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usb: gadget: composite: avoid access beyond array max length 

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@ti.com>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Maulik Mankad 2011-01-13 18:19:56 +05:30 committed by Greg Kroah-Hartman
parent d14fc1a74e
commit 3c47eb06f0
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/gadget/composite.c
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@ -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: