At least with this I can work out what your primary points are. The most important takeaway seems to be that OpenSSH sshd doesn't really use PAM unless you enable "ChallengeResponseAuth" config option, so if you want your custom PAM module to work with sshd, you need to turn that on.
Another important point you make is, on Ubuntu, you need to download the debug symbol packages for systems libraries if you want gdb to give you meaningful backtraces.
The suggestion of putting a breakpoint on dlsym also seems helpful.
This meme-laden presentation style, I seem totally incapable of consuming or producing it, and I don't really get it. I don't know if it is a generational thing or something.
Another important point you make is, on Ubuntu, you need to download the debug symbol packages for systems libraries if you want gdb to give you meaningful backtraces.
The suggestion of putting a breakpoint on dlsym also seems helpful.
This meme-laden presentation style, I seem totally incapable of consuming or producing it, and I don't really get it. I don't know if it is a generational thing or something.