System freezes with 4.2.3

[KDE]

after upgrade from 4.1.7 to 4.2.3 system freezed during boot,
can't get any backtrace
it seems it is caused by bug which on non-grsec kernel is causing error in syslog
nf_conntrack: table full, dropping packet
which following patch fixed
https://git.kernel.org/cgit/linux/kerne ... 75b537dd0b