linux-kernel - Re: [PATCH] iommu/amd: Convert from atomic_t to refcount_t on pasid

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Message-ID: <ec476aa0-dd6b-852c-439f-89735f5b08e7@amd.com>
Date:   Thu, 22 Jul 2021 14:34:53 -0500
From:   "Suthikulpanit, Suravee" <suravee.suthikulpanit@....com>
To:     Xiyu Yang <xiyuyang19@...an.edu.cn>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc:     yuanxzhang@...an.edu.cn, Xin Tan <tanxin.ctf@...il.com>
Subject: Re: [PATCH] iommu/amd: Convert from atomic_t to refcount_t on
 pasid_state->count



On 7/19/2021 3:32 AM, Xiyu Yang wrote:
> refcount_t type and corresponding API can protect refcounters from
> accidental underflow and overflow and further use-after-free situations.
> 
> Signed-off-by: Xiyu Yang <xiyuyang19@...an.edu.cn>
> Signed-off-by: Xin Tan <tanxin.ctf@...il.com>

Thanks,

Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>