diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-05-19 21:52:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-07 12:52:25 -0700 |
| commit | ac68bccce92ef21afe2e506ef48954c6e7695f7e (patch) | |
| tree | 59b73c9de1fd09c4c3b421ca09e7435321c44557 | |
| parent | 08edd1c29f29e51f8ac32995b561578c1ec958f7 (diff) | |
USB: cxacru: potential underflow in cxacru_cm_get_array()
commit 2a0ebf80aa95cc758d4725f74a7016e992606a39 upstream.
The value of "offd" comes off the instance->rcv_buf[] and we used it as
the offset into an array. The problem is that we check the upper bound
but not for negative values.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/atm/cxacru.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c index b7eb86ad6bf..8a7eb77233b 100644 --- a/drivers/usb/atm/cxacru.c +++ b/drivers/usb/atm/cxacru.c @@ -686,7 +686,8 @@ static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_requ { int ret, len; __le32 *buf; - int offb, offd; + int offb; + unsigned int offd; const int stride = CMD_PACKET_SIZE / (4 * 2) - 1; int buflen = ((size - 1) / stride + 1 + size * 2) * 4; |