Inside ath9k_hif_usb_firmware_fail(), the instance of 'struct struct hif_device_usb' may be freed by ath9k_hif_usb_disconnect() after
complete(&hif_dev->fw_done); But 'hif_dev' is still accessed after the line code above is executed. This patch fixes the issue by not accessing 'hif_dev' after 'complete(&hif_dev->fw_done)' inside ath9k_hif_usb_firmware_fail(). Cc: ath9k-devel@lists.ath9k.org Cc: "Luis R. Rodriguez" <mcg...@qca.qualcomm.com> Cc: Jouni Malinen <jo...@qca.qualcomm.com> Cc: Vasanthakumar Thiagarajan <vthia...@qca.qualcomm.com> Cc: Senthil Balasubramanian <senth...@qca.qualcomm.com> Cc: "John W. Linville" <linvi...@tuxdriver.com> Signed-off-by: Ming Lei <ming....@canonical.com> --- drivers/net/wireless/ath/ath9k/hif_usb.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index ee6e50a..924c461 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -1072,14 +1072,15 @@ static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) */ static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) { - struct device *parent = hif_dev->udev->dev.parent; + struct device *dev = &hif_dev->udev->dev; + struct device *parent = dev->parent; complete(&hif_dev->fw_done); if (parent) device_lock(parent); - device_release_driver(&hif_dev->udev->dev); + device_release_driver(dev); if (parent) device_unlock(parent); -- 1.7.9.5 _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel