Old user can't log in

[John Almberg]

Just ran into a strange problem... I have a long-standing user  
account on my FreeBSD box that no longer works. She can't ssh into  
the box, and I can't even su to her account.

$ su jessica
Password:
su: setusercontext: Invalid argument

Doing some googling, I did find people with similar problems, but I  
guess I don't understand the solutions :-)

Someone suggested doing the following:

# ktrace -di su jessica
# kdump -f ktrace.out

This produces tons of output... the last few lines contain the  
following:

  59929 su       NAMI  "/etc/nsswitch.conf"
  59929 su       RET   stat 0
  59929 su       CALL  setgroups(0x11,0x7fffffffe5d0)
  59929 su       RET   setgroups -1 errno 22 Invalid argument
  59929 su       CALL  gettimeofday(0x7fffffffd810,0)
  59929 su       RET   gettimeofday 0
  59929 su       CALL  socket(0x1,0x2,0)
  59929 su       RET   socket 3
  59929 su       CALL  fcntl(0x3,0x2,0x1)
  59929 su       RET   fcntl 0
  59929 su       CALL  connect(0x3,0x7fffffffd7b0,0x6a)
  59929 su       NAMI  "/var/run/logpriv"
  59929 su       RET   connect 0
  59929 su       CALL  sendto(0x3,0x7fffffffdd10,0x42,0,0,0)
  59929 su       GIO   fd 3 wrote 66 bytes
        "<35>Feb 12 17:59:14 su: initgroups(jessica,1022): Invalid  
argument"

I guess this is a clue, but I have no idea what to do with it.

All other users that I've tried work, so the problem seems to be tied  
to something in this particular user's account.

The /etc/passwd and /etc/group files look fine.

Any suggestions, much appreciated.

-- John