nvme-core: fix memory leak in dhchap_ctrl_secret

Free dhchap_secret in nvme_ctrl_dhchap_ctrl_secret_store() before we
return when nvme_auth_generate_key() returns error.

Fixes: f50fff73d620 ("nvme: implement In-Band authentication")
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index a529fdd..49800d6 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3882,8 +3882,10 @@ static ssize_t nvme_ctrl_dhchap_ctrl_secret_store(struct device *dev,
                int ret;
 
                ret = nvme_auth_generate_key(dhchap_secret, &key);
-               if (ret)
+               if (ret) {
+                       kfree(dhchap_secret);
                        return ret;
+               }
                kfree(opts->dhchap_ctrl_secret);
                opts->dhchap_ctrl_secret = dhchap_secret;
                ctrl_key = ctrl->ctrl_key;
@@ -3891,7 +3893,8 @@ static ssize_t nvme_ctrl_dhchap_ctrl_secret_store(struct device *dev,
                ctrl->ctrl_key = key;
                mutex_unlock(&ctrl->dhchap_auth_mutex);
                nvme_auth_free_key(ctrl_key);
-       }
+       } else
+               kfree(dhchap_secret);
        /* Start re-authentication */
        dev_info(ctrl->device, "re-authenticating controller\n");
        queue_work(nvme_wq, &ctrl->dhchap_auth_work);