Re: [PATCH] clk: imx: scu: fix a potential memory leak in __imx_clk_gpr_scu()

From: Abel Vesa
Date: Fri Apr 08 2022 - 07:55:36 EST


On 22-04-07 15:37:22, xkernel.wang@xxxxxxxxxxx wrote:
> From: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>
>
> In __imx_clk_gpr_scu(), if imx_scu_clk_is_valid(rsrc_id) fails, then
> `clk_node` which is allocated by kzalloc() is not properly released,
> which may lead to memory leak.
> So this patch added kfree(clk_node) on the above error path before
> return ERR_PTR(-EINVAL).
>
> Signed-off-by: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>

Reviewed-by: Abel Vesa <abel.vesa@xxxxxxx>

> ---
> drivers/clk/imx/clk-scu.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c
> index 083da31..ed3c01d 100644
> --- a/drivers/clk/imx/clk-scu.c
> +++ b/drivers/clk/imx/clk-scu.c
> @@ -837,8 +837,10 @@ struct clk_hw *__imx_clk_gpr_scu(const char *name, const char * const *parent_na
> if (!clk_node)
> return ERR_PTR(-ENOMEM);
>
> - if (!imx_scu_clk_is_valid(rsrc_id))
> + if (!imx_scu_clk_is_valid(rsrc_id)) {
> + kfree(clk_node);
> return ERR_PTR(-EINVAL);
> + }
>
> clk = kzalloc(sizeof(*clk), GFP_KERNEL);
> if (!clk) {
> --