Scientific Linux Security Update : openafs on SL41-45 i386/x86_64

In pthread-aware fileservers, the 'hostglock' pthread lock, accessed via the HLOCK and HUNLOCK macros, is used to provide safe access to host structures. This lock is required to be held when updating information pertaining to a host. The RPC handler for the GiveUpAllCallBacks RPC did not hold th...