Any device requiring to be attached to an iommu_domain must have
valid archdata containing the necessary iommu information, which
is SoC-specific. Add a check in the omap_iommu_attach_dev to make
sure that the device has valid archdata before accessing
different SoC-specific fields of the archdata. This prevents a
NULL pointer dereference on any misconfigured devices.
Signed-off-by: Suman Anna <s-anna@xxxxxx>
---
drivers/iommu/omap-iommu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 02ef0ac..ea6e59d 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1090,6 +1090,11 @@ omap_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
int ret = 0;
+ if (!arch_data || !arch_data->name) {
+ dev_err(dev, "device doesn't have an associated iommu\n");
+ return -EINVAL;
+ }
+
spin_lock(&omap_domain->lock);
/* only a single device is supported per domain for now */
--
2.0.4
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