Unverified Commit d3b7a868 authored by Kurt Borja's avatar Kurt Borja Committed by Ilpo Järvinen
Browse files

platform/wmi: Fix unchecked min_size in wmidev_invoke_method() 

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: 1aeded2f ("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: default avatarKurt Borja <kuurtb@gmail.com>
Reviewed-by: default avatarArmin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260429-invoke-fix-v1-1-ce938eb80cd3@gmail.com


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent 254f4963

drivers/platform/wmi/core.c

+3 −0
Original line number Diff line number Diff line
@@ -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;