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Description of problem:
Attempting to mount a share from an EMC Celerra using kerberos authentication
with hmac_md5 fails at our site. Sniffing on the network shows that the
NAS returns RPC_NT_INVALID_BINDING even though tickets could successfully
be obtained by cifs.upcall. Password-based authentication works when
'sec=krb5' is removed from the mount options.
It seems that the bug that we are running into is this recently discovered
problem in cifs-utils:
http://www.mail-archive.com/linux-cifs@vger.kernel.org/msg02167.html
Could you please apply these patches to the cifs-utils of RHEL6?
Version-Release number of selected component (if applicable):
RHEL6 workstation, up2date.
How reproducible:
Configure krb5.conf to only use hmac_md5 (or use an 2008R2 AD server without
backward compatibility for weak crypto).
Steps to Reproduce:
1. Get a ticket as the user used for authentication (someuser)
2. Run mount.cifs as root with arguments like this:
mount.cifs -o user=someuser,uid=33333,gid=33333,sec=krb5 //server/share /mnt
Actual results:
mount error(5): Input/output error
Expected results:
Should mount the share.