Re: [kernel-hardening] [PATCH net-next v6 06/11] seccomp,landlock: Handle Landlock events per process hierarchy

[MickaÃl SalaÃn]

On 29/03/2017 12:35, Djalal Harouni wrote:
> On Wed, Mar 29, 2017 at 1:46 AM, MickaÃl SalaÃn <mic@xxxxxxxxxxx> wrote:

>> @@ -25,6 +30,9 @@ struct seccomp_filter;
>>  struct seccomp {
>>         int mode;
>>         struct seccomp_filter *filter;
>> +#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_SECURITY_LANDLOCK)
>> +       struct landlock_events *landlock_events;
>> +#endif /* CONFIG_SECCOMP_FILTER && CONFIG_SECURITY_LANDLOCK */
>>  };
> 
> Sorry if this was discussed before, but since this is mean to be a
> stackable LSM, I'm wondering if later you could move the events from
> seccomp, and go with a security_task_alloc() model [1] ?
> 
> Thanks!
> 
> [1] http://kernsec.org/pipermail/linux-security-module-archive/2017-March/000184.html
> 

Landlock use the seccomp syscall to attach a rule to a process and using
struct seccomp to store this rule make sense. There is currently no way
to store multiple task->security, which is needed for a stackable LSM
like Landlock, but we could move the events there if needed in the future.

 MickaÃl

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