From caa575a86ec1f177730cafa089d69ab4e424860c Mon Sep 17 00:00:00 2001 From: Robert Dolca Date: Thu, 22 Oct 2015 12:11:40 +0300 Subject: [PATCH] NFC: nci: fix possible crash in nci_core_conn_create If the number of destination speific parameters supplied is 0 the call will fail. If the first destination specific parameter does not have a value, curr_id will be set to 0. Signed-off-by: Robert Dolca Signed-off-by: Samuel Ortiz --- net/nfc/nci/core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c index f66a5da85ddb..9d5f7a2b1d03 100644 --- a/net/nfc/nci/core.c +++ b/net/nfc/nci/core.c @@ -602,12 +602,19 @@ int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, if (!cmd) return -ENOMEM; + if (!number_destination_params) + return -EINVAL; + cmd->destination_type = destination_type; cmd->number_destination_params = number_destination_params; memcpy(cmd->params, params, params_len); data.cmd = cmd; - ndev->cur_id = params->value[DEST_SPEC_PARAMS_ID_INDEX]; + + if (params->length > 0) + ndev->cur_id = params->value[DEST_SPEC_PARAMS_ID_INDEX]; + else + ndev->cur_id = 0; r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data, -- 2.20.1