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

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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 <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wolfram Sang 2014-01-13 11:29:23 +01:00 committed by Greg Kroah-Hartman
parent f563926fed
commit 1b9fb31f7d
1 changed files with 3 additions and 0 deletions
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drivers/usb/core/driver.c
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@ -73,6 +73,9 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids,
if (fields > 4) { if (fields > 4) {
const struct usb_device_id *id = id_table; const struct usb_device_id *id = id_table;
if (!id)
return -ENODEV;
for (; id->match_flags; id++) for (; id->match_flags; id++)
if (id->idVendor == refVendor && id->idProduct == refProduct) if (id->idVendor == refVendor && id->idProduct == refProduct)
break; break;