Hi,
I am trying to upgrade kernel 4.11.8 to 4.12.3 (it is a nat/router,
handling approx 2gbps of pppoe users traffic) and noticed that after
while server rebooting(i have set reboot on panic and etc).
I can't run serial console, and in pstore / netconsole there is nothing.
Best i got is some very short message about softlockup in ipmi, but as
storage very limited there - it is near useless.
By preliminary testing (can't do it much, as it's production) - it seems
following lines causing issue, they worked in 4.11.8 and no more in
4.12.3.
iptables -t raw -A PREROUTING -p tcp -m tcp --dport 1723 -j CT --helper
pptp
iptables -t raw -A PREROUTING -p tcp -m tcp --sport 1723 -j CT --helper
pptp
(there is no solid examples for helpers, not sure second line is
necessary)
I will try to do more tests tonight (lockdep debug and etc), but maybe
someone have idea what might be wrong?
