Commit 73f949ea authored by Namjae Jeon's avatar Namjae Jeon Committed by Steve French
Browse files

ksmbd: check iov vector index in ksmbd_conn_write() 



If ->iov_idx is zero, This means that the iov vector for the response
was not added during the request process. In other words, it means that
there is a problem in generating a response, So this patch return as
an error to avoid NULL pointer dereferencing problem.

Signed-off-by: default avatarNamjae Jeon <linkinjeon@kernel.org>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent f2f11fca

fs/smb/server/connection.c

+3 −0
Original line number Diff line number Diff line
@@ -197,6 +197,9 @@ int ksmbd_conn_write(struct ksmbd_work *work) 
	if (work->send_no_response)

		return 0;



	if (!work->iov_idx)

		return -EINVAL;



	ksmbd_conn_lock(conn);

	sent = conn->transport->ops->writev(conn->transport, work->iov,

			work->iov_cnt,