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| author | Len Brown <len.brown@intel.com> | 2009-12-27 05:02:24 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-30 08:48:52 +0100 |
| commit | fda11e61ff8a4e3a8ebbd434e46560b67cc0ca9d (patch) | |
| tree | bfc911beea9c92888cafebe300740b92acc1b975 /drivers/platform/x86/dell-wmi.c | |
| parent | ACPI: hp-wmi, msi-wmi: clarify that wmi_install_notify_handler() returns an a... (diff) | |
| download | linux-fda11e61ff8a4e3a8ebbd434e46560b67cc0ca9d.tar.xz linux-fda11e61ff8a4e3a8ebbd434e46560b67cc0ca9d.zip | |
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 <len.brown@intel.com>
Diffstat (limited to 'drivers/platform/x86/dell-wmi.c')
| -rw-r--r-- | drivers/platform/x86/dell-wmi.c | 7 |
1 files changed, 6 insertions, 1 deletions
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; |