linux-kernel - Re: [PATCH v1 5/5] misc: fastrpc: Add missing unmapping user-requested remote heap

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Message-ID: <22uccyp5m2szry7bpitqcav5nlvwch5eqh4mdacfedidgrnyhx@vsjobngwdkmb>
Date: Mon, 19 May 2025 13:52:31 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
Cc: srinivas.kandagatla@....qualcomm.com, linux-arm-msm@...r.kernel.org,
        gregkh@...uxfoundation.org, quic_bkumar@...cinc.com,
        linux-kernel@...r.kernel.org, quic_chennak@...cinc.com,
        dri-devel@...ts.freedesktop.org, arnd@...db.de, stable@...nel.org
Subject: Re: [PATCH v1 5/5] misc: fastrpc: Add missing unmapping
 user-requested remote heap

On Tue, May 13, 2025 at 09:58:25AM +0530, Ekansh Gupta wrote:
> User request for remote heap allocation is supported using ioctl
> interface but support for unmap is missing. This could result in
> memory leak issues. Add unmap user request support for remote heap.

Can this memory be in use by the remote proc?

> 
> Fixes: 532ad70c6d449 ("misc: fastrpc: Add mmap request assigning for static PD pool")
> Cc: stable@...nel.org
> Signed-off-by: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
> ---
>  drivers/misc/fastrpc.c | 62 ++++++++++++++++++++++++++++++++++--------
>  1 file changed, 51 insertions(+), 11 deletions(-)
> 

-- 
With best wishes
Dmitry