From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794302994; b=Ttnq+ycXA/VVIHWdvSM4NMlB1bnZ3HMCFHqCH2FcuDzFqAJEI1LOveUZi2gzU8DJ7FH8 iZMQuASVDuvuryT7jPbSeM7BMFa6us+bA27NMjDW4St3jFS53AdTmxuffu20t1vU38aVu +7F53W+8VQT2qafctDwvwSiiVE/qBPTpTULnVFdTiZDR5CCWn6gCakgqFkVRVHzWHlqPc h8sdCvqGi31o825heimgJqohJoeQc4uVAIPme65M53u/AvPHoGoCt1GBoVsWCHbzJ3PjR rPx+fy4WfAzCRl2Z3+2el+nH4WUUXb7gJYsNXKktvFlcsoUYc4Q1jK1YNf2KQU7kxcQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794302994; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=7qmt9HQEm/IppW/oVVqTcUeulCdTgyeaOTDvG9gmZ/g=; b=LaYksfEAsP/IY0vKiRJ135hQx+Z6YMtkJJ2Q4HKXRaebPPO3G03LO8kHQ0gKz+7xdEbb /bHpvyEKW3cEjSH+5ZjSrdvUnVRg4tMo2xGWlJgXayRsiPiWBdXRR7igX6iRuWzxYZlMf 2PV7xdCUU8tevoB5FUiqMSMVYCeg/rF1gSHvbmtrpUpxmQtv0pUXyX9fIVLNAQv8GytAm qs8555lWETA7LM71r6epZNPyw10JAVigsBUL7VXR8uG51o44baJ1tls22hanNY3zWxOW4 d8KJRv1lD75fUA3x6kQPpHNEs4otV8oQmjDlEMyymqWchjVkfK6Tx1DhnRvysfp3RMA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=cyfGF26H; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (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 89D12606C66B; Tue, 10 Nov 2026 09:29:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=cyfGF26H Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A2811F0089F; Tue, 10 Nov 2026 09:29:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794302994; bh=7qmt9HQEm/IppW/oVVqTcUeulCdTgyeaOTDvG9gmZ/g=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=cyfGF26HWa/vp/eoTy2gQ2yWEKiWpD42wKeztrzUoEH01zUWdndlOAQ0FnZvaoX/P vPm4YcQjlP0ba+CRReNsMh1C0vMQVrJjj8CspS/oWgImanEyT1Bxoe0eeKJsRkafG1 P/nMjS33Q5KcKUXdwN5H2ST/zcRYsITXeFTmMccC51PsU5pIDjBj4VmLAMsc9iavey p13YO29YhNRjD1l8WF26R8CzNndn/brvAD9q4gEhG+X8ZNRGGaV/bpu/7Ek5oFLGYe fulI7FDu/mkYX/VJWfdbIsjRrweuulddRqQ/bqXhM8uiEUwuODLTBfA9+6YjradyId YxQJd3cjdZEaQ== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 41/41] selftests/filesystems: add backing file tests for pseudo files Reply-To: sashiko-reviews@lists.linux.dev To: "Christian Brauner" Cc: linux-security-module@vger.kernel.org, selinux@vger.kernel.org, linux-s390@vger.kernel.org, linux-usb@vger.kernel.org, "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" , "Christian Borntraeger" , "Mark Fasheh" , "Joel Becker" , "Joseph Qi" In-Reply-To: <20261110-work-loop-pseudo-v1-41-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-41-4c998976c6c7@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 10 Nov 2026 09:29:53 +0000 X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Add tests that files on pseudo filesystems can't be used as storage: >=20 > - a procfs file attached read-only to a loop device > - sysfs files attached read-only and read-write to a loop device > - a sysfs file behind a lower-only overlayfs attached to a loop device > - a sysfs file as the backing file of a usb mass storage gadget LUN > - a sysfs file as the source of a file-backed erofs mount >=20 > And make sure that a memfd and another loop device still work as loop > backing files and that loop refuses a backing file that isn't open for > reading. >=20 > Signed-off-by: Christian Brauner (Amutable) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261110-work-loop-= pseudo-v1-0-4c998976c6c7@kernel.org?part=3D41