pmksa_cache not thread-safe ?

[Sergey Korolew]

Hello !

I have several access points with OpenWrt and hostapd-2014-06-03. After enabling pmksa_caching in config
access points entered 100% CPU utilisation after some time (and several clients). CPU consumed by
hostapd process. I found many other user's reports about this problem, for example
https://dev.openwrt.org/ticket/16470

Quick looking on the pmksa_cache_auth.c found what its totally non-threadsafe and full of possible
eternal loops if accessed simultaneosly :) for example in functions pmksa_cache_free_entry() and
pmksa_cache_link_entry() chain can be damaged and looped forever.

It is possible to add some locking ?


-- 
 Sergey                          mailto:ds at bittu.org.ru