powerpc: kmalloc failure ignored in vio_build_iommu_table()

Prevent NULL dereference if kmalloc() fails. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
git-mirror · Sep 24, 2009 · 0f33727 · 0f33727
1 parent 254be49
commit 0f33727
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
@@ -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);