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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>
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parent
f27725756b
commit
fda11e61ff
3 changed files with 18 additions and 3 deletions
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@ -202,8 +202,13 @@ static void dell_wmi_notify(u32 value, void *context)
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struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
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static struct key_entry *key;
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union acpi_object *obj;
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acpi_status status;
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wmi_get_event_data(value, &response);
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status = wmi_get_event_data(value, &response);
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if (status != AE_OK) {
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printk(KERN_INFO "dell-wmi: bad event status 0x%x\n", status);
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return;
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}
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obj = (union acpi_object *)response.pointer;
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@ -338,8 +338,13 @@ static void hp_wmi_notify(u32 value, void *context)
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static struct key_entry *key;
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union acpi_object *obj;
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int eventcode;
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acpi_status status;
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wmi_get_event_data(value, &response);
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status = wmi_get_event_data(value, &response);
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if (status != AE_OK) {
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printk(KERN_INFO "hp-wmi: bad event status 0x%x\n", status);
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return;
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}
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obj = (union acpi_object *)response.pointer;
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@ -149,8 +149,13 @@ static void msi_wmi_notify(u32 value, void *context)
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static struct key_entry *key;
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union acpi_object *obj;
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ktime_t cur;
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acpi_status status;
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wmi_get_event_data(value, &response);
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status = wmi_get_event_data(value, &response);
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if (status != AE_OK) {
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printk(KERN_INFO DRV_PFX "bad event status 0x%x\n", status);
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return;
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}
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obj = (union acpi_object *)response.pointer;
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