From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.218.49 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794564190; b=obPg++OxhVAIy3XdF7eKOw4xDeeVt1eUV6zePopZdvMqFOkbgmV81IO3ZNw82SyG/rWx UyBSIwupEAU7r/Sv0Bcdb4NpuASd4aXaqQhfl0li3F3s/lfvZDuQp7I5pxbwEd/GzMYIy lvZSg63V8KRz3YVgZI7aL2LKAk7K25sXpw3e72f+/Win4DxeoF81BHO1FsDZ2XeYO8b/l oWhm9FgLbJ80oxaaSTacbeUzf83fDif0yOfFoFxWpdFIJae3Qqf2a6HVTqaDm01w8yj2l UXgbrPcGra5/ETMwdzvh1Z/Y62wxuDyIA/oY/V8Yq6X+KAfky7kng51SqtqedEwZvpA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794564190; 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=SoW/gPie2WRRtXdhiV6ow6HDYwH4jtR4w1oiMzBwW74=; b=GaFAip1WLD4OhgbNXjqr71My/cdCmxYoMh/VaCylNt6Wv/SvoWkRHkQvcOrecgsG356w H/PFKgMjx6UivpvqMHXrrqJ+VEtaIJutq50gWY1IVsdw575SI4WFsDOeNydXSNhkv26sz Q25pA6+6FK7fE2+vvEyANG9jLFEoe/Uv3QqyD8NByOvVy5g3PhQZpAfYgZ7YemRQaAoPs U/keXnNp4Qx42fmOME5iN4gv1ugZCDUxsgGTsjYAAf4UNsuUz7RTaTz1jsj5M54ljcIvy AN4p3YzbVPN5Mr+cJn9U7cVbpIZjRpCgdXrCpGHatYOkz0H8Xvv42sBbyBHUW1JG4kQ== 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=PwLaWWEZ; arc=none smtp.remote-ip=209.85.218.49 Received: from mail-ej1-f49.google.com (mail-ej1-f49.google.com [209.85.218.49]) (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 59B70606A88F for ; Fri, 13 Nov 2026 10:03:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 59B70606A88F 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=PwLaWWEZ Received: by mail-ej1-f49.google.com with SMTP id a640c23a62f3a-c4d473cfff6so128195566b.0 for ; Fri, 13 Nov 2026 02:03:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amutable-com.20260707.gappssmtp.com; s=20260707; t=1794564188; x=1795168988; 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=SoW/gPie2WRRtXdhiV6ow6HDYwH4jtR4w1oiMzBwW74=; b=PwLaWWEZlovk3BcnO0ZG64105bcHT1OuSddm6BbnvIqxbrPzt9auj7esmk6BNbh6fX VcVz0Fb5EO25ZFbwJkkdsGMVKdakOQPzqU2f6LPhtUiDBhEZmXH+cAuxyn5j0/PSwsaT RO2aU2TU8aCmd84MLoXz7vnHjZWZq5qT0/Sc6gtTAg3UhyfQddRWFsH5ep7YUVPW4oOS ZJYdPFjeA/srAxsT7bXr7CLtpXwYO3HrhRePJ9C+1IlKmxOGPfhyvFsMUb4DHUYdYyHA n68GAxpj0xAii+OfqqKyb+8UpP8WFZF+WeKZ9rpWrZ/4EfgHnKqz0J1mnDjnDglQmq1u ISGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1794564188; x=1795168988; 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=SoW/gPie2WRRtXdhiV6ow6HDYwH4jtR4w1oiMzBwW74=; b=Ot4KvsftZTXFg5EQ7ka21wdMzK095xTrHVOtpDOqXHVlf3PlRs054nkN/L9fEiacq/ z7FyCaeoNll+nZlpwvrFiR6pjnHZ2luHUH0y9Bo0oEJLeZyfb5oHRcunTOS9BYtivfjY y5KnX7OktZ+s2pu4nXIaMq4E46j9LKMS51uobkp5LGN5e5n+cUKN7pamDVZsfwZBybQ+ Z7JwCiz5sXgkLIjD2BCcCjRnyiWcUS0PzM7rMoNjX1jYAEhwJSgzNOqwzoJSd3Vt+TNk bMOz64WnsmnVPmD3jD3weMRgYXxnrD1bWpuaMAzsxi0IFwyzwi3F4Om6zKMlbHKVx3e9 OOfg== X-Forwarded-Encrypted: i=1; AL+hErEiRoNzW+J+7rHnLvhXg4IK+HEokx34QDeiB20UXRxlQ3SSiKzv8qMvsmEFBff+PKH3TrcGHeg=@vger.kernel.org X-Gm-Message-State: APuU4Z97L7LKOgmqsuB9Jz6ZGZ1f9Mwpi5HMUjYWohSlkF7R8PDkTaFB af076jLL6wlCQywicOsZVPVGAi43xL00uhLXKowSSFkz9fJj4IZFL8/B3GxEGzmu8TyH X-Gm-Gg: AYBFou3aJu3VWLN9cPsd691O2+OwgwcTocOQKWbcUfWKYPn+X9mxvpVfPrfo35ywqxr u2loxRuHg9eqnptyX9HoETCY4rSr0GQbqH/rmXu6Fm1wBqsIBbBBMbnHcSGyxK8eJFdl/+fGsyQ eZED2lYyzibifGysVq/lvabZ32Pn772eQ4XW1t/67d4ZM6o5QktEsuY2AfKou9ZCPtQGZAotwsn 72vx1rAKaqP2ylaLceoQs7fM24L6nXgVTb+qsf8rDUUUy0JOctjuAF/sgKWoVqYctixxvq0s+5A RbVCfEJbnAvEK8MixSKyzKou/TPFfC7G6HZyNpwod2ZzGrqcBJOxfPFVav2J3djJUMUjEpS4sTd +k47PrlEWXkXbz/KxxQSrNtz8tkfqsBG1efiXmrsacwVGpPWZd9z4scguz8xjCB+1AdsFfD4+U8 ewamagHGuSVM99HR+xjhSuWPOlCuoe5ebcRe20cbqnJ/c7NPghdXgU+OSRsohb5GW7pxIRohTbx koBiBnR63OlJsxqUcuZvhC2M7kI7K9QZ8XgwftYPdYFD64oYTvaCDeVPvf+8b/FBM1i8RDuV9bE txRVygO481PLCibRysNbKLI44yKrCPnQ2j3d+oERkMIDA7Q1 X-Received: by 2002:a17:907:d12:b0:c4c:b4fe:c9e8 with SMTP id a640c23a62f3a-c50963dbee5mr161853166b.38.1794564187801; Fri, 13 Nov 2026 02:03:07 -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 a640c23a62f3a-c5095b3dbaesm74933966b.32.2026.11.13.02.03.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 02:03:07 -0800 (PST) Message-ID: Subject: Re: [PATCH RFC 07/41] binfmt_misc: 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 11:03:05 +0100 In-Reply-To: <20261110-work-loop-pseudo-v1-7-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-7-4c998976c6c7@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: netdev@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 binfmt_misc 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/binfmt_misc.c | 5 +++-- > =C2=A01 file changed, 3 insertions(+), 2 deletions(-) >=20 > diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c > index d945b4f6e158..7dc233becd98 100644 > --- a/fs/binfmt_misc.c > +++ b/fs/binfmt_misc.c > @@ -22,6 +22,7 @@ > =C2=A0#include > =C2=A0#include > =C2=A0#include > +#include > =C2=A0#include > =C2=A0#include > =C2=A0#include > @@ -1575,8 +1576,7 @@ static int bm_fill_super(struct super_block > *sb, struct fs_context *fc) > =C2=A0 if (user_ns !=3D current_user_ns()) > =C2=A0 return -EINVAL; > =C2=A0 > - /* Never exec off this instance and never let anything stack > on it. */ > - sb->s_iflags |=3D SB_I_NOEXEC | SB_I_NODEV; > + /* Never let anything stack on this instance. */ > =C2=A0 sb->s_stack_depth =3D FILESYSTEM_MAX_STACK_DEPTH; > =C2=A0 > =C2=A0 /* > @@ -1660,6 +1660,7 @@ static void bm_kill_sb(struct super_block *sb) > =C2=A0 > =C2=A0static int bm_init_fs_context(struct fs_context *fc) > =C2=A0{ > + fc_init_pseudo(fc); > =C2=A0 fc->ops =3D &bm_context_ops; > =C2=A0 return 0; > =C2=A0}