Description: espfix64 is designed to double-fault and recover on failures. This worked great for #GP and #NP, but it didn't work for #SS.
References:
 http://seclists.org/oss-sec/2014/q4/777
Notes:
 willy has made backports for 2.6.32, pending upstream review
Bugs:
upstream: released (3.18-rc6) [6f442be2fb22be02cafa606f1769fa1e6f894441]
2.6.32-upstream-stable: released (2.6.32.65)
sid: released (3.16.7-ckt2-1) [bugfix/x86/x86_64-traps-Stop-using-IST-for-SS.patch]
3.2-wheezy-security: released (3.2.63-2+deb7u2) [bugfix/x86/x86_64-traps-Stop-using-IST-for-SS.patch]
2.6.32-squeeze-security: released (2.6.32-48squeeze9)
3.16-upstream-stable: released (3.16.7-ckt3)
3.2-upstream-stable: released (3.2.65)