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 3DAF6664D6; Fri, 9 Feb 2024 09:54:19 +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=1707472460; cv=none; b=c6YrVaTLJlrs0ij461ns1nIuM/bG2nffo2b3OgKMmuEzpBsk//VSdbm5CPj/z3YS5pe7ngwL9R1mrE7SnWg1V66HuGpEivB0qT+qIWp2kui3UF3bzD0hF0pLAeh0S7ksBw87Pi19mcGnVUK3A4ZhNjKQni8MvxrA1uoSqyIpc6Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707472460; c=relaxed/simple; bh=WwEoZgYHzCrxC+Km70vhRbnfNlWbuXqwpjdl85yjWkg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qKNxQYUbcHhKRmWNIPawO1lIN4PIYskV+2kOcxGjGLdH1NpnjolfQUGXWS0qkZ2JQM9LqQY39X2mwh2jroTe71ZdjfsbkRZcl45sc7yp0qQlk3lw1QXMp1G2Xb8h8ppZdBANaWzSawsxJFhBkZICGmH9JYW/Atvn6VA3/m5BIUU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kL4I8I47; 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="kL4I8I47" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B9A7C433C7; Fri, 9 Feb 2024 09:54:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707472459; bh=WwEoZgYHzCrxC+Km70vhRbnfNlWbuXqwpjdl85yjWkg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kL4I8I478ey5Zpr0mwB0vmii6U2ndGcbowcZKIAfgbNu1VuEuGy5WWefiP0ipdWlT iQ5Dn1xlXBBWSkOu5nACHA/xjeQEexJ3xX0vvh/SVp9dNwrLvFLkFMLlqZE1iy2jkV Isg+5491MeO0UpiN+V8DXV4yvINPZylgkOw9MhpjTDKpH2+fkXheyEjqipqRQEZW1g cLY9mA55fgnOuj4jZPiZZ652HxbScbM/8ubrBAHEOJP12PqKsxvlR2+Ntww5bwsOtg ixp5MK3xm7vFwKOjTlYKLKH/fNvvMvEbbTLRWsI8giJPTUsaXs8ifACn3VesMzlA3o hju9LDkTLxj4Q== Date: Fri, 9 Feb 2024 10:54:10 +0100 From: Christian Brauner To: Roberto Sassu Cc: viro@zeniv.linux.org.uk, chuck.lever@oracle.com, jlayton@kernel.org, neilb@suse.de, kolga@netapp.com, Dai.Ngo@oracle.com, tom@talpey.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com, dhowells@redhat.com, jarkko@kernel.org, stephen.smalley.work@gmail.com, eparis@parisplace.org, casey@schaufler-ca.com, shuah@kernel.org, mic@digikod.net, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, selinux@vger.kernel.org, linux-kselftest@vger.kernel.org, Roberto Sassu Subject: Re: [PATCH v9 14/25] security: Introduce path_post_mknod hook Message-ID: <20240209-warten-anstreben-54d2c519fba8@brauner> References: <20240115181809.885385-1-roberto.sassu@huaweicloud.com> <20240115181809.885385-15-roberto.sassu@huaweicloud.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 In-Reply-To: <20240115181809.885385-15-roberto.sassu@huaweicloud.com> On Mon, Jan 15, 2024 at 07:17:58PM +0100, Roberto Sassu wrote: > From: Roberto Sassu > > In preparation for moving IMA and EVM to the LSM infrastructure, introduce > the path_post_mknod hook. > > IMA-appraisal requires all existing files in policy to have a file > hash/signature stored in security.ima. An exception is made for empty files > created by mknod, by tagging them as new files. > > LSMs could also take some action after files are created. > > The new hook cannot return an error and cannot cause the operation to be > reverted. > > Signed-off-by: Roberto Sassu > Acked-by: Casey Schaufler > Reviewed-by: Mimi Zohar > --- > fs/namei.c | 5 +++++ Acked-by: Christian Brauner