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ksmbd: exempt FSCTL_PIPE_TRANSCEIVE from the generic file-id lookup

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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.

Signed-off-by: Gael Blivet <gael.blivet@gmail.com>
Assisted-by: Claude:claude-sonnet-5
Tested-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Gael Blivet 2026-07-31 13:54:20 +02:00 committed by Namjae Jeon
parent 29f74f0f2e
commit a3bcea7c81
1 changed files with 1 additions and 0 deletions
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1
fs/smb/server/smb2pdu.c
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@ -10132,6 +10132,7 @@ 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: