On Wed, 16 Oct 2024 09:24:53 +0800
Jinjie Ruan <ruanjinjie@xxxxxxxxxx> wrote:
> If per_time_scales[i] or per_time_gains[i] kcalloc fails in the for loop
> of iio_gts_build_avail_scale_table(), the err_free_out will fail to call
> kfree() each time when i is reduced to 0, so all the per_time_scales[0]
> and per_time_gains[0] will not be freed, which will cause memory leaks.
>
> Fix it by checking if i >= 0.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 38416c28e168 ("iio: light: Add gain-time-scale helpers")
> Reviewed-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
> Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Applied.
> ---
> v2:
> - Update the commit message.
> - Add Reviewed-by.
> ---
> drivers/iio/industrialio-gts-helper.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/iio/industrialio-gts-helper.c b/drivers/iio/industrialio-gts-helper.c
> index 7326c7949244..5f131bc1a01e 100644
> --- a/drivers/iio/industrialio-gts-helper.c
> +++ b/drivers/iio/industrialio-gts-helper.c
> @@ -315,7 +315,7 @@ static int iio_gts_build_avail_scale_table(struct iio_gts *gts)
> return 0;
>
> err_free_out:
> - for (i--; i; i--) {
> + for (i--; i >= 0; i--) {
> kfree(per_time_scales[i]);
> kfree(per_time_gains[i]);
> }
