From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.208.49 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794564173; b=YxOKC4/cqD07wN5cpALIbbB2HzOb5kIDiTG0GikXYPtNEA0uUQY4uSiZR1bhKHJnsNsB xeWy2AEpVLtOBIgR/RC7NZ3ph+I04dC+8Xf1NbWL4fRXBTev5Bw/zbQJsjBd8eD5+daib WKepfP45IF46kbQpssubkfkd35Qlon0MtYqwOvWART80xsbpXdClwE33kPXoJnCzCSJfw rZaZ32JcfGKf20EzsmVnH3NBhkq74wcGf8zS2obSvJIpGlKFLX2nOMkA5T4j3Cv2ygEjW HWTOELbQryizM5YoxgFcdEKNN0uVxn7Efr58HTLK8zuFzeqVpe3YaBxpImiM9lFksAA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794564173; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:Content-Transfer-Encoding:User-Agent:MIME-Version; bh=QOKRfXbntKilXKCbQIPuMXmISRmnU6cXIBUGi5zYMoA=; b=2Lryk0QA3KQ45oP5xVZ4wyiGm8hjIWARlL+AhaR7chV1iFIg7hzW581IECh4dX89DrbY OQzoXsAe5xYGnAsj432czkRrcqV+5OE0qx3cDvJhWb1oB4ALurPsu0Qg3uI6AB6ytINQc dQECiS+lIz9nPcCx4Ntz/oe3OvkITmPsHey/NmwsefJg3bV6sgXp8CDGqfUkPIvWkgzeT VanrwvfaPLldBbt2xN0ILpAnI1SQdRGPmmOdtIwrBQUxW2WzPUy+hBNuv9dy/ya08RGCF QgWh7YuV9yG0FUQVkTQl9s8dTzQOf/H8djY7U/g+p+qj1EXWdPsO2LSVM4TpMXlVyeQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none header.from=amutable.com; spf=pass smtp.mailfrom=amutable.com; dkim=pass header.d=amutable-com.20260707.gappssmtp.com header.i=@amutable-com.20260707.gappssmtp.com header.a=rsa-sha256 header.s=20260707 header.b=BrRghWve; arc=none smtp.remote-ip=209.85.208.49 Received: from mail-ed1-f49.google.com (mail-ed1-f49.google.com [209.85.208.49]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D24A3606A8B7 for ; Fri, 13 Nov 2026 10:02:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D24A3606A8B7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=amutable.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amutable.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amutable-com.20260707.gappssmtp.com header.i=@amutable-com.20260707.gappssmtp.com header.a=rsa-sha256 header.s=20260707 header.b=BrRghWve Received: by mail-ed1-f49.google.com with SMTP id 4fb4d7f45d1cf-6b70880c0a4so1098387a12.2 for ; Fri, 13 Nov 2026 02:02:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amutable-com.20260707.gappssmtp.com; s=20260707; t=1794564171; x=1795168971; darn=vger.kernel.org; h=mime-version:user-agent:content-transfer-encoding:content-type :references:in-reply-to:date:cc:to:from:subject:message-id:from:to :cc:subject:date:message-id:reply-to:content-type; bh=QOKRfXbntKilXKCbQIPuMXmISRmnU6cXIBUGi5zYMoA=; b=BrRghWveZPMQ2lrGbo6B+XUgpff5EufUxldGFiTipoIaiFawRH8FVJvDBChKSCm+0U qE7NrwVrHQo2b1oiTPINBjADcjfu8j5+2hiB9wPnUB0Sj/3WgVbhatfBxMm3U8N4KnOM ecLP+89NGaRsX9nOgSryY2U8lUIJARrslqQpZFBfoMRf7b7aCNcM2ESlmVVEcyz67Zq1 nmg/xl76oWVlPrwozco+e18C71yw30j2TPM9TFHhbc2tHwAu5TUUkKbNr7mrc8DWNqok L5mLyN847Ry543yO7VRmUF69tZ0RGoya4bqZfEDQ44XXZ70j+SgMCotFLrfSWds1gzqN VQzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1794564171; x=1795168971; h=mime-version:user-agent:content-transfer-encoding:content-type :references:in-reply-to:date:cc:to:from:subject:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=QOKRfXbntKilXKCbQIPuMXmISRmnU6cXIBUGi5zYMoA=; b=qfpUyNetaMYAToZcsgsx5Dl2go2LoSxRxfYiRTcix3s/yYs4WtElRW+pa85MkQKs2+ CfWfc5YDr/JJa0BEl2sVEvWchR6nIudhHNvud/jIygp4euPKcq+BCzK/HHygdxUqiZh8 KiwYZrC6F3b8e3HyAyvffxqSQFbHBvuqC2k8ZXvryoZ8ilqZ4K2fwES9896tKHUYv9Rh buFoP/rMf/wIRpfLwuRtvzqAR3lHTxcLZT+w+iaPNcearAvwZQ0HMTJk7P3kJ3hFM4PJ GRcNWkRutuUiNsM6blzTzKNpWYo/QdPp9cHY+L9gLv/MSYvcYjXPTQ0T02aqFHx7lji+ evYQ== X-Forwarded-Encrypted: i=1; AL+hErG7eeig3yGIqAdB/jrg0hRsqIBufmqNaBf9SlWCcF0skV/AODNou/IdvXmGs3RMVHfi59YTqe8j5770Jk86gyVO5S9iB3w=@vger.kernel.org X-Gm-Message-State: APuU4Z87w8x9hOQMM0BUy6bI9J/srQYg64LRfDGVUWhCd0CgPY6b2WoB qJ+65BNOGsLW5amyW34v9B1nOIZkqkYMc0b3oJbyzRCQvl8OVnzapqsgyufR1s1yjEwW X-Gm-Gg: AYBFou2Pe6cu+injfnvyPwG+Uj6Z2Jyg0gamzAq+jb5MBDh3XNyXAsVK0mM3jaArGaF uDtn+i08YYV5QKh5vkG7bygXulY0KuTGDopDQCHbiO/ZJ2CsPVk81O7cM43lq2kBSJZZn2N5DN7 6ad5JEMnB8FR06agy8pfRhrs+V3869AFzA8p82uagcudMtnh+48UpA8Bjjjiol+hsKNv9wb+YLT 77V35PN7yplIYQXEuJ7ajgnI+SQXAqKCnWhE8tOn9W4+vA905r0rz/VURUJoHqq1i8Wd/fqvPZd HaoC1XMFLxziPHlAXEYnqRRspG/LTOVWP2EaJrA2HfjUs5Ff7XlH0S4t+jx78/HOfnN6Hn/61xn 9DRV4sGitkYhqy7ISKKQ02dBoEKzlyETdQ4lYir6k16pjaWX5A41hMbxg7/fdRG6rmduR4juRsD e9cIzuFJZnWXeaEY6pCfX/RJIZ5RYjSpPX7HbpFzReo2M2OeHDtGJK3nnLyfjWoAWybV8BZTgne Nkm6dFDHEwaU1Rr3LgbMQ9tYLNGkV1RrC6fcd+JR5CNd93LqQQkKdzpdUfPfTnV7Qh+0Hw1saF7 9sihsIOUTEmyK1XNYLagm86PLr4lvCcQtuirfGgO4ZN5460HxqqjVF8OkepnonQ= X-Received: by 2002:aa7:c842:0:b0:6b7:82cf:f69f with SMTP id 4fb4d7f45d1cf-6b7c0ceaefemr1298014a12.41.1794564171137; Fri, 13 Nov 2026 02:02:51 -0800 (PST) Received: from [10.0.0.233] (tmo-086-54.customers.d1-online.com. [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-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 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}