https://bugzilla.mindrot.org/show_bug.cgi?id=3511
Bug ID: 3511 Summary: KbdInteractiveAuthentication and Golang goroutines scheduler Product: Portable OpenSSH Version: 9.1p1 Hardware: amd64 OS: Linux Status: NEW Severity: normal Priority: P5 Component: PAM support Assignee: unassigned-b...@mindrot.org Reporter: krasn...@gmail.com Hi! I don't know how to solve my problem and I don't know where the problem is, in OpenSSH or Golang runtime. I am writing a multi-factor PAM module in Golang. The module asks questions to the user and waits for answers from him. So to make the dialog work, I switch `KbdInteractiveAuthentication yes`. Everything works, but as soon as the golang goroutine is launched, the module freezes (stuck, hang). Hangs up so that no code in the module is running anymore. The description for `KbdInteractiveAuthentication` says `Change to yes to enable challenge-response passwords (beware issues with some PAM modules and threads)`. Can you describe how this option works, why does it break the golang goroutines scheduler? If this is a known issue and a problem in golang, then I will open a new issue on github, since mine (https://github.com/golang/go/issues/57394) was closed due to the fact that I could not explain the cause of the problem. If this is an OpenSSH issue, then I can provide the necessary logs and a minimal project to reproduce the issue. ps. Unfortunately, even if I write in one thread, the http package in golang itself launches goroutines and the module freezes. pss. I've tried rebuilding the OpenSSH server with the UNSUPPORTED_POSIX_THREADS_HACK declaration and then everything works as it should, but I can't ask all users to rebuild the OpenSSH server. And the description says there is no support for enabling this. Thank you for your attention! -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ openssh-bugs mailing list openssh-bugs@mindrot.org https://lists.mindrot.org/mailman/listinfo/openssh-bugs