[Bug 479272] [NEW] Bug in NetApp Filer SMB protocol implementation make CIFS share unmountable from Ubuntu

[Etienne Goyer]

Public bug reported:

Reportedly, a bug in NetApp Filer SMB protocol implementation make it
impossible to mount a CIFS share on such a server from Ubuntu using
mount.cifs and the cifs kernel module when using Kerberos
authentication.  The problem is being discussed in upstream Samba bug
tracker at:

    https://bugzilla.samba.org/show_bug.cgi?id=6682


The bug is triggered by trying to mount the CIFS share using a command such as:

    mount.cifs //netappfiler/share /mnt -o sec=krb5i


Note that using sec=krb5 does not work either.  When using NTLM authentication (by not specifying a sec=... mount option), the mount works as expected.

This have been confirmed in jaunty so far on kernel 2.6.28-15-generic.
We are in the process of testing on karmic, and on jaunty using mainline
kernel.

We have logs, but the content are somewhat sensitive and would take
great effort to sanitize.  The important bit is that we have exactly the
same error in dmesg as the snippet that is posted in the upstream Samba
bug report linked above (dialect:2; negprot rc -5).  If you need
anything specific in term of log, please ask and I will get it for you.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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Bug in NetApp Filer SMB protocol implementation make CIFS share unmountable from Ubuntu
https://bugs.launchpad.net/bugs/479272
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