usb: core: check for valid id_table when using the RefId feature

When implementing the RefId feature, it was missed that id_tables can be NULL under special circumstances. Bail out in that case. Signed-off-by: Wolfram Sang <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
huntrar · Jan 13, 2014 · 1b9fb31 · 1b9fb31
1 parent f563926
commit 1b9fb31
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
@@ -73,6 +73,9 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids,
 	if (fields > 4) {
 		const struct usb_device_id *id = id_table;
 
+		if (!id)
+			return -ENODEV;
+
 		for (; id->match_flags; id++)
 			if (id->idVendor == refVendor && id->idProduct == refProduct)
 				break;