Re: BUG #5121: Segmentation Fault when using pam w/ krb5

Well, we certainly are not going to break pq_recvbuf in such a
fundamental way as that ;-).  I think that the more likely place
to work around this is going to be in pam_passwd_conv_proc() in
src/backend/libpq/auth.c.  In particular, I see that when it gets
a NULL from recv_password_packet (which is what's going to happen
when pq_recvbuf returns EOF), it returns PAM_CONV_ERR without
bothering to set *resp.  I wonder whether we need to be initializing
*resp to NULL, or even making it really valid?

            regards, tom lane