Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "Four small fixes for crashes:

   - Double free in rxe

   - UAF in irdma from early freeing the rf

   - Off by one undoing the IRQ allocations during error unwind in irdma

   - Another race with device rename and uevent generation. uevents
     accesses the struct device name and UAF when it is changed"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem
  ice, irdma: fix an off by one in error handling code
  irdma: free iwdev->rf after removing MSI-X
  RDMA/rxe: Fix slab-use-after-free Read in rxe_queue_cleanup bug

Author: torvalds

drivers/infiniband/core/device.c

@@ -1352,6 +1352,9 @@ static void ib_device_notify_register(struct ib_device *device)
 
 	down_read(&devices_rwsem);
 
+	/* Mark for userspace that device is ready */
+	kobject_uevent(&device->dev.kobj, KOBJ_ADD);
+
 	ret = rdma_nl_notify_event(device, 0, RDMA_REGISTER_EVENT);
 	if (ret)
 		goto out;
@@ -1468,10 +1471,9 @@ int ib_register_device(struct ib_device *device, const char *name,
 		return ret;
 	}
 	dev_set_uevent_suppress(&device->dev, false);
-	/* Mark for userspace that device is ready */
-	kobject_uevent(&device->dev.kobj, KOBJ_ADD);
 
 	ib_device_notify_register(device);
+
 	ib_device_put(device);
 
 	return 0;

drivers/infiniband/hw/irdma/main.c

@@ -221,7 +221,7 @@ static int irdma_init_interrupts(struct irdma_pci_f *rf, struct ice_pf *pf)
 			break;
 
 	if (i < IRDMA_MIN_MSIX) {
-		for (; i > 0; i--)
+		while (--i >= 0)
 			ice_free_rdma_qvector(pf, &rf->msix_entries[i]);
 
 		kfree(rf->msix_entries);
@@ -255,6 +255,8 @@ static void irdma_remove(struct auxiliary_device *aux_dev)
 	ice_rdma_update_vsi_filter(pf, iwdev->vsi_num, false);
 	irdma_deinit_interrupts(iwdev->rf, pf);
 
+	kfree(iwdev->rf);
+
 	pr_debug("INIT: Gen2 PF[%d] device remove success\n", PCI_FUNC(pf->pdev->devfn));
 }
 

drivers/infiniband/hw/irdma/verbs.c

@@ -4871,5 +4871,4 @@ void irdma_ib_dealloc_device(struct ib_device *ibdev)
 
 	irdma_rt_deinit_hw(iwdev);
 	irdma_ctrl_deinit_hw(iwdev->rf);
-	kfree(iwdev->rf);
 }

drivers/infiniband/sw/rxe/rxe_cq.c

@@ -56,11 +56,8 @@ int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
 
 	err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata,
 			   cq->queue->buf, cq->queue->buf_size, &cq->queue->ip);
-	if (err) {
-		vfree(cq->queue->buf);
-		kfree(cq->queue);
+	if (err)
 		return err;
-	}
 
 	cq->is_user = uresp;