From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C018E606A8B7 for ; Wed, 11 Nov 2026 15:12:10 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4jPn7F3HrSz308H; Thu, 12 Nov 2026 02:12:09 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=213.95.11.211 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1794409929; cv=none; b=JDKXMPgyPIpzmQXzkpRhrEKOY602xsUCY83C5Lb45yNo4F2VHJ8xwK5jVn3TSsQ/q3G/97ijayifMRlgQ7/O+J8qDmNftvX6F57qCjrclSKpefiRlHWW/Q4vUL6twfBviwAN3ijmC3HWpYLAs2OyEtbHVCN+kfEanWMbur0bmKqJL/yPzzeGvdLYxS84GQYhTER1CF1eFBqT/NWL6I9aG1YBfMH9o5SIFSyDfaihU68gGVKr3V9J1tPyY0+fJSWpqJLCXWiclSb3v6GBnnMxRj9qdOEUv6PVJ/smvZ4yjS+35NkYEudNGVqXLUVuf1P0SNspNtWJKA1rkIPz7pY/lw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1794409929; c=relaxed/relaxed; bh=dehBO8Yxo1qlGsyLOmGqdqT0CExk2sS3MX1Vk4oa/6A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=GSNYqwr5ZPNtddokZXjw+sWz/rrQQY2cOluDK4gG9tm37mO2MhldcXF7v9ILbnRC61g4hxnoCxwY2TBiNR9ke7FkZS69iBVDWfAim8tDZR/VypHciax8/tO1XtvsAFkPjdRKduspX75BKnCqrBtZOfS4K7kWBOnMigLSt1tJqXLpoVYa7GuQKGWbsnXYOdSzNaglg88aa78hdZZndWsWjoXCvo26OoOba5jIWhdiS9uIXVxmkhLRlbJPwtvOTzwIXffohJuSTC5ZLt66Fxr75QfJ+KU4uak5Gnc3IsaJkkpsRrzxROtqdwwomg0vIRkEkLWHnsiJiwnTZkL6BDvCqA== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=lst.de; spf=pass (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=lists.ozlabs.org) smtp.mailfrom=lst.de Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=lst.de Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=lists.ozlabs.org) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4jPn7D3b2Mz2y8p; Thu, 12 Nov 2026 02:12:08 +1100 (AEDT) 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: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , Precedence: list X-Archived-By: 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) X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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.