linux-kernel - Re: [PATCH] RDMA/hfi1: Convert from atomic_t to refcount_t on hfi1_devdata->user

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Message-ID: <cb4b1dbf-67b3-1dea-8f67-43b22c7ace06@cornelisnetworks.com>
Date:   Wed, 21 Jul 2021 14:09:44 -0400
From:   Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>
To:     Xiyu Yang <xiyuyang19@...an.edu.cn>,
        Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     yuanxzhang@...an.edu.cn, Xin Tan <tanxin.ctf@...il.com>
Subject: Re: [PATCH] RDMA/hfi1: Convert from atomic_t to refcount_t on
 hfi1_devdata->user_refcount

On 7/19/21 2:00 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>

Tested-by: Josh Fisher <josh.fisher@...nelisnetworks.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>