firmware: arm_scmi: Use after free in scmi_create_protocol_device()

We need to return here instead of setting up the freed sdev device as a
transport.

Fixes: 907b6d14911d ("firmware: arm_scmi: add per-protocol channels support using idr objects")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 14b1471..2455be8 100644 (file)
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -778,6 +778,7 @@ scmi_create_protocol_device(struct device_node *np, struct scmi_info *info,
        if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id)) {
                dev_err(&sdev->dev, "failed to setup transport\n");
                scmi_device_destroy(sdev);
+               return;
        }
 
        /* setup handle now as the transport is ready */