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ksmbd: set STATUS_INVALID_PARAMETER error status if credit charge is invalid

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MS-SMB2 specification describe :
 If the calculated credit number is greater than the CreditCharge,
 the server MUST fail the request with the error code
 STATUS_INVALID_PARAMETER.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2021-07-16 14:52:46 +09:00
parent 58090b1752
commit 67307023d0
2 changed files with 17 additions and 12 deletions
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20
fs/ksmbd/server.c
View file

@ -101,8 +101,8 @@ static inline int check_conn_state(struct ksmbd_work *work)
return 0;
}
#define TCP_HANDLER_CONTINUE 0
#define TCP_HANDLER_ABORT 1
#define SERVER_HANDLER_CONTINUE 0
#define SERVER_HANDLER_ABORT 1
static int __process_request(struct ksmbd_work *work, struct ksmbd_conn *conn,
u16 *cmd)
@ -112,10 +112,10 @@ static int __process_request(struct ksmbd_work *work, struct ksmbd_conn *conn,
int ret;
if (check_conn_state(work))
return TCP_HANDLER_CONTINUE;
return SERVER_HANDLER_CONTINUE;
if (ksmbd_verify_smb_message(work))
return TCP_HANDLER_ABORT;
return SERVER_HANDLER_ABORT;
command = conn->ops->get_cmd_val(work);
*cmd = command;
@ -123,21 +123,21 @@ static int __process_request(struct ksmbd_work *work, struct ksmbd_conn *conn,
andx_again:
if (command >= conn->max_cmds) {
conn->ops->set_rsp_status(work, STATUS_INVALID_PARAMETER);
return TCP_HANDLER_CONTINUE;
return SERVER_HANDLER_CONTINUE;
}
cmds = &conn->cmds[command];
if (!cmds->proc) {
ksmbd_debug(SMB, "*** not implemented yet cmd = %x\n", command);
conn->ops->set_rsp_status(work, STATUS_NOT_IMPLEMENTED);
return TCP_HANDLER_CONTINUE;
return SERVER_HANDLER_CONTINUE;
}
if (work->sess && conn->ops->is_sign_req(work, command)) {
ret = conn->ops->check_sign_req(work);
if (!ret) {
conn->ops->set_rsp_status(work, STATUS_ACCESS_DENIED);
return TCP_HANDLER_CONTINUE;
return SERVER_HANDLER_CONTINUE;
}
}
@ -153,8 +153,8 @@ static int __process_request(struct ksmbd_work *work, struct ksmbd_conn *conn,
}
if (work->send_no_response)
return TCP_HANDLER_ABORT;
return TCP_HANDLER_CONTINUE;
return SERVER_HANDLER_ABORT;
return SERVER_HANDLER_CONTINUE;
}
static void __handle_ksmbd_work(struct ksmbd_work *work,
@ -203,7 +203,7 @@ static void __handle_ksmbd_work(struct ksmbd_work *work,
do {
rc = __process_request(work, conn, &command);
if (rc == TCP_HANDLER_ABORT)
if (rc == SERVER_HANDLER_ABORT)
break;
/*

9
fs/ksmbd/smb2misc.c
View file

@ -423,8 +423,13 @@ int ksmbd_smb2_check_message(struct ksmbd_work *work)
return 1;
}
return work->conn->vals->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU ?
smb2_validate_credit_charge(hdr) : 0;
if ((work->conn->vals->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU) &&
smb2_validate_credit_charge(hdr)) {
work->conn->ops->set_rsp_status(work, STATUS_INVALID_PARAMETER);
return 1;
}
return 0;
}
int smb2_negotiate_request(struct ksmbd_work *work)