From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794661586; b=cdc+8qd/n7aHKKKwjBcRWIblj34rWHG6QOISmg8+UKnI9/L18Gg/jgiF1AX85BgtTu+1 SocyRalra8Y9yrh4dL9H+lwzwuuWIvcjOu7c1cj8hzSpj1SvGNrhvaagDR37XP6a9dYof Qcs4n8UzAjCqf22D0VmjxDt79DuRscKkupsZ15QujfVS2jq2Sq8guqYBvxgutGML7xxGX EWYaIBRNJHpJUxK1NkUdHf5Kp3Y/6owTuF4kVgMikE+fq9UrwOc9jcS6mrY4Rwg0271KS IPv1P12VoIzZevzREel9wnVuXI36mVmUFyKJ/oVCnSXCCPAr4Mb4igSPHRZ5KwlhFew== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794661586; h=Received:DKIM-Signature:From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:References:In-Reply-To:To:Cc: X-Mailer:X-Developer-Signature:X-Developer-Key; bh=sgs4W2I6jyh9uREhF01VP/+x2A31fQRHH6KrlL4045A=; b=xhxvs0HJOkY22cvcT0IEW8hk2fHzfUYQyYhZlLgYoqfEfZFjeSncBBxmBorXywudkbtp lnV/UgWHgzISW2EsFkTFjjj5TnHeyfml0ECfPuLJRlIl29Rw7CEYspMAoDHyTdN1xiPdK 3IvbiIeTq8nMKzA6omjF/Yu/mz2gdHDUWzupJC+LmD/h9I6HP7aZ8vCKUkS4Zp72UfeIF ShHox/LzG66bxKiEMvFztNmhc5C59Ro0Hog3FgcKKKFU+7hHdQ3Xlx8VrsOSt8xZ/bthm JErdSdidZ5droBd1eqt43zVWKxDjoydoVTh9I9XXZmo+OLJA5Kxw9x54fbqyKt5hyGQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="I9B+/s3S"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 44E0D606A897; Sat, 14 Nov 2026 13:06:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=I9B+/s3S Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36FFF1F000C5; Sat, 14 Nov 2026 13:06:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794661585; bh=sgs4W2I6jyh9uREhF01VP/+x2A31fQRHH6KrlL4045A=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=I9B+/s3SELG5SM0WBcJJ+bzQ/9D/re85FCznroL591YvUWc373nL+cSoL9KAp5RzK UAh2zDRAYca50XtY7i3Tv4dodLxUqwxwTo2T9y328XqGTzT8IyJSGT3uFDH00JS2T6 EmiF1Vj4PKvUBCKINcK3PbEeYMUAMCvP9Gwl/5SG+hbMaqVkskZ0molDV0KZnu3Dmp NgeJizS1V2OJr/io2hOpe8FKvhrr83bhr29d2bsfERf6pIH/dHMJUK+wRnrFmqvU3f 798wauulfg3yNQCuADzs9Ljrm2YDVHH17AWN68OdKsAAZ/GzaSDoSqD3oCKUBTXELN V6mLbqYofrsZg== From: Christian Brauner Date: Sat, 14 Nov 2026 14:01:48 +0100 Subject: [PATCH RFC v2 07/42] binfmt_misc: use fc_init_pseudo() X-Mailing-List: linux-efi@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261114-work-loop-pseudo-v2-7-98639a2286fb@kernel.org> References: <20261114-work-loop-pseudo-v2-0-98639a2286fb@kernel.org> In-Reply-To: <20261114-work-loop-pseudo-v2-0-98639a2286fb@kernel.org> To: 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, "Christian Brauner (Amutable)" , Alexander Mikhalitsyn X-Mailer: b4 0.17-dev-ce4c1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1333; i=brauner@kernel.org; h=from:subject:message-id; bh=ExZBUVvx9r18SdKJrfF6sZNEu0ZA1ZdlFfR0zqTTCHU=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT9iMlN/XnopuTFo6lJxTd/lFacnmUbf2Z+/TRuvSOBu QvLsicc7ShlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZhI9CaGf2YzWpQXz5uauPyd QYfojx9XuhxufHopucU0dfExi7nVe3UZGeYEPZk6NXJx2gyhu7MtpNqPZ5epOWzy0e3YWn9nhtf PRWwA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Initialize binfmt_misc as a pseudo filesystem instead of raising SB_I_NOEXEC and SB_I_NODEV by hand. This adds SB_I_PSEUDO. Reviewed-by: Jan Kara Reviewed-by: Alexander Mikhalitsyn Signed-off-by: Christian Brauner (Amutable) --- fs/binfmt_misc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index d945b4f6e1581..7dc233becd98d 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -1575,8 +1576,7 @@ static int bm_fill_super(struct super_block *sb, struct fs_context *fc) if (user_ns != current_user_ns()) return -EINVAL; - /* Never exec off this instance and never let anything stack on it. */ - sb->s_iflags |= SB_I_NOEXEC | SB_I_NODEV; + /* Never let anything stack on this instance. */ sb->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH; /* @@ -1660,6 +1660,7 @@ static void bm_kill_sb(struct super_block *sb) static int bm_init_fs_context(struct fs_context *fc) { + fc_init_pseudo(fc); fc->ops = &bm_context_ops; return 0; } -- 2.53.0