From: sashiko-bot@kernel.org
To: "Justin Suess" <utilityemal77@gmail.com>
Cc: linux-security-module@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [RFC PATCH bpf-next 02/12] namei: add vfs_walk_ancestors()
Date: Tue, 06 Oct 2026 00:30:52 +0000 [thread overview]
Message-ID: <20261006003053.1C65C1F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20261006002020.2890858-3-utilityemal77@gmail.com>
> Add a callback-based walk over a path and its ancestors, built on
> __path_walk_parent(): the kernel owns the loop and the callback must
> not sleep, so an rcu-walk engine can be added later without changing
> the API.
>
> Disconnected root dentries are reported to the callback instead of
> terminating the walk; continuing over one resumes at the root of its
> mount. A disconnected mountpoint landed on by a mount crossing - the
> one position this walk visits that a dget_parent()/follow_up() loop
> never does - is additionally flagged VFS_WALK_POS_MOUNTPOINT, so
> security callers can reproduce their pre-conversion evaluation
> sequence exactly.
>
> Suggested-by: NeilBrown <neil@brown.name>
> Suggested-by: Christian Brauner <brauner@kernel.org>
> Signed-off-by: Justin Suess <utilityemal77@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261006002020.2890858-1-utilityemal77@gmail.com?part=2
next prev parent reply other threads:[~2026-10-06 0:30 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 0:20 [RFC PATCH bpf-next 00/12] fs: unified VFS ancestor walk for Landlock and BPF Justin Suess
2026-10-06 0:20 ` [RFC PATCH bpf-next 01/12] namei: introduce __path_walk_parent() Justin Suess
2026-10-06 0:27 ` sashiko-bot
2026-10-06 0:20 ` [RFC PATCH bpf-next 02/12] namei: add vfs_walk_ancestors() Justin Suess
2026-10-06 0:30 ` sashiko-bot [this message]
2026-10-06 0:20 ` [RFC PATCH bpf-next 03/12] landlock: convert ancestor walk to vfs_walk_ancestors() Justin Suess
2026-10-06 0:27 ` sashiko-bot
2026-10-06 1:10 ` bot+bpf-ci
2026-10-06 0:20 ` [RFC PATCH bpf-next 04/12] bpf: mark struct path trusted Justin Suess
2026-10-06 0:34 ` sashiko-bot
2026-10-06 1:10 ` bot+bpf-ci
2026-10-06 0:20 ` [RFC PATCH bpf-next 05/12] namei: make vfs_walk_ancestors() stepwise Justin Suess
2026-10-06 0:30 ` sashiko-bot
2026-10-06 0:20 ` [RFC PATCH bpf-next 06/12] bpf: add a path ancestor iterator Justin Suess
2026-10-06 0:30 ` sashiko-bot
2026-10-06 1:11 ` bot+bpf-ci
2026-10-06 0:20 ` [RFC PATCH bpf-next 07/12] selftests/bpf: exercise the " Justin Suess
2026-10-06 0:28 ` sashiko-bot
2026-10-06 1:10 ` bot+bpf-ci
2026-10-06 0:20 ` [RFC PATCH bpf-next 08/12] fs: add mnt_undo_legitimize() Justin Suess
2026-10-06 0:28 ` sashiko-bot
2026-10-06 0:20 ` [RFC PATCH bpf-next 09/12] namei: add an rcu-walk mode to the ancestor walk Justin Suess
2026-10-06 0:33 ` sashiko-bot
2026-10-06 1:10 ` bot+bpf-ci
2026-10-06 0:20 ` [RFC PATCH bpf-next 10/12] bpf: support "__uninit" iterator arguments in generic kfuncs Justin Suess
2026-10-06 0:37 ` sashiko-bot
2026-10-06 14:58 ` Justin Suess
2026-10-06 0:20 ` [RFC PATCH bpf-next 11/12] bpf: add a lockless path ancestor iterator Justin Suess
2026-10-06 0:31 ` sashiko-bot
2026-10-06 1:10 ` bot+bpf-ci
2026-10-06 14:44 ` Justin Suess
2026-10-06 0:20 ` [RFC PATCH bpf-next 12/12] selftests/bpf: exercise the " Justin Suess
2026-10-06 0:25 ` sashiko-bot
2026-10-06 1:10 ` bot+bpf-ci
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