From af705ef2b0ded0d8f54c238fdf3c17a1d47ad924 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Thu, 22 Sep 2022 23:36:34 +0900 Subject: [PATCH] ksmbd: fix encryption failure issue for session logoff response If client send encrypted session logoff request on seal mount, Encryption for that response fails. ksmbd: Could not get encryption key CIFS: VFS: cifs_put_smb_ses: Session Logoff failure rc=-512 Session lookup fails in ksmbd_get_encryption_key() because sess->state is set to SMB2_SESSION_EXPIRED in session logoff. There is no need to do session lookup again to encrypt the response. This patch change to use ksmbd_session in ksmbd_work. Signed-off-by: Namjae Jeon Signed-off-by: Steve French --- fs/ksmbd/auth.c | 12 ++++++++---- fs/ksmbd/auth.h | 3 ++- fs/ksmbd/smb2pdu.c | 7 +++---- 3 files changed, 13 insertions(+), 9 deletions(-) diff --git a/fs/ksmbd/auth.c b/fs/ksmbd/auth.c index c5a5c7b90d72..2330d7754cf6 100644 --- a/fs/ksmbd/auth.c +++ b/fs/ksmbd/auth.c @@ -984,13 +984,16 @@ out: return rc; } -static int ksmbd_get_encryption_key(struct ksmbd_conn *conn, __u64 ses_id, +static int ksmbd_get_encryption_key(struct ksmbd_work *work, __u64 ses_id, int enc, u8 *key) { struct ksmbd_session *sess; u8 *ses_enc_key; - sess = ksmbd_session_lookup_all(conn, ses_id); + if (enc) + sess = work->sess; + else + sess = ksmbd_session_lookup_all(work->conn, ses_id); if (!sess) return -EINVAL; @@ -1078,9 +1081,10 @@ static struct scatterlist *ksmbd_init_sg(struct kvec *iov, unsigned int nvec, return sg; } -int ksmbd_crypt_message(struct ksmbd_conn *conn, struct kvec *iov, +int ksmbd_crypt_message(struct ksmbd_work *work, struct kvec *iov, unsigned int nvec, int enc) { + struct ksmbd_conn *conn = work->conn; struct smb2_transform_hdr *tr_hdr = smb2_get_msg(iov[0].iov_base); unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; int rc; @@ -1094,7 +1098,7 @@ int ksmbd_crypt_message(struct ksmbd_conn *conn, struct kvec *iov, unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); struct ksmbd_crypto_ctx *ctx; - rc = ksmbd_get_encryption_key(conn, + rc = ksmbd_get_encryption_key(work, le64_to_cpu(tr_hdr->SessionId), enc, key); diff --git a/fs/ksmbd/auth.h b/fs/ksmbd/auth.h index 25b772653de0..362b6159a6cf 100644 --- a/fs/ksmbd/auth.h +++ b/fs/ksmbd/auth.h @@ -33,9 +33,10 @@ struct ksmbd_session; struct ksmbd_conn; +struct ksmbd_work; struct kvec; -int ksmbd_crypt_message(struct ksmbd_conn *conn, struct kvec *iov, +int ksmbd_crypt_message(struct ksmbd_work *work, struct kvec *iov, unsigned int nvec, int enc); void ksmbd_copy_gss_neg_header(void *buf); int ksmbd_auth_ntlmv2(struct ksmbd_conn *conn, struct ksmbd_session *sess, diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 6f48b6331bfc..649f9b72707a 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -8589,7 +8589,7 @@ int smb3_encrypt_resp(struct ksmbd_work *work) buf_size += iov[1].iov_len; work->resp_hdr_sz = iov[1].iov_len; - rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1); + rc = ksmbd_crypt_message(work, iov, rq_nvec, 1); if (rc) return rc; @@ -8608,7 +8608,6 @@ bool smb3_is_transform_hdr(void *buf) int smb3_decrypt_req(struct ksmbd_work *work) { - struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess; char *buf = work->request_buf; unsigned int pdu_length = get_rfc1002_len(buf); @@ -8628,7 +8627,7 @@ int smb3_decrypt_req(struct ksmbd_work *work) return -ECONNABORTED; } - sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId)); + sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); if (!sess) { pr_err("invalid session id(%llx) in transform header\n", le64_to_cpu(tr_hdr->SessionId)); @@ -8639,7 +8638,7 @@ int smb3_decrypt_req(struct ksmbd_work *work) iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; iov[1].iov_len = buf_data_size; - rc = ksmbd_crypt_message(conn, iov, 2, 0); + rc = ksmbd_crypt_message(work, iov, 2, 0); if (rc) return rc;