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authorLen Brown <len.brown@intel.com>2009-12-26 23:02:24 -0500
committerLen Brown <len.brown@intel.com>2009-12-30 02:48:52 -0500
commitfda11e61ff8a4e3a8ebbd434e46560b67cc0ca9d (patch)
treebfc911beea9c92888cafebe300740b92acc1b975 /drivers/platform
parentf27725756be8a2c2dc65eaf70d0b52807aa2f113 (diff)
downloadlinux-fda11e61ff8a4e3a8ebbd434e46560b67cc0ca9d.tar.bz2
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')
-rw-r--r--drivers/platform/x86/dell-wmi.c7
-rw-r--r--drivers/platform/x86/hp-wmi.c7
-rw-r--r--drivers/platform/x86/msi-wmi.c7
3 files changed, 18 insertions, 3 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;
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 18bf74136d24..5b648f0c6075 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -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;
diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
index f746c677adaa..f5f70d4c6913 100644
--- a/drivers/platform/x86/msi-wmi.c
+++ b/drivers/platform/x86/msi-wmi.c
@@ -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;