prism54: potential memory corruption in prism54_get_essid()

"dwrq->length" is the capped version of "essid->length".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/prism54/isl_ioctl.c b/drivers/net/wireless/prism54/isl_ioctl.c
index d97a2caf582b3997f2378434117758a928cefbd3..bc2ba80c47bb9ff0105d8ed2c119ab3b3589364e 100644 (file)
--- a/drivers/net/wireless/prism54/isl_ioctl.c
+++ b/drivers/net/wireless/prism54/isl_ioctl.c
@@ -778,7 +778,7 @@ prism54_get_essid(struct net_device *ndev, struct iw_request_info *info,
                dwrq->flags = 0;
                dwrq->length = 0;
        }
-       essid->octets[essid->length] = '\0';
+       essid->octets[dwrq->length] = '\0';
        memcpy(extra, essid->octets, dwrq->length);
        kfree(essid);