linux-kernel - Re: [PATCH] media: verisilicon: Fix crash when probing encoder

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Message-ID: <e377a31f457e226eaa3d23f712696ddb3578ef6b.camel@collabora.com>
Date:   Thu, 13 Apr 2023 15:45:10 -0400
From:   Nicolas Dufresne <nicolas.dufresne@...labora.com>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        ezequiel@...guardiasur.com.ar, p.zabel@...gutronix.de,
        mchehab@...nel.org, m.szyprowski@...sung.com
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH] media: verisilicon: Fix crash when probing encoder

Le jeudi 13 avril 2023 à 09:03 +0200, Benjamin Gaignard a écrit :
> ctx->vpu_dst_fmt is no more initialized before calling hantro_try_fmt()
> so assigne it to vpu_fmt led to crash the kernel.
> Like for decoder case use 'fmt' as vpu format for encoder and clean up
> the code.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Fixes: db6f68b51e5c ("media: verisilicon: Do not set context src/dst formats in reset functions")

Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

> ---
>  drivers/media/platform/verisilicon/hantro_v4l2.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
> index 8f1414085f47..51f528f36241 100644
> --- a/drivers/media/platform/verisilicon/hantro_v4l2.c
> +++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
> @@ -293,13 +293,11 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
>  		pix_mp->pixelformat = fmt->fourcc;
>  	}
>  
> +	vpu_fmt = fmt;
> +
>  	if (coded) {
>  		pix_mp->num_planes = 1;
> -		vpu_fmt = fmt;
> -	} else if (ctx->is_encoder) {
> -		vpu_fmt = ctx->vpu_dst_fmt;
> -	} else {
> -		vpu_fmt = fmt;
> +	} else if (!ctx->is_encoder) {
>  		/*
>  		 * Width/height on the CAPTURE end of a decoder are ignored and
>  		 * replaced by the OUTPUT ones.
> -- 
> 2.34.1
> 
>