Re: [PATCH] crypto: rk3288 - Fix use after free in unprepare

[Andrey Skvortsov]

On 24-02-28 17:13, Herbert Xu wrote:
> The unprepare call must be carried out before the finalize call
> as the latter can free the request.
> 
> Fixes: c66c17a0f69b ("crypto: rk3288 - Remove prepare/unprepare request")
> Reported-by: Andrey Skvortsov <andrej.skvortzov@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> 
> diff --git a/drivers/crypto/rockchip/rk3288_crypto_ahash.c b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
> index 1b13b4aa16ec..a235e6c300f1 100644
> --- a/drivers/crypto/rockchip/rk3288_crypto_ahash.c
> +++ b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
> @@ -332,12 +332,12 @@ static int rk_hash_run(struct crypto_engine *engine, void *breq)
>  theend:
>  	pm_runtime_put_autosuspend(rkc->dev);
>  
> +	rk_hash_unprepare(engine, breq);
> +
>  	local_bh_disable();
>  	crypto_finalize_hash_request(engine, breq, err);
>  	local_bh_enable();
>  
> -	rk_hash_unprepare(engine, breq);
> -
>  	return 0;
>  }
>  
Thanks, that was quick. I had locally the same change.

Reviewed-by: Andrey Skvortsov <andrej.skvortzov@xxxxxxxxx>

-- 
Best regards,
Andrey Skvortsov