The DIOCRADDTABLES and DIOCRDELTABLES ioctls can process a number of tables at a time, and as such try to allocate <number of tables> * sizeof(struct pfr_table). This multiplication can overflow. Thanks to mallocarray() this is not exploitable, but an overflow does panic the system. Arbitrarily limit this to 65535 tables. pfctl only ever processes one table at a time, so it presents no issues there. MFC after: 1 week |
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