netdev - Re: [PATCH v7 16/18] seltests/landlock: add invalid input data test

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Date:   Mon, 10 Oct 2022 12:37:24 +0200
From:   Mickaël Salaün <mic@...ikod.net>
To:     "Konstantin Meskhidze (A)" <konstantin.meskhidze@...wei.com>
Cc:     willemdebruijn.kernel@...il.com, gnoack3000@...il.com,
        linux-security-module@...r.kernel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, anton.sirazetdinov@...wei.com
Subject: Re: [PATCH v7 16/18] seltests/landlock: add invalid input data test


On 12/09/2022 19:22, Mickaël Salaün wrote:
> 
> On 10/09/2022 22:51, Konstantin Meskhidze (A) wrote:
>>
>>
>> 9/6/2022 11:09 AM, Mickaël Salaün пишет:
>>>
>>> On 29/08/2022 19:03, Konstantin Meskhidze wrote:
>>>> This patch adds rules with invalid user space supplied data:
>>>>        - out of range ruleset attribute;
>>>>        - unhandled allowed access;
>>>>        - zero port value;
>>>>        - zero access value;
>>>>
>>>> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@...wei.com>
>>>> ---
>>>>
>>>> Changes since v6:
>>>> * Adds invalid ruleset attribute test.
>>>>
>>>> Changes since v5:
>>>> * Formats code with clang-format-14.
>>>>
>>>> Changes since v4:
>>>> * Refactors code with self->port variable.
>>>>
>>>> Changes since v3:
>>>> * Adds inval test.
>>>>
>>>> ---
>>>>     tools/testing/selftests/landlock/net_test.c | 66 ++++++++++++++++++++-
>>>>     1 file changed, 65 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
>>>> index a93224d1521b..067ba45f58a5 100644
>>>> --- a/tools/testing/selftests/landlock/net_test.c
>>>> +++ b/tools/testing/selftests/landlock/net_test.c
>>>> @@ -26,9 +26,12 @@
>>>>
>>>>     #define IP_ADDRESS "127.0.0.1"
>>>>
>>>> -/* Number pending connections queue to be hold */
>>>> +/* Number pending connections queue to be hold. */
>>>
>>> Patch of a previous patch?
>>>
>>>
>>>>     #define BACKLOG 10
>>>>
>>>> +/* Invalid attribute, out of landlock network access range. */
>>>> +#define LANDLOCK_INVAL_ATTR 7
>>>> +
>>>>     FIXTURE(socket)
>>>>     {
>>>>     	uint port[MAX_SOCKET_NUM];
>>>> @@ -719,4 +722,65 @@ TEST_F(socket, ruleset_expanding)
>>>>     	/* Closes socket 1. */
>>>>     	ASSERT_EQ(0, close(sockfd_1));
>>>>     }
>>>> +
>>>> +TEST_F(socket, inval)
>>>> +{
>>>> +	struct landlock_ruleset_attr ruleset_attr = {
>>>> +		.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP
>>>> +	};
>>>> +	struct landlock_ruleset_attr ruleset_attr_inval = {
>>>> +		.handled_access_net = LANDLOCK_INVAL_ATTR
>>>
>>> Please add a test similar to TEST_F_FORK(layout1,
>>> file_and_dir_access_rights) instead of explicitly defining and only
>>> testing LANDLOCK_INVAL_ATTR.
>>>
>>      Do you want fs test to be in this commit or maybe its better to add
>> it into "[PATCH v7 01/18] landlock: rename access mask" one.

Just to make it clear, I didn't suggested an FS test, but a new network 
test similar to layout1.file_and_dir_access_rights but only related to 
the network. It should replace/extend the content of this patch (16/18).


> 
> You can squash all the new tests patches (except the "move helper
> function").
You should move most of your patch descriptions in a comment above the 
related tests. The commit message should list all the new tests and 
quickly explain which part of the kernel is covered (i.e. mostly the TCP 
part of Landlock). You can get some inspiration from 
https://git.kernel.org/mic/c/f4056b9266b571c63f30cda70c2d89f7b7e8bb7b

You need to rebase on top of my next branch (from today).