Re: [PATCH] drm/panthor: return error on truncated firmware

[Boris Brezillon]

On Tue, 14 Jul 2026 18:30:55 +0200
Osama Abdelkader <osama.abdelkader@xxxxxxxxx> wrote:

> panthor_fw_load() detects truncated firmware images, but jumps to the
> common cleanup path without setting ret. If no previous error was recorded,
> the function can return 0 and treat the invalid firmware as successfully
> loaded.
> 
> Set ret to -EINVAL before leaving the truncated-image path.
> 
> Fixes: 2718d91816ee ("drm/panthor: Add the FW logical block")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Osama Abdelkader <osama.abdelkader@xxxxxxxxx>

Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>

> ---
>  drivers/gpu/drm/panthor/panthor_fw.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
> index 986151681b24..39fff094ebb5 100644
> --- a/drivers/gpu/drm/panthor/panthor_fw.c
> +++ b/drivers/gpu/drm/panthor/panthor_fw.c
> @@ -829,6 +829,7 @@ static int panthor_fw_load(struct panthor_device *ptdev)
>  	}
>  
>  	if (hdr.size > iter.size) {
> +		ret = -EINVAL;
>  		drm_err(&ptdev->base, "Firmware image is truncated\n");
>  		goto out;
>  	}