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Hello, For a key exchange algorithm I'm working on, I would like to keep a little bit of shared state between the main server process and the processes that clients connect to. So far, I'm considering mmap for the purpose. But I cannot figure out where I need to put the mmap initialization call, where it would be called at server startup (before any fork()s/exec()s), and never again.

Dear all, I am currently implementing an experimental key exchange (KEX) algorithm. Unlike current algorithms like DH, mine needs to be able to fail gracefully, and in case of failure, continue with whatever algorithm would have been negotiated if mine was not selected. My strategy for graceful failure is to remove my KEX algorithm from myproposal[KEX_DEFAULT_KEX] and to initiate a new key

Hello, This bug exists in 5.0p1. I apologize that I couldn't test against HEAD. I _believe_ I have found a race condition in sshd. In the v2 protocol, after a connection, the accepting process forks in privsep_preauth(). The parent executes monitor_child_preauth() to allow certain privsep requests necessary for authentication. The unprivileged child runs do_ssh2_kex() followed by