[PATCH v5 2/4] selftests/landlock: Selftests for file truncation support

[Mickaël Salaün]

FYI, my -next branch is here: 
https://git.kernel.org/pub/scm/linux/kernel/git/mic/linux.git/log/?h=next

Günther, let me know if everything is OK.

Konstantin, please rebase your work on it. It should mainly conflict 
with changes related to the Landlock ABI version.


On 19/08/2022 10:15, Mickaël Salaün wrote:
> Ok, it should be in -next soon. Thanks for your contribution!
> 
> Would you like to write a syzkaller test to cover this new access right?
> You only need to update the landlock_fs_accesses file with a call to
> truncate() returning EACCES and check that it covers
> hook_path_truncate(). You can take inspiration from this PR:
> https://github.com/google/syzkaller/pull/3133
> Please CC me, I can help.
> 
> Regards,
>    Mickaël
> 
> 
> On 19/08/2022 07:24, Günther Noack wrote:
>> On Thu, Aug 18, 2022 at 10:39:27PM +0200, Mickaël Salaün wrote:
>>> On 17/08/2022 22:30, Günther Noack wrote:
>>>> +/*
>>>> + * Invokes creat(2) and returns its errno or 0.
>>>> + * Closes the opened file descriptor on success.
>>>> + */
>>>> +static int test_creat(const char *const path, mode_t mode)
>>>
>>> This "mode" argument is always 0600. If it's OK with you, I hard code this
>>> mode and push this series to -next with some small cosmetic fixes.
>>
>> Yes, absolutely. Please do these fixes and push it to -next. :)
>>
>> Thanks,
>> —Günther
>>
>> --