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[87.106.108.193]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-482fbb34ae6sm5080266f8f.37.2026.08.28.08.45.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Aug 2026 08:45:39 -0700 (PDT) Date: Fri, 28 Aug 2026 17:45:37 +0200 From: =?iso-8859-1?Q?G=FCnther?= Noack To: =?iso-8859-1?Q?G=FCnther?= Noack Cc: =?iso-8859-1?Q?Micka=EBl_Sala=FCn?= , Christian Brauner , linux-security-module@vger.kernel.org, Paul Moore , Amir Goldstein , Miklos Szeredi , Serge Hallyn , Stephen Smalley , stable@vger.kernel.org Subject: Re: [PATCH v6 2/6] landlock: Require LANDLOCK_ACCESS_FS_MAKE_REG for whiteout creation Message-ID: <20260828.dc270da340a3@gnoack.org> References: <20260813093157.1436894-1-gnoack@google.com> <20260813093157.1436894-3-gnoack@google.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260813093157.1436894-3-gnoack@google.com> On Thu, Aug 13, 2026 at 11:31:53AM +0200, Günther Noack wrote: > diff --git a/include/uapi/linux/landlock.h b/include/uapi/linux/landlock.h > index 7ffe2ef127ee..9c1102ebf06e 100644 > --- a/include/uapi/linux/landlock.h > +++ b/include/uapi/linux/landlock.h > @@ -351,6 +351,7 @@ struct landlock_net_port_attr { > * device. > * - %LANDLOCK_ACCESS_FS_MAKE_DIR: Create (or rename) a directory. > * - %LANDLOCK_ACCESS_FS_MAKE_REG: Create (or rename or link) a regular file. > + * This also guards the creation of whiteout objects as used in OverlayFS. I will send an update to the man page adding this line. Tracking bug for Landlock man page updates: https://github.com/landlock-lsm/linux/issues/66 –Günther