When I upgraded from 5.9.8.1 to 5.9.9 I am getting Segmentation fault when using su - username logged in as root. I can do as root: su userid without errors, also I can do su - userid form other users without errors. Lookus like a bug to me...
I've fixed a lot of potential segfaults (including some we saw happen) in the pam_xauth module that is included in pam-0.66-14 and I'm not able to reproduce this, so I will assume that this is fixed. If this was happening in X, then I probably fixed it; if it was happening from the console, then I almost assuredly fixed it. If you can reproduce this bug with pam-0.66-14 or later, please reopen this bug with the version of pam you are using, the version of sh-utils, and the output of the env command before running the su - username Thanks!
Where do I find pam-0.66-14... It is not part of 5.9.9
There were two bugs, one hiding the other. The one was fixed in 0.66-14, the other in 0.66-15.