Commit 3c47eb06 authored Jan 13, 2011 by Maulik Mankad Committed by Greg Kroah-Hartman Jan 22, 2011

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>

parent d14fc1a7

drivers/usb/gadget/composite.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -928,7 +928,8 @@ unknown:
		*/
		switch (ctrl->bRequestType & USB_RECIP_MASK) {
		case USB_RECIP_INTERFACE:
		if (cdev->config)
		if (!cdev->config \|\| w_index >= MAX_CONFIG_INTERFACES)
		break;
		f = cdev->config->interface[intf];
		break;