098b6f8e8a
directories which aren't under the recipient's root. Clean up of many error conditions involving descriptor passing, to eliminate infinite loops, panics, premature garbage collection of sockets, and descriptor leaks: - Avoid letting unp_gc() see descriptors with a refcount of zero by removing them from the socket's queue before releasing them. - Avoid socket leak in PRU_ABORT (this will also gc descriptors queued on a not-yet accepted socket when the accepting socket goes away). - Put in block comment explaining how unp_gc() should work. - Correctly manage unp_defer count so we don't get stuck in an infinite loop with nothing to do. - Don't tie MARK and DEFER bits so closely together. - Mark descriptors queued on not-yet-accepted sockets as well. - Don't call sorflush on non-socket, it doesn't work very well. - Deal with discard of NULL file pointer. - Hopefully cause GC to converge faster by only deferring sockets in unp_mark().