From: Will Deacon <will@kernel.org>
To: iommu@lists.linux-foundation.org,
Nicolin Chen <nicoleotsuka@gmail.com>,
Joerg Roedel <joro@8bytes.org>,
Jordan Crouse <jordan@cosmicpenguin.net>,
Robin Murphy <robin.murphy@arm.com>,
Krishna Reddy <vdumpa@nvidia.com>,
linux-kernel@vger.kernel.org, Xiyu Yang <xiyuyang19@fudan.edu.cn>,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>, Xin Tan <tanxin.ctf@gmail.com>,
yuanxzhang@fudan.edu.cn
Subject: Re: [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
Date: Fri, 11 Jun 2021 17:15:44 +0100 [thread overview]
Message-ID: <162340794186.3698890.4788653563160979192.b4-ty@kernel.org> (raw)
In-Reply-To: <1623293672-17954-1-git-send-email-xiyuyang19@fudan.edu.cn>
On Thu, 10 Jun 2021 10:54:29 +0800, Xiyu Yang wrote:
> arm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the
> refcount of the "smmu" even though the return value is less than 0.
>
> The reference counting issue happens in some error handling paths of
> arm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get()
> fails, the caller functions forget to decrease the refcount of "smmu"
> increased by arm_smmu_rpm_get(), causing a refcount leak.
>
> [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
https://git.kernel.org/will/c/1adf30f198c2
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: iommu@lists.linux-foundation.org,
Nicolin Chen <nicoleotsuka@gmail.com>,
Joerg Roedel <joro@8bytes.org>,
Jordan Crouse <jordan@cosmicpenguin.net>,
Robin Murphy <robin.murphy@arm.com>,
Krishna Reddy <vdumpa@nvidia.com>,
linux-kernel@vger.kernel.org, Xiyu Yang <xiyuyang19@fudan.edu.cn>,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, Xin Tan <tanxin.ctf@gmail.com>,
yuanxzhang@fudan.edu.cn, kernel-team@android.com,
Will Deacon <will@kernel.org>
Subject: Re: [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
Date: Fri, 11 Jun 2021 17:15:44 +0100 [thread overview]
Message-ID: <162340794186.3698890.4788653563160979192.b4-ty@kernel.org> (raw)
In-Reply-To: <1623293672-17954-1-git-send-email-xiyuyang19@fudan.edu.cn>
On Thu, 10 Jun 2021 10:54:29 +0800, Xiyu Yang wrote:
> arm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the
> refcount of the "smmu" even though the return value is less than 0.
>
> The reference counting issue happens in some error handling paths of
> arm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get()
> fails, the caller functions forget to decrease the refcount of "smmu"
> increased by arm_smmu_rpm_get(), causing a refcount leak.
>
> [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
https://git.kernel.org/will/c/1adf30f198c2
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: iommu@lists.linux-foundation.org,
Nicolin Chen <nicoleotsuka@gmail.com>,
Joerg Roedel <joro@8bytes.org>,
Jordan Crouse <jordan@cosmicpenguin.net>,
Robin Murphy <robin.murphy@arm.com>,
Krishna Reddy <vdumpa@nvidia.com>,
linux-kernel@vger.kernel.org, Xiyu Yang <xiyuyang19@fudan.edu.cn>,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>, Xin Tan <tanxin.ctf@gmail.com>,
yuanxzhang@fudan.edu.cn
Subject: Re: [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
Date: Fri, 11 Jun 2021 17:15:44 +0100 [thread overview]
Message-ID: <162340794186.3698890.4788653563160979192.b4-ty@kernel.org> (raw)
In-Reply-To: <1623293672-17954-1-git-send-email-xiyuyang19@fudan.edu.cn>
On Thu, 10 Jun 2021 10:54:29 +0800, Xiyu Yang wrote:
> arm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the
> refcount of the "smmu" even though the return value is less than 0.
>
> The reference counting issue happens in some error handling paths of
> arm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get()
> fails, the caller functions forget to decrease the refcount of "smmu"
> increased by arm_smmu_rpm_get(), causing a refcount leak.
>
> [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
https://git.kernel.org/will/c/1adf30f198c2
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-06-11 16:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 2:54 [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails Xiyu Yang
2021-06-10 2:54 ` Xiyu Yang
2021-06-10 2:54 ` Xiyu Yang via iommu
2021-06-11 16:15 ` Will Deacon [this message]
2021-06-11 16:15 ` Will Deacon
2021-06-11 16:15 ` Will Deacon
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