From: "Mickaël Salaün" <mic@digikod.net>
To: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Cc: linux-security-module@vger.kernel.org, netdev@vger.kernel.org,
netfilter@vger.kernel.org, yusongping@huawei.com,
artem.kuzin@huawei.com
Subject: Re: [RFC PATCH 2/2] landlock: selftests for bind and connect hooks
Date: Thu, 24 Feb 2022 10:55:09 +0100 [thread overview]
Message-ID: <b29b2049-a61b-31a0-c4b5-fc0e55ad7bf1@digikod.net> (raw)
In-Reply-To: <a95b208c-5377-cf5c-0b4d-ce6b4e4b1b05@huawei.com>
On 24/02/2022 04:18, Konstantin Meskhidze wrote:
>
>
> 2/1/2022 9:31 PM, Mickaël Salaün пишет:
>>
>> On 24/01/2022 09:02, Konstantin Meskhidze wrote:
>>> Support 4 tests for bind and connect networks actions:
>>
>> Good to see such tests!
>>
>>
>>> 1. bind() a socket with no landlock restrictions.
>>> 2. bind() sockets with landllock restrictions.
>>
>> You can leverage the FIXTURE_VARIANT helpers to factor out this kind
>> of tests (see ptrace_test.c).
>>
>>
>>> 3. connect() a socket to listening one with no landlock restricitons.
>>> 4. connect() sockets with landlock restrictions.
>>
>> Same here, you can factor out code. I guess you could create helpers
>> for client and server parts.
>>
>> We also need to test with IPv4, IPv6 and the AF_UNSPEC tricks.
>>
>> Please provide the kernel test coverage and explain why the uncovered
>> code cannot be covered:
>> https://www.kernel.org/doc/html/latest/dev-tools/gcov.html
>
> Hi Mickaёl!
> Could you please provide the example of your test coverage build
> process? Cause as I undersatand there is no need to get coverage data
> for the entire kernel, just for landlock files.
You just need to follow the documentation:
- start the VM with the kernel appropriately configured for coverage;
- run all the Landlock tests;
- gather the coverage and shutdown the VM;
- use lcov and genhtml to create the web pages;
- look at the coverage for security/landlock/
>>
>> You'll probably see that there are a multiple parts of the kernel that
>> are not covered. For instance, it is important to test different
>> combinations of layered network rules (see layout1/ruleset_overlap,
>> layer_rule_unions, non_overlapping_accesses,
>> interleaved_masked_accesses… in fs_test.c). Tests in fs_test.c are
>> more complex because handling file system rules is more complex, but
>> you can get some inspiration in it, especially the edge cases.
>>
>> We also need to test invalid user space supplied data (see
>> layout1/inval test in fs_test.c).
next prev parent reply other threads:[~2022-02-24 9:55 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-24 8:02 [RFC PATCH 0/2] landlock network implementation cover letter Konstantin Meskhidze
2022-01-24 8:02 ` [RFC PATCH 1/2] landlock: TCP network hooks implementation Konstantin Meskhidze
2022-01-25 14:17 ` Willem de Bruijn
2022-01-26 8:05 ` Konstantin Meskhidze
2022-01-26 14:15 ` Willem de Bruijn
2022-01-29 3:12 ` Konstantin Meskhidze
2022-01-31 17:14 ` Willem de Bruijn
2022-02-01 12:33 ` Mickaël Salaün
2022-02-07 2:31 ` Konstantin Meskhidze
2022-02-07 16:00 ` Willem de Bruijn
2022-02-07 16:17 ` Willem de Bruijn
2022-02-10 2:05 ` Konstantin Meskhidze
2022-02-10 2:04 ` Konstantin Meskhidze
2022-02-01 12:28 ` Mickaël Salaün
2022-02-07 2:35 ` Konstantin Meskhidze
2022-02-01 12:13 ` Mickaël Salaün
2022-02-07 13:09 ` Konstantin Meskhidze
2022-02-07 14:17 ` Mickaël Salaün
2022-02-08 7:55 ` Konstantin Meskhidze
2022-02-08 12:09 ` Mickaël Salaün
2022-02-09 3:06 ` Konstantin Meskhidze
2022-01-24 8:02 ` [RFC PATCH 2/2] landlock: selftests for bind and connect hooks Konstantin Meskhidze
2022-02-01 18:31 ` Mickaël Salaün
2022-02-07 7:11 ` Konstantin Meskhidze
2022-02-07 12:49 ` Mickaël Salaün
2022-02-08 3:01 ` Konstantin Meskhidze
2022-02-08 12:17 ` Mickaël Salaün
2022-02-09 3:03 ` Konstantin Meskhidze
2022-02-10 10:16 ` Mickaël Salaün
2022-02-24 3:18 ` Konstantin Meskhidze
2022-02-24 9:55 ` Mickaël Salaün [this message]
2022-02-24 12:03 ` Konstantin Meskhidze
2022-02-24 14:15 ` Mickaël Salaün
2022-02-25 2:44 ` Konstantin Meskhidze
2022-02-01 17:53 ` [RFC PATCH 0/2] landlock network implementation cover letter Mickaël Salaün
2022-02-07 13:18 ` Konstantin Meskhidze
2022-02-07 13:35 ` Mickaël Salaün
2022-02-08 3:53 ` Konstantin Meskhidze
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