iommu/arm-smmu-v3: Don't free page table ops twice

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commit 57d72e159b upstream.

Kasan reports a double free when finalise_stage_fn fails: the io_pgtable
ops are freed by arm_smmu_domain_finalise and then again by
arm_smmu_domain_free. Prevent this by leaving pgtbl_ops empty on failure.

Fixes: 48ec83bcbc ("iommu/arm-smmu: Add initial driver support for ARM SMMUv3 devices")
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Jean-Philippe Brucker 2017-12-14 11:03:01 +00:00 • committed by Greg Kroah-Hartman

parent 289b51d3c1

commit 3ea9d6d0ad

1 changed files with 5 additions and 3 deletions

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drivers/iommu/arm-smmu-v3.c

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