From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 31E1B4414; Thu, 16 Jan 2025 19:40:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737056441; cv=none; b=VDbKX+JkXn/397tO98bxynGAigX9WApn1+Ec5pWs8zOJn2fB3VlOZLMlv9gRIopGNpIe3geW6eUvV+2M4+GQ8MfWvzPYSzPWz4NyRxeVRggN4x8R3dkOlCVMmzwOLgueet/4CUu4tNB9WQT5ke7PlaYkyXCH+6ZRcejWSYlfqPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737056441; c=relaxed/simple; bh=okrWJ6ZGx3VQgI670QxFKBYwNPpwrQNlJy8qTomC4nw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FibhWvTCI1oFzgSUDe4PcZhcOewMRYlxXgoHZLzh0D/60iFvPx6qEjOPQrbZ+tHSjaS2NXC8+kgszs6b4trlri7npgv9j0nsPtXB+kOQcW269PILSQYOnfLYQ9HMIpmm5HzyMJCY992q6U5CJ6qLzbLw5U123yBgcHBisIIR4uI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OaC41c+8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OaC41c+8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B1A47C4CED6; Thu, 16 Jan 2025 19:40:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737056440; bh=okrWJ6ZGx3VQgI670QxFKBYwNPpwrQNlJy8qTomC4nw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OaC41c+8yUkHqXDrCDOBYKqZqVz6XU8ziq+umZmvNdijUrym9LLBD1DoilzZWTqGE BOd8imeZQAlMNHPPftkOxT/rrVTfLLAxKSHpMGZMQwFKeu85np97dzws5sM4tK2CJV X2V3zCRPkwoJr27U7uYXxYDiOYS3qK7QINVPtX9cqTNyZERN4Zaf7BpdnWiHUiO2vp tcKPKJ8Mm5mywWzSuMj+oQIcRbCrRB/TBSqKwGWXYW2tRmzVsyAyQ/4gPbR0d5u0c1 a4HTSyxcot2qYbA7dFlJeR2vYi9AnNJSiv0srvwMNZ/Qe4Pvmibn0iGxI3Q4U2H6jp VZz81rlqbYDIg== Date: Thu, 16 Jan 2025 11:40:37 -0800 From: Kees Cook To: Christoph Hellwig Cc: Lorenzo Stoakes , Jeff Xu , akpm@linux-foundation.org, jannh@google.com, torvalds@linux-foundation.org, adhemerval.zanella@linaro.org, oleg@redhat.com, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, jorgelo@chromium.org, sroettger@google.com, ojeda@kernel.org, adobriyan@gmail.com, anna-maria@linutronix.de, mark.rutland@arm.com, linus.walleij@linaro.org, Jason@zx2c4.com, deller@gmx.de, rdunlap@infradead.org, davem@davemloft.net, peterx@redhat.com, hca@linux.ibm.com, f.fainelli@gmail.com, gerg@kernel.org, dave.hansen@linux.intel.com, mingo@kernel.org, ardb@kernel.org, Liam.Howlett@oracle.com, mhocko@suse.com, 42.hyeyoo@gmail.com, peterz@infradead.org, ardb@google.com, enh@google.com, rientjes@google.com, groeck@chromium.org, mpe@ellerman.id.au, Vlastimil Babka , Andrei Vagin , Dmitry Safonov <0x7f454c46@gmail.com>, Mike Rapoport , Alexander Mikhalitsyn , Benjamin Berg Subject: Re: [PATCH v4 1/1] exec: seal system mappings Message-ID: <202501161137.D76EE5CEC@keescook> References: <20241125202021.3684919-1-jeffxu@google.com> <20241125202021.3684919-2-jeffxu@google.com> <202412171248.409B10D@keescook> <202501061647.6C8F34CB1A@keescook> <5cf1601b-70c3-45bb-81ef-416d89c415c2@lucifer.local> <202501151538.3E757401@keescook> <20250116052655.GA23894@lst.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250116052655.GA23894@lst.de> On Thu, Jan 16, 2025 at 06:26:55AM +0100, Christoph Hellwig wrote: > On Wed, Jan 15, 2025 at 03:52:23PM -0800, Kees Cook wrote: > > > You seem to be saying you're pushing an internal feature on upstream and > > > only care about internal use cases, this is not how upstream works, as > > > Matthew alludes to. > > > > Internal? No. Chrome OS and Android. Linux runs more Android devices > > than everything else in the world combined -- this is not some random > > experiment. > > All of which are tightly controlled by Google and not actually open > to users. Which doesn't say they don't matter, but they matter a > lot less than fetures widely useful to the open not locked down > userbase of classic Linux. I get your point. Though in my proposal it would be available to anyone without CRIU too, which is, for example, defconfig builds (excepting s390 and riscv). -- Kees Cook