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

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
---
 fs/smb/server/smb2pdu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 4bde5ab..8d6f42b 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -10133,6 +10133,7 @@ int smb2_ioctl(struct ksmbd_work *work)
 	case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
 	case FSCTL_VALIDATE_NEGOTIATE_INFO:
 	case FSCTL_PIPE_WAIT:
+	case FSCTL_PIPE_TRANSCEIVE:
 		no_fileid_ioctl = true;
 		break;
 	default:
-- 
2.43.0