Refactoring of medusa model #804
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…me changes in kernel configuration
This caused warnings in objtool, since frame pointers were not pushed onto the stack. It also caused BUGs in stack frame unwinder, since the frame pointers were missing.
The ipc_associate access handler returned value immediately from one code path, without re-locking an IPC object unlocked running this handler.
If an authorisation server is connected, the kobj related to a process can be validated immediately in medusa_l1_task_alloc(); there is no reason wait for validation to first access decision.
1) Remove unsupported LSM hooks from sources. 2) Comment out unused LSM hooks. 3) During compilaton process print warnings for those Medusa LSM hoooks, which have to be revisited / rewrited / checked ... For this purposes these functions are disconnected from kernel IPC hooks, which is done via medusa_l1_hooks table - medusa hook functions are removed from corresponding kernel LSM elements in this table. But medusa hooks are defined in source code, which leads during compilation process to warning "defined but not used" [-Wunused-function].
Change following acctypes (IPC subsystem) from TRIGGERED_AT_SUBJECT to
TRIGGERED_AT_OBJECT:
1) acctype ipc associate
2) acctype ipc_ctl
3) acctype ipc msgrcv
4) acctype ipc msgsnd
5) acctype ipc permission
6) acctype ipc semop
7) acctype ipc shhmat
1) It is not necessary split Medusa initialisation into two phases yet. 2) Hook medusa_l0_task_free() was called within an interrupt, and mutex_lock() in this function leaded to deadlock. 3) For future reuse, sources of Layer-0 are left in repository.
- remove redundant capabilities - remove unused bprm hooks
Remove capabilities hooks from l1/medusa.c
…t the severity to printed messages
Remove the killpriv capability + provide better message system
… in Linux Kernel Add unit tests for medusa model and vs_model.h Move vsmodel implementation into its own header file Refactoring of model.h -> med_model.h
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