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dell-wmi, hp-wmi, msi-wmi: check wmi_get_event_data() return value

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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>
This commit is contained in:
Len Brown 2009-12-26 23:02:24 -05:00
parent f27725756b
commit fda11e61ff
3 changed files with 18 additions and 3 deletions
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7
drivers/platform/x86/dell-wmi.c
View File

@ -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;

7
drivers/platform/x86/hp-wmi.c
View File

@ -338,8 +338,13 @@ static void hp_wmi_notify(u32 value, void *context)
static struct key_entry *key;
union acpi_object *obj;
int eventcode;
acpi_status status;
wmi_get_event_data(value, &response);
status = wmi_get_event_data(value, &response);
if (status != AE_OK) {
printk(KERN_INFO "hp-wmi: bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;

7
drivers/platform/x86/msi-wmi.c
View File

@ -149,8 +149,13 @@ static void msi_wmi_notify(u32 value, void *context)
static struct key_entry *key;
union acpi_object *obj;
ktime_t cur;
acpi_status status;
wmi_get_event_data(value, &response);
status = wmi_get_event_data(value, &response);
if (status != AE_OK) {
printk(KERN_INFO DRV_PFX "bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;