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[80.187.86.54]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b7c262338csm739270a12.33.2026.11.13.02.02.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 02:02:50 -0800 (PST) Message-ID: <06b194053de4f4b65895248d1f2ba29d42a21b17.camel@amutable.com> Subject: Re: [PATCH RFC 06/41] proc: 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 11:02:49 +0100 In-Reply-To: <20261110-work-loop-pseudo-v1-6-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-6-4c998976c6c7@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-block@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 procfs as a pseudo filesystem instead of raising > SB_I_NOEXEC and SB_I_NODEV by hand. This adds SB_I_PSEUDO. >=20 > Signed-off-by: Christian Brauner (Amutable) Reviewed-by: Alexander Mikhalitsyn > =C2=A0fs/proc/root.c | 4 ++-- > =C2=A01 file changed, 2 insertions(+), 2 deletions(-) >=20 > diff --git a/fs/proc/root.c b/fs/proc/root.c > index 7fbbe92bf73a..ca0e75081934 100644 > --- a/fs/proc/root.c > +++ b/fs/proc/root.c > @@ -17,6 +17,7 @@ > =C2=A0#include > =C2=A0#include > =C2=A0#include > +#include > =C2=A0#include > =C2=A0#include > =C2=A0#include > @@ -265,8 +266,6 @@ static int proc_fill_super(struct super_block *s, > struct fs_context *fc) > =C2=A0 if (ret) > =C2=A0 return ret; > =C2=A0 > - /* User space would break if executables or devices appear > on proc */ > - s->s_iflags |=3D SB_I_NOEXEC | SB_I_NODEV; > =C2=A0 s->s_flags |=3D SB_NODIRATIME | SB_NOSUID | SB_NOEXEC; > =C2=A0 s->s_blocksize =3D 1024; > =C2=A0 s->s_blocksize_bits =3D 10; > @@ -350,6 +349,7 @@ static int proc_init_fs_context(struct fs_context > *fc) > =C2=A0 put_user_ns(fc->user_ns); > =C2=A0 fc->user_ns =3D get_user_ns(ctx->pid_ns->user_ns); > =C2=A0 fc->fs_private =3D ctx; > + fc_init_pseudo(fc); > =C2=A0 fc->ops =3D &proc_fs_context_ops; > =C2=A0 return 0; > =C2=A0}