From: "Mickaël Salaün" <mic@digikod.net>
To: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Cc: willemdebruijn.kernel@gmail.com, gnoack3000@gmail.com,
linux-security-module@vger.kernel.org, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, yusongping@huawei.com,
artem.kuzin@huawei.com
Subject: Re: [PATCH v9 06/12] landlock: Refactor _unmask_layers() and _init_layer_masks()
Date: Fri, 10 Feb 2023 18:38:25 +0100 [thread overview]
Message-ID: <70b5c38d-117e-0b07-f942-8025a83a3df7@digikod.net> (raw)
In-Reply-To: <20230116085818.165539-7-konstantin.meskhidze@huawei.com>
On 16/01/2023 09:58, Konstantin Meskhidze wrote:
> Add new key_type argument to the landlock_init_layer_masks() helper.
> Add a masks_array_size argument to the landlock_unmask_layers() helper.
> These modifications support implementing new rule types in the next
> Landlock versions.
>
> Signed-off-by: Mickaël Salaün <mic@digikod.net>
> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
> ---
>
> Changes since v8:
> * None.
>
> Changes since v7:
> * Refactors commit message, adds a co-developer.
> * Minor fixes.
>
> Changes since v6:
> * Removes masks_size attribute from init_layer_masks().
> * Refactors init_layer_masks() with new landlock_key_type.
>
> Changes since v5:
> * Splits commit.
> * Formats code with clang-format-14.
>
> Changes since v4:
> * Refactors init_layer_masks(), get_handled_accesses()
> and unmask_layers() functions to support multiple rule types.
> * Refactors landlock_get_fs_access_mask() function with
> LANDLOCK_MASK_ACCESS_FS mask.
>
> Changes since v3:
> * Splits commit.
> * Refactors landlock_unmask_layers functions.
>
> ---
> security/landlock/fs.c | 43 ++++++++++++++++--------------
> security/landlock/ruleset.c | 52 ++++++++++++++++++++++++++-----------
> security/landlock/ruleset.h | 17 ++++++------
> 3 files changed, 70 insertions(+), 42 deletions(-)
>
> diff --git a/security/landlock/fs.c b/security/landlock/fs.c
> index 73a7399f93ba..a73dbd3f9ddb 100644
> --- a/security/landlock/fs.c
> +++ b/security/landlock/fs.c
>
[...]
> @@ -658,10 +677,13 @@ access_mask_t landlock_init_layer_masks(
> const unsigned long access_req = access_request;
> unsigned long access_bit;
>
> - for_each_set_bit(access_bit, &access_req,
> - ARRAY_SIZE(*layer_masks)) {
> + for_each_set_bit(access_bit, &access_req, num_access) {
> + /*
> + * Artificially handles all initially denied by default
> + * access rights.
> + */
No need to re-add this old comment which was removed with patch 2/12.
> if (BIT_ULL(access_bit) &
> - landlock_get_fs_access_mask(domain, layer_level)) {
> + get_access_mask(domain, layer_level)) {
> (*layer_masks)[access_bit] |=
> BIT_ULL(layer_level);
> handled_accesses |= BIT_ULL(access_bit);
> diff --git a/security/landlock/ruleset.h b/security/landlock/ruleset.h
> index 60a3c4d4d961..77349764e111 100644
> --- a/security/landlock/ruleset.h
> +++ b/security/landlock/ruleset.h
> @@ -266,14 +266,15 @@ landlock_get_fs_access_mask(const struct landlock_ruleset *const ruleset,
> return landlock_get_raw_fs_access_mask(ruleset, layer_level) |
> ACCESS_FS_INITIALLY_DENIED;
> }
> -bool landlock_unmask_layers(
> - const struct landlock_rule *const rule,
> - const access_mask_t access_request,
> - layer_mask_t (*const layer_masks)[LANDLOCK_NUM_ACCESS_FS]);
> +bool landlock_unmask_layers(const struct landlock_rule *const rule,
> + const access_mask_t access_request,
> + layer_mask_t (*const layer_masks)[],
> + const size_t masks_array_size);
>
> -access_mask_t landlock_init_layer_masks(
> - const struct landlock_ruleset *const domain,
> - const access_mask_t access_request,
> - layer_mask_t (*const layer_masks)[LANDLOCK_NUM_ACCESS_FS]);
> +access_mask_t
> +landlock_init_layer_masks(const struct landlock_ruleset *const domain,
> + const access_mask_t access_request,
> + layer_mask_t (*const layer_masks)[],
> + const enum landlock_key_type key_type);
>
> #endif /* _SECURITY_LANDLOCK_RULESET_H */
next prev parent reply other threads:[~2023-02-10 17:38 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-16 8:58 [PATCH v9 00/12] Network support for Landlock Konstantin Meskhidze
2023-01-16 8:58 ` [PATCH v9 01/12] landlock: Make ruleset's access masks more generic Konstantin Meskhidze
2023-01-16 8:58 ` [PATCH v9 02/12] landlock: Allow filesystem layout changes for domains without such rule type Konstantin Meskhidze
2023-02-10 17:34 ` Mickaël Salaün
2023-02-14 8:51 ` Konstantin Meskhidze (A)
2023-02-14 12:07 ` Mickaël Salaün
2023-02-14 12:57 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 03/12] landlock: Refactor landlock_find_rule/insert_rule Konstantin Meskhidze
2023-02-10 17:36 ` Mickaël Salaün
2023-02-14 10:15 ` Konstantin Meskhidze (A)
2023-02-14 12:09 ` Mickaël Salaün
2023-02-14 13:28 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 04/12] landlock: Refactor merge/inherit_ruleset functions Konstantin Meskhidze
2023-01-16 8:58 ` [PATCH v9 05/12] landlock: Move and rename umask_layers() and init_layer_masks() Konstantin Meskhidze
2023-02-10 17:37 ` Mickaël Salaün
2023-02-14 10:15 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 06/12] landlock: Refactor _unmask_layers() and _init_layer_masks() Konstantin Meskhidze
2023-02-10 17:38 ` Mickaël Salaün [this message]
2023-02-14 10:16 ` Konstantin Meskhidze (A)
2023-02-21 18:07 ` Mickaël Salaün
2023-03-06 7:52 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 07/12] landlock: Refactor landlock_add_rule() syscall Konstantin Meskhidze
2023-02-10 17:38 ` Mickaël Salaün
2023-02-14 10:18 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 08/12] landlock: Add network rules and TCP hooks support Konstantin Meskhidze
2023-02-10 17:39 ` Mickaël Salaün
2023-02-14 10:19 ` Konstantin Meskhidze (A)
2023-03-13 9:33 ` Konstantin Meskhidze (A)
2023-03-14 12:13 ` Mickaël Salaün
2023-03-14 14:38 ` Konstantin Meskhidze (A)
2023-02-21 18:04 ` Mickaël Salaün
2023-03-06 10:18 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 09/12] selftests/landlock: Share enforce_ruleset() Konstantin Meskhidze
2023-01-16 8:58 ` [PATCH v9 10/12] selftests/landlock: Add 10 new test suites dedicated to network Konstantin Meskhidze
2023-02-10 17:40 ` Mickaël Salaün
2023-02-14 10:36 ` Konstantin Meskhidze (A)
2023-02-14 12:13 ` Mickaël Salaün
2023-02-14 13:28 ` Konstantin Meskhidze (A)
2023-02-21 18:05 ` Mickaël Salaün
2023-03-06 12:03 ` Konstantin Meskhidze (A)
2023-03-06 16:00 ` Mickaël Salaün
2023-03-06 18:13 ` Konstantin Meskhidze (A)
2023-01-16 8:58 ` [PATCH v9 11/12] samples/landlock: Add network demo Konstantin Meskhidze
2023-01-16 8:58 ` [PATCH v9 12/12] landlock: Document Landlock's network support Konstantin Meskhidze
2023-01-21 23:07 ` Günther Noack
2023-01-23 9:38 ` Konstantin Meskhidze (A)
2023-01-27 18:22 ` Mickaël Salaün
2023-01-30 10:03 ` Konstantin Meskhidze (A)
2023-02-21 16:16 ` Mickaël Salaün
2023-03-06 13:43 ` Konstantin Meskhidze (A)
2023-03-06 16:09 ` Mickaël Salaün
2023-03-06 17:55 ` Konstantin Meskhidze (A)
2023-01-30 12:26 ` Konstantin Meskhidze (A)
2023-02-23 22:17 ` [PATCH v9 00/12] Network support for Landlock Günther Noack
2023-03-06 7:45 ` Konstantin Meskhidze (A)
2023-03-13 17:16 ` Konstantin Meskhidze (A)
2023-03-14 13:28 ` Mickaël Salaün
2023-06-26 15:29 ` [PATCH v9 00/12] Network support for Landlock - allowed list of protocols Mickaël Salaün
2023-06-28 2:33 ` Jeff Xu
2023-06-28 19:03 ` Mickaël Salaün
2023-06-28 21:56 ` Jeff Xu
2023-06-28 8:44 ` Günther Noack
2023-06-28 17:03 ` Jeff Xu
2023-06-28 19:29 ` Mickaël Salaün
2023-06-29 3:18 ` Jeff Xu
2023-06-29 11:07 ` Mickaël Salaün
2023-06-30 4:18 ` Jeff Xu
2023-06-30 18:23 ` Mickaël Salaün
2023-07-05 15:00 ` Jeff Xu
2023-07-12 11:30 ` Mickaël Salaün
2023-07-13 13:20 ` Konstantin Meskhidze (A)
2023-07-13 14:52 ` Mickaël Salaün
2023-07-13 11:44 ` Konstantin Meskhidze (A)
2023-06-28 19:07 ` Mickaël Salaün
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