RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF

commit 5363fc4 upstream.

ib_dealloc_device() should be called only after device cleanup.  Fix the
dealloc sequence.

Fixes: 6d75814 ("RDMA/bnxt_re: Use auxiliary driver interface")
Link: https://lore.kernel.org/r/1691642677-21369-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/infiniband/hw/bnxt_re/main.c

@@ -1425,8 +1425,8 @@ static void bnxt_re_remove(struct auxiliary_device *adev)
 	}
 	bnxt_re_setup_cc(rdev, false);
 	ib_unregister_device(&rdev->ibdev);
-	ib_dealloc_device(&rdev->ibdev);
 	bnxt_re_dev_uninit(rdev);
+	ib_dealloc_device(&rdev->ibdev);
 skip_remove:
 	mutex_unlock(&bnxt_re_mutex);
 }