[kmod-sched-cake] infrequent kernel crashes and unknown symbol errors

Username: n8v8R

Origin: https://bugs.openwrt.org/index.php?do=details&task_id=2346

Supply the following if possible:

• 19.07

• 4.14.131 armv7l (arm_cortex-a9_vfpv3)

• kmod-sched-cake 4.14.131+2019-03-12-057c7388-1-d7317cbbddf2a7868a9735d59f4d4520.0

during boot time

sch_cake: Unknown symbol nf_conntrack_find_get (err 0)

sch_cake: Unknown symbol nf_ct_get_tuplepr (err 0)

not sure about potential correlation but observing infrequent crashed with what seems to be a common dominator:

• Unable to handle kernel paging request at virtual address

• PC is at nf_conntrack_in+0xdc/0×714 [nf_conntrack]

• debug data/info

opkg list-installed conntrack

conntrack - 2018-05-01-88610abe-1.0 iptables-mod-conntrack-extra - 1.8.2-3.51 kmod-ipt-conntrack - 4.14.131-1-d7317cbbddf2a7868a9735d59f4d4520.0 kmod-ipt-conntrack-extra - 4.14.131-1-d7317cbbddf2a7868a9735d59f4d4520.0 kmod-nf-conntrack - 4.14.131-1-d7317cbbddf2a7868a9735d59f4d4520.0 kmod-nf-conntrack-netlink - 4.14.131-1-d7317cbbddf2a7868a9735d59f4d4520.0 kmod-nf-conntrack6 - 4.14.131-1-d7317cbbddf2a7868a9735d59f4d4520.0 libnetfilter-conntrack - 2018-05-01-3ccae9f5-2.0

sysctl -a | grep track → output attached

crash logs → attached