linux-kernel - Re: [PATCH v2 5/6] media: iris: gen2: Add sanity check for session stop

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Message-ID: <f443d903-b69e-4e59-8366-e1970dca913b@oss.qualcomm.com>
Date: Mon, 12 Jan 2026 16:39:18 +0530
From: Vikash Garodia <vikash.garodia@....qualcomm.com>
To: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bod@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...nel.org>,
        Stefan Schmidt <stefan.schmidt@...aro.org>,
        Hans Verkuil <hverkuil+cisco@...nel.org>,
        Wangao Wang <wangao.wang@....qualcomm.com>
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH v2 5/6] media: iris: gen2: Add sanity check for session
 stop


On 12/29/2025 12:01 PM, Dikshita Agarwal wrote:
> In iris_kill_session, inst->state is set to IRIS_INST_ERROR and
> session_close is executed, which will kfree(inst_hfi_gen2->packet).
> If stop_streaming is called afterward, it will cause a crash.
> 
> Add a NULL check for inst_hfi_gen2->packet before sendling STOP packet
> to firmware to fix that.
> 
> Fixes: 11712ce70f8e ("media: iris: implement vb2 streaming ops")
> Signed-off-by: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>
> ---
>   drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
> index 6a772db2ec33fb002d8884753a41dc98b3a8439d..59e41adcce9aadd7c60bb1d369d68a4954f62aef 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
> @@ -963,6 +963,9 @@ static int iris_hfi_gen2_session_stop(struct iris_inst *inst, u32 plane)
>   	struct iris_inst_hfi_gen2 *inst_hfi_gen2 = to_iris_inst_hfi_gen2(inst);
>   	int ret = 0;
>   
> +	if (!inst_hfi_gen2->packet)
> +		return -EINVAL;
> +
>   	reinit_completion(&inst->completion);
>   
>   	iris_hfi_gen2_packet_session_command(inst,
> 

Reviewed-by: Vikash Garodia<vikash.garodia@....qualcomm.com>