From: Maulik Mankad <maulik@xxxxxx>
One of the USB CV MSC tests issues Get Max LUN request with
invalid wIndex (wIndex = 65535) parameter.
Add proper handling to prevent array index out of bounds issue.
Signed-off-by: Maulik Mankad <maulik@xxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/composite.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index f6ff845..1ba4bef 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -928,8 +928,9 @@ unknown:
*/
switch (ctrl->bRequestType & USB_RECIP_MASK) {
case USB_RECIP_INTERFACE:
- if (cdev->config)
- f = cdev->config->interface[intf];
+ if (!cdev->config || w_index >= MAX_CONFIG_INTERFACES)
+ break;
+ f = cdev->config->interface[intf];
break;
case USB_RECIP_ENDPOINT:
--
1.7.1
--
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