tree fa8a71f06bc09e1943cdba7be57c74687868a8b4
parent 30a7acd573899fd8b8ac39236eff6468b195ac7d
author Jean-Philippe Brucker <jean-philippe.brucker@arm.com> 1513249381 +0000
committer Will Deacon <will.deacon@arm.com> 1514911545 +0000

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

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.

Cc: <stable@vger.kernel.org>
Fixes: 48ec83bcbcf5 ("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>