[cifs-protocol] SMB1 Trans2SetPathInfo() FileEndOfFileInformation is not enforcing share modes

Jeremy Allison jra at samba.org
Wed Nov 25 11:45:31 MST 2009

On Wed, Nov 25, 2009 at 05:14:26PM +0000, Bill Wesse wrote:
> Hello Tim. I think the difference in the response between the standard versus pass-through level lies in how the file handle is obtained during the call (given that TRANS2_SET_PATH_INFORMATION passes the path, and not the handle). The logical conclusion from the trace is that pass-through gets the existing handle, and the non pass-through value simply fails, because a new handle cannot be opened due to the lack of sharing.
> I will continue my investigation into the details on the differences between the base & pass-through handling, with respect to the file path / handle source. Pass-through is basically implementation dependent, as noted in [MS-FSCC] (reference below), so there is a possibility this may not be further elaborated on in the documents.

That won't wash I'm afraid. If it's visible on the wire, and it
changes the visible behaviour of the file server, then it needs
to get documented.


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