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

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Message-ID: <dc67df54-2a19-4318-acd4-b96b8549b64d@oss.qualcomm.com>
Date: Mon, 19 May 2025 16:28:34 +0530
From: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....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 5/19/2025 4:22 PM, Dmitry Baryshkov wrote:
> 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?
Remote heap allocation request is only intended for audioPD. Other PDs
running on DSP are not intended to use this request.
>
>> 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(-)
>>