linux-kernel - Re: [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation

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Date:   Fri, 11 Jun 2021 17:15:43 +0100
From:   Will Deacon <will@...nel.org>
To:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Xiyu Yang <xiyuyang19@...an.edu.cn>,
        Krishna Reddy <vdumpa@...dia.com>,
        Rob Clark <robdclark@...omium.org>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Jon Hunter <jonathanh@...dia.com>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>, Xin Tan <tanxin.ctf@...il.com>,
        yuanxzhang@...an.edu.cn
Subject: Re: [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation

On Thu, 10 Jun 2021 10:49:20 +0800, Xiyu Yang wrote:
> The reference counting issue happens in several exception handling paths
> of arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the
> function forgets to decrease the refcount of "smmu" increased by
> arm_smmu_rpm_get(), causing a refcount leak.
> 
> Fix this issue by jumping to "out" label when those error scenarios
> occur.

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation
      https://git.kernel.org/will/c/7c8f176d6a3f

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev