Messages in this thread | | | Subject | Re: [TOMOYO 05/15](repost) Domain transition handler functions. | From | Tetsuo Handa <> | Date | Wed, 3 Oct 2007 23:56:28 +0900 |
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Hello.
YOSHIFUJI Hideaki wrote: > It is not a good practice. Please free such objects. > BTW, how many objects do you have in the list? It varies from 0 to some thousands, depending on the policy supplied by the administrator and/or the policy appended by "learning mode".
Peter Zijlstra wrote: > sounds like a might fine memory leak / dos attack. TOMOYO Linux keeps the policy in CD-R's manner. Thus, once an entry is written, it's pointer is valid forever. TOMOYO Linux's simplicity (singly-linked list with no read_lock) comes from this "keep the policy in CD-R's manner". Yes, it is a kind of memory leak, but is controllable.
The kernel no longer requires memory after entering into "enforcing mode". So, attackers can't do DoS attack after entering into "enforcing mode".
Regards.
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