Comment 45 for bug 236830

I'm still experiencing this issue. Ubuntu hardy, patched up to date as of this writing.

pjs11@patslinux01 ~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 8.04.3 LTS
Release: 8.04
Codename: hardy

pjs11@patslinux01 ~ $ uname -a
Linux patslinux01.mayo.edu 2.6.24-23-generic #1 SMP Wed Apr 1 21:43:24 UTC 2009 x86_64 GNU/Linux

pjs11@patslinux01 ~ $ klist
Credentials cache: FILE:/tmp/krb5cc_1000
        Principal: <email address hidden>

  Issued Expires Principal
Sep 3 14:48:04 Sep 4 00:48:04 <email address hidden>
Sep 3 14:48:09 Sep 4 00:48:04 rchnas06n2$@MFAD.MFROOT.ORG

# SMB Client connects using kerberos credentials

pjs11@patslinux01 ~ $ smbclient -k //rchnas06n2/Users500M
OS=[Windows 5.0] Server=[Windows 2000 LAN Manager]
smb: \>
pjs11@patslinux01 ~ $

# mount.cifs does not, and prompts for a password:

pjs11@patslinux01 ~ $ mount.cifs //rchnas06n2/Users500M/PJS11 mnt/pjs11 -o sec=krb5 --verbose
parsing options: sec=krb5
Password: (simply pressed return, here)

mount.cifs kernel mount options unc=//rchnas06n2\Users500M,ip=129.176.156.20,user=pjs11,pass=,ver=1,sec=krb5,uid=1000,gid=1000,prefixpath=PJS11
mount error 5 = Input/output error
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)

pjs11@patslinux01 ~ $ more /etc/request-key.conf
(...snip copious comments)
#OP TYPE DESCRIPTION CALLOUT INFO PROGRAM ARG1 ARG2 ARG3 ...
#====== ======= =============== =============== ===============================
create user debug:* negate /bin/keyctl negate %k 30 %S
create user debug:loop:* * |/bin/cat
create user debug:* * /usr/share/keyutils/request-key-debug.sh %k %d %c %S
#create cifs.spnego * * /usr/sbin/cifs.upcall -c %k %d
create cifs.spnego * * /usr/sbin/cifs.upcall %k %d
negate * * * /bin/keyctl negate %k 30 %S

Do the 64 bit packages have the necessary patches in them?
-- Pat