arm_iommu_create_mapping() has size parameter of size_t and
arm_setup_iommu_dma_ops() can take a value higher than that
when this is called from the of code. So limit the size to
SIZE_MAX.
Cc: Joerg Roedel <j...@8bytes.org>
Cc: Grant Likely <grant.lik...@linaro.org>
Cc: Rob Herring <robh...@kernel.org>
Cc: Bjorn Helgaas <bhelg...@google.com>
Cc: Will Deacon <will.dea...@arm.com>
Cc: Russell King <li...@arm.linux.org.uk>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
Signed-off-by: Murali Karicheri <m-kariche...@ti.com>
---
arch/arm/mm/dma-mapping.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 7864797..496b2c3 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -2004,6 +2004,13 @@ static bool arm_setup_iommu_dma_ops(struct device *dev,
u64 dma_base, u64 size,
if (!iommu)
return false;
+ /*
+ * currently arm_iommu_create_mapping() takes a max of size_t
+ * for size param. So check this limit for now.
+ */
+ if (size > SIZE_MAX)
+ return false;
+
mapping = arm_iommu_create_mapping(dev->bus, dma_base, size);
if (IS_ERR(mapping)) {
pr_warn("Failed to create %llu-byte IOMMU mapping for device
%s\n",
--
1.7.9.5
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