Re: [PATCH V3 3/5 selinux-next] selinux: sidtab_clone switch to use rwlock.

[peter enderborg <peter.enderborg@sony.com>]

On 05/30/2018 11:22 PM, J Freyensee wrote:
>
>>   +int sidtab_clone(struct sidtab *s, struct sidtab *d)
>> +{
>> +    int i, rc = 0;
> If s or d are NULL (see if() below), why would we want rc, the return value, to be 0?  How about defaulting rc to an error value (-EINVAL)?
Oops! Thanks, will fix in next set.
>> +    struct sidtab_node *cur;
>> +
>> +    if (!s || !d)
>> +        goto errout;
>> +
>> +    read_lock(&s->lock);
>> +    for (i = 0; i < SIDTAB_SIZE; i++) {
>> +        cur = s->htable[i];
>> +        while (cur) {
>> +            if (cur->sid > SECINITSID_NUM)
>> +                rc =  sidtab_insert(d, cur->sid, &cur->context);
>> +            if (rc)
>> +                goto out;
>> +            cur = cur->next;
>> +        }
>> +    }
>> +out:
>> +    read_unlock(&s->lock);
>> +errout:
>> +    return rc;
>> +}
>>
> Thanks,
> Jay
>