBUZXNhxZnDrWs=?= , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "H. Peter Anvin" , Andy Lutomirski , Oleg Nesterov , Peter Zijlstra , Xin Li , Arnd Bergmann , Andrew Morton , Rick Edgecombe , Kees Cook , "Masami Hiramatsu (Google)" , Pengfei Xu , Josh Poimboeuf , Ze Gao , "Kirill A. Shutemov" , Kai Huang , David Woodhouse , Brian Gerst , Jason Gunthorpe , Joerg Roedel , "Mike Rapoport (IBM)" , Tina Zhang , Jacob Pan , "open list:DOCUMENTATION" , open list , Roberto Sassu , David Howells , Petr Tesarik References: <20240216152435.1575-1-petrtesarik@huaweicloud.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzUVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT7CwXgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lczsFNBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABwsFfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y In-Reply-To: <20240216152435.1575-1-petrtesarik@huaweicloud.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/16/24 07:24, Petr Tesarik wrote: > While I started working on my development branch to illustrate how > SandBox Mode could be enhanced to allow dynamic memory allocation and > other features necessary to convert some existing code, my colleague > Roberto Sassu set out and adapted a PGP key parser to run in a sandbox. > > Disclaimer: > > The code had to be rearranged in order to avoid memory allocations > and crypto operations in the sandbox. The code might contain errors. I'm confused by this. The kernel doesn't (appear to) have a PGP parser today. So are you saying that it *should* have one and it's only feasible if its confined in a sandbox? A much more powerful example would be to take something that the kernel has already and put it in a sandbox. That would show us how difficult it is to sandbox something versus just doing it _normally_ in the kernel. As it stands, I fear this was just the largest chunk of sandbox code that was laying around and it seemed like a good idea to just chuck ~1400 lines of code over the wall at a huge cc list. I'm not sure I want to see any more SandBox mode filling up my inbox.