On Sat, Nov 11, 2023 at 2:25 PM shiqiang.deng
<shiqiang.deng213@xxxxxxxxx> wrote:
>
> In the cm_write() function, memory is allocated,
> and at the end of the function when uncopied_bytes is 0,
> the memory is freed. If uncopied_bytes is not equal to 0,
> a memory leak occurs.
>
> Signed-off-by: shiqiang.deng <shiqiang.deng213@xxxxxxxxx>
> ---
> drivers/acpi/custom_method.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
> index d39a9b474727..5103c7c3a6ce 100644
> --- a/drivers/acpi/custom_method.c
> +++ b/drivers/acpi/custom_method.c
> @@ -77,6 +77,9 @@ static ssize_t cm_write(struct file *file, const char __user *user_buf,
> if (ACPI_FAILURE(status))
> return -EINVAL;
> add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
> + } else {
> + kfree(buf);
> + buf = NULL;
> }
>
> return count;
> --
That was discussed in the past and I still would rather drop this I/F
completely instead of patching it for minor issues.
