[PATCH] nl80211: Fix race condition in detecting MAC change
j at w1.fi
Sat May 13 11:02:23 PDT 2017
On Fri, Apr 28, 2017 at 05:59:30PM +0200, Beniamino Galvani wrote:
> Commit 3e0272ca00ce ("nl80211: Re-read MAC address on RTM_NEWLINK")
> added the detection of external changes to MAC address when the
> interface is brought up.
> If the interface state is changed quickly enough, wpa_supplicant may
> receive the netlink message for the !IFF_UP event when the interface
> has already been brought up and would ignore the next netlink IFF_UP
> message, missing the MAC change.
> Fix this by also reloading the MAC address when a !IFF_UP event is
> received with the interface up, because this implies that the
> interface went down and up again, possibly changing the address.
Jouni Malinen PGP id EFC895FA
More information about the Hostap