Re: [PATCH] CIFS: fix FSCTL_SET_REPARSE_POINT SMB2_ioctl() call

["Aurélien Aptel" <aaptel@suse.com>]

Steve French <smfrench@gmail.com> writes:
> Without this change the ioctl() fails with INVALID_PARAMETER.
> Since SET_REPARSE_POINT has no output, set the max output response
> size to zero.

Note that this is more of a work around, I didn't intend to send this
yet. I haven't tried to figure out which cases we were violating and
where was the underlying issue.

> If either InputCount, MaxInputResponse, or MaxOutputResponse is
> greater than Connection.MaxTransactSize, the server SHOULD<306> fail
> the request with STATUS_INVALID_PARAMETER.

possible

> The server MUST fail the request with STATUS_INVALID_PARAMETER in the following cases:
>
> * If InputOffset is greater than zero but less than (size of SMB2
>   header + size of the SMB2 IOCTL request not including Buffer) or
>   if InputOffset is greater than (size of SMB2 header + size of the
>   SMB2 IOCTL request).

input related, nope

> * If OutputOffset is greater than zero but less than (size of SMB2
>   header + size of the SMB2 IOCTL request not including Buffer) or if
>   OutputOffset is greater than (size of SMB2 header + size of the SMB2
>   IOCTL request).

doesn't involve MaxOutputResponse, nope

> * If (InputOffset + InputCount) is greater than (size of SMB2 header +
>   size of the SMB2 IOCTL request).

input related, nope

> * If (OutputOffset + OutputCount) is greater than (size of SMB2 header
>   + size of the SMB2 IOCTL request).

doesn't involve MaxOutputResponse, nope

> * If OutputCount is greater than zero and OutputOffset is less
>   than (InputOffset + InputCount).

doesn't involve MaxOutputResponse, nope

So it seems to me only possible explanation is the first, i.e.
MaxOutputResponse > Connection.MaxTransactSize, somehow.

-- 
Aurélien Aptel / SUSE Labs Samba Team
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