Re: [PATCH -next 1/2] spi: microchip-core: fix UAF in mchp_corespi_remove()

[<Conor.Dooley@xxxxxxxxxxxxx>]

On 12/07/2022 14:53, Yang Yingliang wrote:
> When using devm_spi_register_master(), the unregister function will
> be called in devres_release_all() which is called after ->remove(),
> so remove spi_unregister_master() andspi_master_put().
> 
> Fixes: 9ac8d17694b6 ("spi: add support for microchip fpga spi controllers")
> Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>

With 59ebbe40fb51 ("spi: simplify devm_spi register_controller") reverted,
this looks good to me.

Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>

Thanks!

> ---
>  drivers/spi/spi-microchip-core.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/spi/spi-microchip-core.c b/drivers/spi/spi-microchip-core.c
> index b3083075cd36..c26767343176 100644
> --- a/drivers/spi/spi-microchip-core.c
> +++ b/drivers/spi/spi-microchip-core.c
> @@ -595,8 +595,6 @@ static int mchp_corespi_remove(struct platform_device *pdev)
>  	struct mchp_corespi *spi = spi_master_get_devdata(master);
>  
>  	mchp_corespi_disable_ints(spi);
> -	spi_unregister_master(master);
> -	spi_master_put(master);
>  	clk_disable_unprepare(spi->clk);
>  	mchp_corespi_disable(spi);
>