powerpc: kmalloc failure ignored in vio_build_iommu_table()

PATCH New Roel Kluin 1 participant 1 message Sep 9, 2009 PowerPC

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Roel Kluin

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2009-09-09 15:03 UTC #0 lore raw

PATCH 1/1 powerpc: kmalloc failure ignored in vio_build_iommu_table()

Prevent NULL dereference if kmalloc() fails.

Signed-off-by Roel Kluin <[email protected]>

---
Found with sed: http://kernelnewbies.org/roelkluin

arch/powerpc/kernel/vio.c +2 -0

index 819e59f..1f5266f 100644
@@ -1054,6 +1054,8 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
 		return NULL;
 
 	tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
+	if (tbl == NULL)
+		return NULL;
 
 	of_parse_dma_window(dev->dev.archdata.of_node, dma_window,
 			    &tbl->it_index, &offset, &size);