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[80.187.86.54]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-49c5a32d336sm4988050f8f.0.2026.11.13.02.10.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 02:10:55 -0800 (PST) Message-ID: <0894c601b3f3c5b92008c6c399faaa539b658307.camel@amutable.com> Subject: Re: [PATCH RFC 17/41] securityfs: use fc_init_pseudo() From: Alexander Mikhalitsyn To: Christian Brauner , linux-fsdevel@vger.kernel.org Cc: 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 Date: Fri, 13 Nov 2026 11:10:52 +0100 In-Reply-To: <20261110-work-loop-pseudo-v1-17-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-17-4c998976c6c7@kernel.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-0+deb13u1 X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 On Tue, 2026-11-10 at 10:14 +0100, Christian Brauner wrote: > Initialize securityfs as a pseudo filesystem. This raises SB_I_PSEUDO > and > also SB_I_NOEXEC and SB_I_NODEV. securityfs never holds executables > or > device nodes. >=20 > AppArmor puts a .null device node into securityfs but only ever opens > it via dentry_open() which doesn't care about SB_I_NODEV. >=20 > Signed-off-by: Christian Brauner (Amutable) Reviewed-by: Alexander Mikhalitsyn > --- > =C2=A0security/inode.c | 2 ++ > =C2=A01 file changed, 2 insertions(+) >=20 > diff --git a/security/inode.c b/security/inode.c > index 080402367674..93997a9f16fc 100644 > --- a/security/inode.c > +++ b/security/inode.c > @@ -14,6 +14,7 @@ > =C2=A0#include > =C2=A0#include > =C2=A0#include > +#include > =C2=A0#include > =C2=A0#include > =C2=A0#include > @@ -64,6 +65,7 @@ static const struct fs_context_operations > securityfs_context_ops =3D { > =C2=A0 > =C2=A0static int securityfs_init_fs_context(struct fs_context *fc) > =C2=A0{ > + fc_init_pseudo(fc); > =C2=A0 fc->ops =3D &securityfs_context_ops; > =C2=A0 return 0; > =C2=A0}