From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 0487d4fc42d7f31a56cfd9e2237f9ebd889e6112 ]
As pointed out be Kees Cook if we return -EIO because the obj->type != ACPI_TYPE_BUFFER, then we must kfree the output buffer before the return.
Fixes: 1a258e670434 ("platform/x86: dell-smbios-wmi: Add new WMI dispatcher driver") Reported-by: Kees Cook keescook@chromium.org Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20210826140822.71198-1-hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/dell-smbios-wmi.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/platform/x86/dell-smbios-wmi.c b/drivers/platform/x86/dell-smbios-wmi.c index ccccce9b67ef..0ebcf412f6ca 100644 --- a/drivers/platform/x86/dell-smbios-wmi.c +++ b/drivers/platform/x86/dell-smbios-wmi.c @@ -72,6 +72,7 @@ static int run_smbios_call(struct wmi_device *wdev) if (obj->type == ACPI_TYPE_INTEGER) dev_dbg(&wdev->dev, "SMBIOS call failed: %llu\n", obj->integer.value); + kfree(output.pointer); return -EIO; } memcpy(&priv->buf->std, obj->buffer.pointer, obj->buffer.length);