scsi: qedf: Fix NULL dereference in error handling

[ Upstream commit f025312b089474a54e4859f3453771314d9e3d4f ]

Smatch reported:

drivers/scsi/qedf/qedf_main.c:3056 qedf_alloc_global_queues()
warn: missing unwind goto?

At this point in the function, nothing has been allocated so we can return
directly. In particular the "qedf->global_queues" have not been allocated
so calling qedf_free_global_queues() will lead to a NULL dereference when
we check if (!gl[i]) and "gl" is NULL.

Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Jinhong Zhu <jinhongzhu@hust.edu.cn>
Link: https://lore.kernel.org/r/20230502140022.2852-1-jinhongzhu@hust.edu.cn
Reviewed-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c
index e045c6e..ecff2ec 100644 (file)
--- a/drivers/scsi/qedf/qedf_main.c
+++ b/drivers/scsi/qedf/qedf_main.c
@@ -3046,9 +3046,8 @@ static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
         * addresses of our queues
         */
        if (!qedf->p_cpuq) {
-               status = -EINVAL;
                QEDF_ERR(&qedf->dbg_ctx, "p_cpuq is NULL.\n");
-               goto mem_alloc_failure;
+               return -EINVAL;
        }
 
        qedf->global_queues = kzalloc((sizeof(struct global_queue *)