From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=213.95.11.211 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794409927; b=ygjh6lQZPA7A4S6S0vZNk2IRZ6YUc8YoV6wLE789npYEx/IZYfy96im0OFm72/eYUD2L sfqV7IbJ4kwgcC8pO8iqFR59Zc1ilvEGpIVUzpQq9CZdp/lePTzcJ4KLUgs1pKuuQ4jhp uOak3pzrKw/yLa78C9/Yfzlrk6mAtpZxEpvhn3H9TBb5HtOWvDatvpML5XZY0EDzNsQhn c71qRBe0ECt0b7N9p0yDFVKZ+0BfTjCt9GHlxRNa8r4CkyKXC0FNdSDce/1rLRzdknLte 1GRlcDs57XlhyFZLXonze4KxX9Bm3zha3Co259+/nb5l+mebxUmHbP9+eiv3mgdNNLw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794409927; h=DMARC-Filter:Received:Date:From:To:Cc:Subject:Message-ID:References: MIME-Version:Content-Type:Content-Disposition:In-Reply-To:User-Agent; bh=dehBO8Yxo1qlGsyLOmGqdqT0CExk2sS3MX1Vk4oa/6A=; b=NuGHogQd4q2v3+vZmcNAeAGQr5FejBZLLSNjEcBxcnWeJFUoVHNKDbtXCDkqruZYUfi3 mB20s5Ot5x39Cn9lsOieALA5xgcrCudH1ta3J92h1FGcqqmCebE+1NeRAJWyAwk4Boj2I NkflHEjbj0Z6TCiF3LLer7V/W1hDstiQSoK5n5Ud5KfJw32ICEW56ekRQglBm9qNxOmVv rYVJvJvsphYol4Uc4lTVN9VtRdFHmxNLEWyqYIjIEwi6JxpfEcT5Fb6GKfjHnTPZR/SR5 xWvEokxiE5NQWwI9FCaiaIawutJCMfsttpea8puFqg5t1lBFrTcrxKJFfpyhgsjnw+w== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=lst.de; spf=pass smtp.mailfrom=lst.de; arc=none smtp.remote-ip=213.95.11.211 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D7920606A321; Wed, 11 Nov 2026 15:12:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D7920606A321 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lst.de Received: by verein.lst.de (Postfix, from userid 2407) id 52A7668D16; Wed, 11 Nov 2026 16:12:03 +0100 (CET) Date: Wed, 11 Nov 2026 16:12:02 +0100 From: Christoph Hellwig To: Christian Brauner Cc: linux-fsdevel@vger.kernel.org, Jann Horn , Chris Mason , Josef Bacik , Christoph Hellwig , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Alexander Viro , Jan Kara , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, driver-core@lists.linux.dev, linux-mm@kvack.org, bpf@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, apparmor@lists.ubuntu.com, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, fuse-devel@lists.linux.dev, linux-efi@vger.kernel.org, xen-devel@lists.xenproject.org, ocfs2-devel@lists.linux.dev, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-usb@vger.kernel.org, Amir Goldstein , linux-erofs@lists.ozlabs.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH RFC 38/41] fuse: refuse files on pseudo filesystems as passthrough backing files Message-ID: <20261111151202.GA11391@lst.de> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-38-4c998976c6c7@kernel.org> X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261110-work-loop-pseudo-v1-38-4c998976c6c7@kernel.org> User-Agent: Mutt/1.5.17 (2007-11-01) I've seen setups where people use fuse to mediate access to sysfs sysfs in odd ways. No idea if that's still around, but if so, this patch will break it.