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Commit 0f337274 authored by roel kluin's avatar roel kluin Committed by Benjamin Herrenschmidt
Browse files

powerpc: kmalloc failure ignored in vio_build_iommu_table() 



Prevent NULL dereference if kmalloc() fails.

Signed-off-by: default avatarRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 254be490

arch/powerpc/kernel/vio.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -1054,6 +1054,8 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev) 
		return NULL;

		return NULL;





	tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);

	tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);

	if (tbl == NULL)

		return NULL;





	of_parse_dma_window(dev->dev.archdata.of_node, dma_window,

	of_parse_dma_window(dev->dev.archdata.of_node, dma_window,

			    &tbl->it_index, &offset, &size);

			    &tbl->it_index, &offset, &size);