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 8938E338F20; Wed, 29 Oct 2025 12:21:03 +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=1761740463; cv=none; b=PDJqaFdIxNjK5o5jEZsPx6zMkcIbTKTt686vjwLF41rijzKCyBiDTvaP9hJQ2ayXK+dNp2msKiV5l+mvw1USZADTCY//3UQt1zHB8brSO9dCi9miQkFn606gQv6Odfr+x5KkDLFhS1zShzPVSh/+4DzXhDE8+X4ERfAWxnNZxc0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761740463; c=relaxed/simple; bh=m75eXqeDmMvm5b7r1HJsIkrDxEr0RA5dkfPo14u0VyE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DXOW01gA/vc5nJBzEXufcHYL+2eZL5Dm9HiNWgOoXHn7QJHoQH8StOOB/P964eJxqKwRISXmQQwJoUh1LJVtQU31fwcWcoXxrEU0Dj/FtR6xYHBM8ynqHh4Watfp0sCarad1dUV/xqIgmjSqhiXNdRqYH+7mxabGHjR3uNZnz6g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=u4T2WXJG; 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="u4T2WXJG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 981A8C116B1; Wed, 29 Oct 2025 12:20:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761740463; bh=m75eXqeDmMvm5b7r1HJsIkrDxEr0RA5dkfPo14u0VyE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=u4T2WXJG5fDPT1OuGF7nqAbnxfh3m1ThgpI8iXmrJzEkEOksPRhiT0bxmqdrVxRh3 dJ/CbLWwvvbmsdMLg3GIph8kib2nF3ktnDyjTujyg2gw/0HxxSrTlg7OXgtkXkjtDd e8Ms0DI0ILRFDrqhxDd6y3FKskhbSIRkiUzMHOkNwRkk0iy6fvMd46DAQWCdu4Q3Hm NU8MrfPro0HsX8doXatToimIcbupWurkc7g4RhyGCZgxPsY2KvC/ST2eag+7iLYWvV 3VCIfb2SlN8GwRC3CcMIOk0H8Qol263PH4kG+T2zZXP3H/wvez87hWM+zmH1zahaDa EUaZq8eSszBew== From: Christian Brauner Date: Wed, 29 Oct 2025 13:20:18 +0100 Subject: [PATCH v4 05/72] 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: <20251029-work-namespace-nstree-listns-v4-5-2e6f823ebdc0@kernel.org> References: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@kernel.org> In-Reply-To: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@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=627; i=brauner@kernel.org; h=from:subject:message-id; bh=m75eXqeDmMvm5b7r1HJsIkrDxEr0RA5dkfPo14u0VyE=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQysfWcZu7QuNdqYVBzoniT8H3WpXOb53PcWPnoUuW0o rkb2uwmdJSyMIhxMciKKbI4tJuEyy3nqdhslKkBM4eVCWQIAxenAExk/2ZGhnOqW6fn3M07N3OV OlOwaGGT1FnDSfeiOHZFqsw17H74146R4ev83WfXKr3aI3nbNufMfr1JBUfuXt1w80LRLoW/J5m t/vADAA== 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 | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/nsfs.c b/fs/nsfs.c index 0e3fe8fda5bf..6889922d8175 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -589,6 +589,7 @@ 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 | SB_I_NODEV; ctx->s_d_flags |= DCACHE_DONTCACHE; ctx->ops = &nsfs_ops; ctx->eops = &nsfs_export_operations; -- 2.47.3