Update scarlett2_usb_get_config() and scarlett2_usb_set_config() to
make sure that the config_item_num is valid for the device.
Signed-off-by: Geoffrey D. Bennett <g@xxxxx>
---
sound/usb/mixer_scarlett2.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/sound/usb/mixer_scarlett2.c b/sound/usb/mixer_scarlett2.c
index bff777a93d65..4849dfeea429 100644
--- a/sound/usb/mixer_scarlett2.c
+++ b/sound/usb/mixer_scarlett2.c
@@ -1528,6 +1528,12 @@ static int scarlett2_usb_get_config(
u8 *buf_8;
u8 value;
+ /* Check that the configuration item is present in the
+ * configuration set used by this device
+ */
+ if (!config_item->offset)
+ return -EFAULT;
+
/* For byte-sized parameters, retrieve directly into buf */
if (config_item->size >= 8) {
size = config_item->size / 8 * count;
@@ -1594,6 +1600,12 @@ static int scarlett2_usb_set_config(
int offset, size;
int err;
+ /* Check that the configuration item is present in the
+ * configuration set used by this device
+ */
+ if (!config_item->offset)
+ return -EFAULT;
+
/* Cancel any pending NVRAM save */
cancel_delayed_work_sync(&private->work);
--
2.43.0
