From fda11e61ff8a4e3a8ebbd434e46560b67cc0ca9d Mon Sep 17 00:00:00 2001 From: Len Brown Date: Sat, 26 Dec 2009 23:02:24 -0500 Subject: dell-wmi, hp-wmi, msi-wmi: check wmi_get_event_data() return value 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. Signed-off-by: Len Brown --- drivers/platform/x86/dell-wmi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/platform/x86/dell-wmi.c') diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c index 4c7e70299d6b..500af8c9ada0 100644 --- a/drivers/platform/x86/dell-wmi.c +++ b/drivers/platform/x86/dell-wmi.c @@ -202,8 +202,13 @@ static void dell_wmi_notify(u32 value, void *context) struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; static struct key_entry *key; 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 "dell-wmi: bad event status 0x%x\n", status); + return; + } obj = (union acpi_object *)response.pointer; -- cgit v1.2.1