When acpi_evaluate_object() is passed ACPI_ALLOCATE_BUFFER, the caller must kfree the returned buffer if AE_OK is returned.
The callers of wmi_get_event_data() pass ACPI_ALLOCATE_BUFFER, and thus must check its return value before accessing or kfree() on the buffer. This patch adds return value checking for wmi_get_event_data() and adds a missing kfree(obj) in the end of wmi_notify_debug Signed-off-by: Axel Lin <[email protected]> --- drivers/platform/x86/wmi.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index e4eaa14..5bb0ae1 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -518,8 +518,13 @@ static void wmi_notify_debug(u32 value, void *context) { struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; + acpi_status status; - wmi_get_event_data(value, &response); + status = wmi_get_event_data(value, &response); + if (status != AE_OK) { + printk(KERN_INFO "wmi: bad event status 0x%x\n", status); + return; + } obj = (union acpi_object *)response.pointer; @@ -543,6 +548,7 @@ static void wmi_notify_debug(u32 value, void *context) default: printk("object type 0x%X\n", obj->type); } + kfree(obj); } /** -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
