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platform/x86: lenovo-wmi-helpers: Fix memory leak in lwmi_dev_evaluate_int()

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lwmi_dev_evaluate_int() leaks output.pointer when retval == NULL (found
by sashiko.dev [1]).

Fix it by moving `ret_obj = output.pointer' outside of the `if (retval)'
block so that it is always freed by the __free cleanup callback.

No functional change intended.

Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Fixes: e521d16e76 ("platform/x86: Add lenovo-wmi-helpers")
Cc: stable@vger.kernel.org
Link: https://sashiko.dev/#/patchset/20260331181208.421552-1-derekjohn.clark%40gmail.com [1]
Signed-off-by: Rong Zhang <i@rong.moe>
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
Link: https://patch.msgid.link/20260510042546.436874-2-derekjohn.clark@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Rong Zhang 2026-05-10 04:25:31 +00:00 committed by Ilpo Järvinen
parent a59e45221d
commit 0c3887a134
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 2 additions and 2 deletions
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4
drivers/platform/x86/lenovo/wmi-helpers.c
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@ -46,7 +46,6 @@ int lwmi_dev_evaluate_int(struct wmi_device *wdev, u8 instance, u32 method_id,
unsigned char *buf, size_t size, u32 *retval)
{
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *ret_obj __free(kfree) = NULL;
struct acpi_buffer input = { size, buf };
acpi_status status;
@ -55,8 +54,9 @@ int lwmi_dev_evaluate_int(struct wmi_device *wdev, u8 instance, u32 method_id,
if (ACPI_FAILURE(status))
return -EIO;
union acpi_object *ret_obj __free(kfree) = output.pointer;
if (retval) {
ret_obj = output.pointer;
if (!ret_obj)
return -ENODATA;