[patch 47/88] USB: fix oops in cdc-wdm in case of malformed descriptors

Greg KH
2009-04-30T17:28:45Z

[-- Attachment #1: 0079-USB-fix-oops-in-cdc-wdm-in-case-of-malformed-descri.patch --]
[-- Type: text/plain, Size: 782 bytes --]

2.6.28-stable review patch. If anyone has any objections, please let us know.

------------------

From: Oliver Neukum <oliver@neukum.org>

upstream commit: e13c594f3a1fc2c78e7a20d1a07974f71e4b448f

cdc-wdm needs to ignore extremely malformed descriptors.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---
drivers/usb/class/cdc-wdm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -652,7 +652,7 @@ next_desc:

iface = &intf->altsetting[0];
ep = &iface->endpoint[0].desc;
- if (!usb_endpoint_is_int_in(ep)) {
+ if (!ep || !usb_endpoint_is_int_in(ep)) {
rv = -EINVAL;
goto err;
}