ath11k: fix memory OOB access in qmi_decode

The decoded_size is wrongly assigned in ath11k_qmi_msg_handlers and it results
in out of boundary access in qmi_decode. The correct decoded_size should be
calculated from the related ind_msg structure.

This issue is exposed with QCA6390 because it needs 11 small memory chunks
which are stored in qmi_wlanfw_request_mem_ind_msg_v01 and hence the
decoded_size exceeds the wrongly assigend decoded_size.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.1.0.1-01238-QCAHKSWPL_SILICONZ-2

Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1597389030-13887-9-git-send-email-kvalo@codeaurora.org

diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index b386ab4..529886b 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2477,21 +2477,21 @@ static const struct qmi_msg_handler ath11k_qmi_msg_handlers[] = {
                .type = QMI_INDICATION,
                .msg_id = QMI_WLFW_REQUEST_MEM_IND_V01,
                .ei = qmi_wlanfw_request_mem_ind_msg_v01_ei,
-               .decoded_size = sizeof(qmi_wlanfw_request_mem_ind_msg_v01_ei),
+               .decoded_size = sizeof(struct qmi_wlanfw_request_mem_ind_msg_v01),
                .fn = ath11k_qmi_msg_mem_request_cb,
        },
        {
                .type = QMI_INDICATION,
                .msg_id = QMI_WLFW_FW_MEM_READY_IND_V01,
                .ei = qmi_wlanfw_mem_ready_ind_msg_v01_ei,
-               .decoded_size = sizeof(qmi_wlanfw_mem_ready_ind_msg_v01_ei),
+               .decoded_size = sizeof(struct qmi_wlanfw_fw_mem_ready_ind_msg_v01),
                .fn = ath11k_qmi_msg_mem_ready_cb,
        },
        {
                .type = QMI_INDICATION,
                .msg_id = QMI_WLFW_FW_READY_IND_V01,
                .ei = qmi_wlanfw_fw_ready_ind_msg_v01_ei,
-               .decoded_size = sizeof(qmi_wlanfw_fw_ready_ind_msg_v01_ei),
+               .decoded_size = sizeof(struct qmi_wlanfw_fw_ready_ind_msg_v01),
                .fn = ath11k_qmi_msg_fw_ready_cb,
        },
        {
@@ -2499,7 +2499,7 @@ static const struct qmi_msg_handler ath11k_qmi_msg_handlers[] = {
                .msg_id = QMI_WLFW_COLD_BOOT_CAL_DONE_IND_V01,
                .ei = qmi_wlanfw_cold_boot_cal_done_ind_msg_v01_ei,
                .decoded_size =
-                       sizeof(qmi_wlanfw_cold_boot_cal_done_ind_msg_v01_ei),
+                       sizeof(struct qmi_wlanfw_fw_cold_cal_done_ind_msg_v01),
                .fn = ath11k_qmi_msg_cold_boot_cal_done_cb,
        },
 };

diff --git a/drivers/net/wireless/ath/ath11k/qmi.h b/drivers/net/wireless/ath/ath11k/qmi.h
index d55ce6c..60e9046 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/qmi.h
+++ b/drivers/net/wireless/ath/ath11k/qmi.h
@@ -267,6 +267,14 @@ struct qmi_wlanfw_fw_mem_ready_ind_msg_v01 {
        char placeholder;
 };
 
+struct qmi_wlanfw_fw_ready_ind_msg_v01 {
+       char placeholder;
+};
+
+struct qmi_wlanfw_fw_cold_cal_done_ind_msg_v01 {
+       char placeholder;
+};
+
 #define QMI_WLANFW_CAP_REQ_MSG_V01_MAX_LEN     0
 #define QMI_WLANFW_CAP_RESP_MSG_V01_MAX_LEN    207
 #define QMI_WLANFW_CAP_REQ_V01                 0x0024