Merge tag 'devicetree-fixes-for-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel...

Pull Devicetree fixes from Rob Herring:

 - Add validation of NUMA distance map to prevent crashes with bad map

 - Fix setting of dma_mask

* tag 'devicetree-fixes-for-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of, numa: Validate some distance map rules
  of/device: Really only set bus DMA mask when appropriate

diff --git a/drivers/of/device.c b/drivers/of/device.c
index 0f27fad..5592437 100644 (file)
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -149,9 +149,11 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
         * set by the driver.
         */
        mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1);
-       dev->bus_dma_mask = mask;
        dev->coherent_dma_mask &= mask;
        *dev->dma_mask &= mask;
+       /* ...but only set bus mask if we found valid dma-ranges earlier */
+       if (!ret)
+               dev->bus_dma_mask = mask;
 
        coherent = of_dma_is_coherent(np);
        dev_dbg(dev, "device is%sdma coherent\n",

diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index 35c64a4..fe6b136 100644 (file)
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -104,9 +104,14 @@ static int __init of_numa_parse_distance_map_v1(struct device_node *map)
                distance = of_read_number(matrix, 1);
                matrix++;
 
+               if ((nodea == nodeb && distance != LOCAL_DISTANCE) ||
+                   (nodea != nodeb && distance <= LOCAL_DISTANCE)) {
+                       pr_err("Invalid distance[node%d -> node%d] = %d\n",
+                              nodea, nodeb, distance);
+                       return -EINVAL;
+               }
+
                numa_set_distance(nodea, nodeb, distance);
-               pr_debug("distance[node%d -> node%d] = %d\n",
-                        nodea, nodeb, distance);
 
                /* Set default distance of node B->A same as A->B */
                if (nodeb > nodea)