Commit 4c9fb5d9 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Check dev->iommu in dev_iommu_priv_get() before dereferencing it 

The dev_iommu_priv_get() needs a similar check to
dev_iommu_fwspec_get() to make sure no NULL-ptr is dereferenced.

Fixes: 05a0542b ("iommu/amd: Store dev_data as device iommu private data")
Cc: stable@vger.kernel.org	# v5.8+
Link: https://lore.kernel.org/r/20210202145419.29143-1-joro@8bytes.org
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=211241


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 1048ba83

include/linux/iommu.h

+4 −1
Original line number Diff line number Diff line
@@ -616,7 +616,10 @@ static inline void dev_iommu_fwspec_set(struct device *dev, 


static inline void *dev_iommu_priv_get(struct device *dev)

{

	if (dev->iommu)

		return dev->iommu->priv;

	else

		return NULL;

}



static inline void dev_iommu_priv_set(struct device *dev, void *priv)