Robert Watson 1aa37f5392 Improve locking of pipe mutexes in the context of MAC: ... (1) Where previously the pipe mutex was selectively grabbed during pipe_ioctl(), now always grab it and then release if if not needed. This protects the call to mac_check_pipe_ioctl() to make sure the label remains consistent. (Note: it looks like sigio locking may be incorrect for fgetown() since we call it not-by-reference and sigio locking assumes call by reference). (2) In pipe_stat(), lock the pipe if MAC is compiled in so that the call to mac_check_pipe_stat() gets a locked pipe to protect label consistency. We still release the lock before returning actual stat() data, risking inconsistency, but apparently our pipe locking model accepts that risk. (3) In various pipe MAC authorization checks, assert that the pipe lock is held. (4) Grab the lock when performing a pipe relabel operation, and assert it a little deeper in the stack. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories		2002-10-01 04:30:19 +00:00
..
lomac	- Use vrefcnt() instead of v_usecount.	2002-09-25 02:42:43 +00:00
mac	Improve locking of pipe mutexes in the context of MAC:	2002-10-01 04:30:19 +00:00
mac_biba	Remove another missed trailing space.	2002-09-21 19:50:28 +00:00
mac_bsdextended	Pass active_cred and file_cred into the MAC framework explicitly	2002-08-19 19:04:53 +00:00
mac_ifoff	Rename mac_check_socket_receive() to mac_check_socket_deliver() so that	2002-08-15 18:51:27 +00:00
mac_mls	Trim trailing whitespace from the ends of lines.	2002-09-21 19:26:59 +00:00
mac_none	Prefer NULL to 0 when passing a NULL pointer.	2002-08-20 02:54:09 +00:00
mac_seeotheruids	Introduce support for Mandatory Access Control and extensible	2002-07-31 18:07:45 +00:00
mac_stub	Prefer NULL to 0 when passing a NULL pointer.	2002-08-20 02:54:09 +00:00
mac_test	Provide stub mpo_syscall() implementations for mac_none and mac_test.	2002-08-20 02:53:35 +00:00