From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 297BC3126B0; Fri, 24 Oct 2025 10:53:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761303207; cv=none; b=P3h/tWYaAVLYEJohiagi9Dqc201Gb6tmT63JEhfWW99juw8mqUnPb6LGuqrj1uaOGMSGu2eUZ3wOOETLWXWIRVmeZbOEYGvTJ3V0TTzzsjeiiQosrjksyBWwYYIx0CCVpKEcTWI1GDr+vUu8uMV1M0B4JJicFd1L3IaxlHdK3g0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761303207; c=relaxed/simple; bh=KoKI9phRTGMhjpn+9D8BgtjcoxSIgpJa0JnjxzKpEbY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=RHJtsyqbZUcaFKRjuIioXPNuikuN0EX1Vm3g/Ic1fG8e4RFcHMG+aqI69bZdP5F5HLxPl4ujIN1vngpqp5oYdNTMnJYfuCKjDeIzr8rrhVc/0h9a5EVtKcFdbGQ0b9aHktwjvXW7jOuDj5Oo+T9JboYxw8OwVBwNbm/lr+Z/fEg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LQtZcKCU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LQtZcKCU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CA43C4CEF5; Fri, 24 Oct 2025 10:53:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761303206; bh=KoKI9phRTGMhjpn+9D8BgtjcoxSIgpJa0JnjxzKpEbY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=LQtZcKCUECJ4AiyPF2OogZQsWCHtGi6dLz4z5WiF+jcJKEU1YPkl+IE0BszPeq80w 2X/RQm89VASsp7NYMx0NydKahTT/39rek7p6HtJ8gUtpsfegaE4nfpjNd3IAlvVWF2 bqFSX9E1l+54aEP4WR8e/0zn/c4TWikaA2GzhRLkGm2WfkVHVwaQdVie9kjRBfbvVw u/PWo1i/aTPPoved4Jft5yUttujrHHlB/ufkNTEbksDOfR/9+IE9vLIg1Qcn/hm/TN hPeoRKzIqdAOoPUuv5pv97Zeon/s0VqnEBB2zMePx5MAgfybKWpVXb9xNlkuuQCDcw VyR4ZoNMUUvUQ== From: Christian Brauner Date: Fri, 24 Oct 2025 12:52:34 +0200 Subject: [PATCH v3 05/70] nsfs: raise SB_I_NODEV and SB_I_NOEXEC Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251024-work-namespace-nstree-listns-v3-5-b6241981b72b@kernel.org> References: <20251024-work-namespace-nstree-listns-v3-0-b6241981b72b@kernel.org> In-Reply-To: <20251024-work-namespace-nstree-listns-v3-0-b6241981b72b@kernel.org> To: linux-fsdevel@vger.kernel.org, Josef Bacik , Jeff Layton Cc: Jann Horn , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Lennart Poettering , Daan De Meyer , Aleksa Sarai , Amir Goldstein , Tejun Heo , Johannes Weiner , Thomas Gleixner , Alexander Viro , Jan Kara , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, Eric Dumazet , Jakub Kicinski , netdev@vger.kernel.org, Arnd Bergmann , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=647; i=brauner@kernel.org; h=from:subject:message-id; bh=KoKI9phRTGMhjpn+9D8BgtjcoxSIgpJa0JnjxzKpEbY=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT8jmp5KrkxSMG6zOj1lnJ36biiyFv7myOS7UtNHeX6d vXfWszRUcrCIMbFICumyOLQbhIut5ynYrNRpgbMHFYmkCEMXJwCMJECL4Z/ej+/Ke0Q7OAurDrA 0uD37EfOOrkw3Wux31XOlF3hDV7znZHhoKroxDQWCYH5k98yGO1TNhO9GnN9M/c9FWaeuJVTNU4 wAAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 There's zero need for nsfs to allow device nodes or execution. Signed-off-by: Christian Brauner --- fs/nsfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nsfs.c b/fs/nsfs.c index 0e3fe8fda5bf..363be226e357 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -589,6 +589,8 @@ static int nsfs_init_fs_context(struct fs_context *fc) struct pseudo_fs_context *ctx = init_pseudo(fc, NSFS_MAGIC); if (!ctx) return -ENOMEM; + fc->s_iflags |= SB_I_NOEXEC; + fc->s_iflags |= SB_I_NODEV; ctx->s_d_flags |= DCACHE_DONTCACHE; ctx->ops = &nsfs_ops; ctx->eops = &nsfs_export_operations; -- 2.47.3