CVE-2010-4648: Low severity Linux Linux kernel vulnerability

Enable the port when disabling countermeasures, and disable it on enabling countermeasures. This bug causes the response of the system to certain attacks to be ineffective. It also prevents wpasupplicant from getting scan results, as wpasupplicant disables countermeasures on startup - preventing the hardware from scanning. wpasupplicant works with apmode=2 despite this bug because the commit handler re-enables the port. The log tends to look like: State: DISCONNECTED -> SCANNING Starting AP scan for wildcard SSID Scan requested (ret=0) - scan timeout 5 seconds EAPOL: disable timer tick EAPOL: Supplicant port status: Unauthorized Scan timeout - try to get results Failed to get scan results Failed to get scan results - try scanning again Setting scan request: 1 sec 0 usec Starting AP scan for wildcard SSID Scan requested (ret=-1) - scan timeout 5 seconds Failed to initiate AP scan.

Upstream commit: http://git.kernel.org/linus/0a54917c3fc295cb61f3fb52373c173fd3b69f48