iommu/io-pgtable: Sanitise map/unmap addresses

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It may be an egregious error to attempt to use addresses outside the
range of the pagetable format, but that still doesn't mean we should
merrily wreak havoc by silently mapping/unmapping whatever truncated
portions of them might happen to correspond to real addresses.

Add some up-front checks to sanitise our inputs so that buggy callers
don't invite potential memory corruption.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Robin Murphy 2017-07-03 14:52:24 +01:00 • committed by Will Deacon

parent c54451a5e2

commit 7655739143

2 changed files with 13 additions and 0 deletions

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6

drivers/iommu/io-pgtable-arm-v7s.c

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7

drivers/iommu/io-pgtable-arm.c

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