Re: [PATCH] ksmbd: exempt FSCTL_PIPE_TRANSCEIVE from the generic file-id lookup

On Fri, Jul 31, 2026 at 8:56=E2=80=AFPM Ga=C3=ABl Blivet-Bailly
<[email protected]> wrote:
>
> From: Gael Blivet <[email protected]>
>
> smb2_ioctl() rejects FSCTL_PIPE_TRANSCEIVE with
> STATUS_OBJECT_NAME_NOT_FOUND before fsctl_pipe_transceive() runs. RPC
> pipe IDs live in sess->rpc_handle_list, a separate namespace from the
> ksmbd_file table the generic ksmbd_lookup_fd_slow() gate searches, so
> the lookup always misses.
>
> Found while testing generic SMB browsing (Finder's "Connect to
> Server"): every DCE/RPC bind over a named pipe (SRVSVC, WKSSVC, SAMR,
> LSARPC) failed right after CREATE. Adding FSCTL_PIPE_TRANSCEIVE to the
> same no_fileid_ioctl exemption as FSCTL_PIPE_WAIT fixes it, confirmed
> by testing a build with and without the change.
>
> Fixes: 0726814421c2 ("ksmbd: add SMB3 request replay support")
> Signed-off-by: Gael Blivet <[email protected]>
> Assisted-by: Claude:claude-sonnet-5
Applied it to #ksmbd-for-next-next with ChenXiaoSong's reviewed/tested-by t=
ags.