Building Hello World LSM

[Thomas F. J.-M. Pasquier]

No, other LSM. Checked in the config file. The only one selected is mine
and it is set "Default Security Module" when using menuconfig.

On Mon Jan 19 2015 at 12:07:33 AM Tian Dave <dave.jing.tian at gmail.com>
wrote:

> Then which LSM was triggered? SELinux? You probably need to disable other
> LSM before making your LSM work.
>
> Thanks,
> Dave
>
> 2015-01-18 18:49 GMT-05:00 Thomas F. J.-M. Pasquier <tfjmp2 at cam.ac.uk>:
>
>> Hi everyone,
>>
>> Kernel version 3.17.8
>>
>> I am trying to build a skeleton LSM module, but I am not having much luck
>> so far. The problem seems to be that the LSM init function is never called.
>>
>> I am selecting my helloworld LSM when building the kernel and it is set
>> as default (checked and re-checked in menuconfig + in the file).
>>
>> The build is going fine (my module is built as I would expect). The rest
>> of the building procedure goes fine. I reboot, the new image works just
>> fine except my LSM is not in (nor any other, it seems, for that matter).
>>
>> Here is the init function:
>> static __init int hw_init(void){
>> /* avoid security registration races */
>> if (!security_module_enable(&hw_ops)){
>> printk(KERN_INFO "hw:  Disabled at boot.\n");
>> return 0;
>> }
>>
>> printk(KERN_INFO "hw:  Initializing.\n");
>>
>> if (register_security(&hw_ops))
>> panic("hw: Unable to register with kernel.\n");
>> else
>> printk(KERN_INFO "hw: registered with the kernel.\n");
>>
>> return 0;
>> }
>>
>> security_initcall(hw_init);
>>
>> I looked at how it was done in SELinux and the other security module and
>> I don't seem to be doing things differently or incorrectly. I checked the
>> log level just in case and that's not the issue either.
>>
>> I am tempted to say the problem come from my building
>> procedure/configuration, rather than the module/code in itself (the dist on
>> top of the kernel is fedora21). I have been at it for a while now and any
>> help would be most welcomed.
>>
>> Thank you in advance.
>>
>> Regards,
>> Thomas
>>
>>
>>
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>>
>
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