From: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
To: "Mickaël Salaün" <mic@digikod.net>
Cc: <willemdebruijn.kernel@gmail.com>,
<linux-security-module@vger.kernel.org>, <netdev@vger.kernel.org>,
<netfilter-devel@vger.kernel.org>, <yusongping@huawei.com>,
<anton.sirazetdinov@huawei.com>
Subject: Re: [PATCH v5 15/15] samples/landlock: adds network demo
Date: Tue, 24 May 2022 11:41:47 +0300 [thread overview]
Message-ID: <377fae5e-8427-c5aa-cab8-ecb5f7f897d1@huawei.com> (raw)
In-Reply-To: <0556b4ff-9a02-7095-e495-c713ca641356@digikod.net>
5/19/2022 6:09 PM, Mickaël Salaün пишет:
>
>
> On 19/05/2022 15:33, Konstantin Meskhidze wrote:
>>
>>
>> 5/17/2022 12:19 PM, Mickaël Salaün пишет:
>>>
>>>
>>> On 16/05/2022 17:20, Konstantin Meskhidze wrote:
>>>> This commit adds network demo. It's possible to
>>>> allow a sandoxer to bind/connect to a list of
>>>> particular ports restricting networks actions to
>>>> the rest of ports.
>>>>
>>>> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
>>>> ---
>>>>
>>>> Changes since v4:
>>>> * Adds ENV_TCP_BIND_NAME "LL_TCP_BIND" and
>>>> ENV_TCP_CONNECT_NAME "LL_TCP_CONNECT" variables
>>>> to insert TCP ports.
>>>> * Renames populate_ruleset() to populate_ruleset_fs().
>>>> * Adds populate_ruleset_net() and parse_port_num() helpers.
>>>> * Refactoring main() to support network sandboxing.
>>>>
>>>> ---
>
> [...]
>
>>>> if (ruleset_fd < 0) {
>>>> perror("Failed to create a ruleset");
>>>> return 1;
>>>> }
>>>> - if (populate_ruleset(ENV_FS_RO_NAME, ruleset_fd, access_fs_ro)) {
>>>> + if (populate_ruleset_fs(ENV_FS_RO_NAME, ruleset_fd, access_fs_ro))
>>>> goto err_close_ruleset;
>>>> - }
>>>
>>> Why? I know that checkpatch.pl prints a warning for that but I
>>> delibirately chooe to use curly braces even for "if" statements with
>>> one line because it is safer. This code may be copied/pasted and I'd
>>> like others to avoid introducing goto-fail-like issues.
>>>
>>
>> It was done just to reduce the number of checkpatch.pl warnings.
>> If you want it to be formated in your way I will fix it.
>
> Yes please, checkpatch.pl helps to mantain kernel code but this is a
> user space code and I prefer to follow safe practices for this kind of
> checks.
>
Ok. I will keep you code here. Thanks.
> [...]
>
>>>> diff --git a/security/landlock/ruleset.h b/security/landlock/ruleset.h
>>>> index 916b30b31c06..e1ff40f238a6 100644
>>>> --- a/security/landlock/ruleset.h
>>>> +++ b/security/landlock/ruleset.h
>>>> @@ -19,7 +19,7 @@
>>>> #include "limits.h"
>>>> #include "object.h"
>>>>
>>>> -typedef u16 access_mask_t;
>>>> +typedef u32 access_mask_t;
>>>
>>> What‽
>>
>> You are right. I will move this changes to another commit, related
>> the kernel updates. I might have forgotten to rebase this change and
>> left it in sandboxer patch. Thank you..
>
> Indeed. Please check that every commit build (without warning) and that
> the related tests are OK.
Ok. I will. Thanks.
>
>
>>>
>>>
>>>>
>>>> /* Makes sure all filesystem access rights can be stored. */
>>>> static_assert(BITS_PER_TYPE(access_mask_t) >=
>>>> LANDLOCK_NUM_ACCESS_FS);
>>>> @@ -157,7 +157,7 @@ struct landlock_ruleset {
>>>> * layers are set once and never changed for the
>>>> * lifetime of the ruleset.
>>>> */
>>>> - u32 access_masks[];
>>>> + access_mask_t access_masks[];
>>>> };
>>>> };
>>>> };
>>>> --
>>>> 2.25.1
>>>>
>>> .
> .
next prev parent reply other threads:[~2022-05-24 8:41 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-16 15:20 [PATCH v5 00/15] Network support for Landlock Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 01/15] landlock: access mask renaming Konstantin Meskhidze
2022-05-17 8:12 ` Mickaël Salaün
2022-05-18 9:16 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 02/15] landlock: landlock_find/insert_rule refactoring Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 03/15] landlock: merge and inherit function refactoring Konstantin Meskhidze
2022-05-17 8:14 ` Mickaël Salaün
2022-05-18 9:18 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 04/15] landlock: helper functions refactoring Konstantin Meskhidze
2022-05-16 17:14 ` Mickaël Salaün
2022-05-16 17:43 ` Konstantin Meskhidze
2022-05-16 18:28 ` Mickaël Salaün
2022-05-18 9:14 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 05/15] landlock: landlock_add_rule syscall refactoring Konstantin Meskhidze
2022-05-17 8:04 ` Mickaël Salaün
2022-05-17 8:10 ` Mickaël Salaün
2022-05-19 9:24 ` Konstantin Meskhidze
2022-05-19 9:23 ` Konstantin Meskhidze
2022-05-19 14:37 ` Mickaël Salaün
2022-05-24 8:35 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 06/15] landlock: user space API network support Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 07/15] landlock: add support network rules Konstantin Meskhidze
2022-05-17 8:27 ` Mickaël Salaün
2022-05-19 9:27 ` Konstantin Meskhidze
2022-05-19 14:42 ` Mickaël Salaün
2022-05-24 8:36 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 08/15] landlock: TCP network hooks implementation Konstantin Meskhidze
2022-05-17 8:51 ` Mickaël Salaün
2022-05-19 11:40 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 09/15] seltests/landlock: add tests for bind() hooks Konstantin Meskhidze
2022-05-16 21:11 ` Mickaël Salaün
2022-05-19 12:10 ` Konstantin Meskhidze
2022-05-19 14:29 ` Mickaël Salaün
2022-05-24 8:34 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 10/15] seltests/landlock: add tests for connect() hooks Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 11/15] seltests/landlock: connect() with AF_UNSPEC tests Konstantin Meskhidze
2022-05-17 8:55 ` Mickaël Salaün
2022-05-19 12:31 ` Konstantin Meskhidze
2022-05-19 15:00 ` Mickaël Salaün
2022-05-24 8:40 ` Konstantin Meskhidze
2022-05-19 15:02 ` Mickaël Salaün
2022-05-24 8:42 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 12/15] seltests/landlock: rules overlapping test Konstantin Meskhidze
2022-05-16 17:41 ` Mickaël Salaün
2022-05-19 12:24 ` Konstantin Meskhidze
2022-05-19 15:04 ` Mickaël Salaün
2022-05-24 8:55 ` Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 13/15] seltests/landlock: ruleset expanding test Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 14/15] seltests/landlock: invalid user input data test Konstantin Meskhidze
2022-05-16 15:20 ` [PATCH v5 15/15] samples/landlock: adds network demo Konstantin Meskhidze
2022-05-17 9:19 ` Mickaël Salaün
2022-05-19 13:33 ` Konstantin Meskhidze
2022-05-19 15:09 ` Mickaël Salaün
2022-05-24 8:41 ` Konstantin Meskhidze [this message]
2022-05-20 10:48 ` [PATCH v5 00/15] Network support for Landlock - UDP discussion Mickaël Salaün
2022-05-25 9:41 ` Konstantin Meskhidze
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