linux-kernel - Re: [PATCH 03/25] media: iris: Fix memory leak by freeing untracked persist buffer

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Message-ID: <adc18006-a0d0-e0ef-a16f-0767b6bc0a3d@quicinc.com>
Date: Wed, 16 Jul 2025 11:37:06 +0530
From: Vikash Garodia <quic_vgarodia@...cinc.com>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>,
        Abhinav Kumar
	<abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil
	<hverkuil@...all.nl>,
        Stefan Schmidt <stefan.schmidt@...aro.org>,
        "Vedang
 Nagar" <quic_vnagar@...cinc.com>
CC: <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/25] media: iris: Fix memory leak by freeing untracked
 persist buffer


On 7/4/2025 1:23 PM, Dikshita Agarwal wrote:
> One internal buffer which is allocated only once per session was not
> being freed during session close because it was not being tracked as
> part of internal buffer list which resulted in a memory leak.
> 
> Add the necessary logic to explicitly free the untracked internal buffer
> during session close to ensure all allocated memory is released
> properly.
> 
> Fixes: 73702f45db81 ("media: iris: allocate, initialize and queue internal buffers")
> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
> ---
>  drivers/media/platform/qcom/iris/iris_buffer.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_buffer.c b/drivers/media/platform/qcom/iris/iris_buffer.c
> index 6425e4919e3b0b849ba801ca9e01921c114144cd..9f664c241149362d44d3a8fa65e2266f9c2e80e0 100644
> --- a/drivers/media/platform/qcom/iris/iris_buffer.c
> +++ b/drivers/media/platform/qcom/iris/iris_buffer.c
> @@ -413,6 +413,16 @@ static int iris_destroy_internal_buffers(struct iris_inst *inst, u32 plane, bool
>  		}
>  	}
>  
> +	if (force) {
> +		buffers = &inst->buffers[BUF_PERSIST];
> +
> +		list_for_each_entry_safe(buf, next, &buffers->list, list) {
> +			ret = iris_destroy_internal_buffer(inst, buf);
> +			if (ret)
> +				return ret;
> +		}
> +	}
> +
>  	return 0;
>  }
>  
> 

Reviewed-by: Vikash Garodia <quic_vgarodia@...cinc.com>