[PATCH] platform/wmi: Fix unchecked min_size in wmidev_invoke_method()

[Kurt Borja]

After calling wmidev_evaluate_method(), if the ACPI core does not return
an out object, then wmidev_invoke_method() bypasses the min_size check
and returns 0. Add a check for min_size if there is not an out object.

Fixes: 1aeded2f55f0 ("platform/wmi: Extend wmidev_query_block() to reject undersized data")
Closes: https://sashiko.dev/#/patchset/20260406203237.2970-1-W_Armin%40gmx.de
Signed-off-by: Kurt Borja <kuurtb@xxxxxxxxx>
---
 drivers/platform/wmi/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/platform/wmi/core.c b/drivers/platform/wmi/core.c
index 7aa40dab6145..5a2ffcbab6af 100644
--- a/drivers/platform/wmi/core.c
+++ b/drivers/platform/wmi/core.c
@@ -411,6 +411,9 @@ int wmidev_invoke_method(struct wmi_device *wdev, u8 instance, u32 method_id,
 
 	obj = aout.pointer;
 	if (!obj) {
+		if (min_size != 0)
+			return -ENOMSG;
+
 		out->length = 0;
 		out->data = ZERO_SIZE_PTR;
 

---
base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
change-id: 20260429-invoke-fix-44f026f90c56

-- 
Thanks, 
 ~ Kurt