infrequent crashes - Unable to handle kernel paging request at virtual address
{"kernel":"4.14.131","hostname":"to","system":"ARMv7 Processor rev 1 (v7l)","model":"Turris Omnia","board_name":"cznic,turris-omnia","release":{"distribution":"TurrisOS","version":"5.0-dev","revision":"202260a","target":"mvebu/cortexa9","description":"TurrisOS 5.0-dev 202260a"}}
Observing infrequent crashes crash_log_1 crash_log_2 crash_log_3
, cannot reproduce at will, different taints but with what seems to be a common theme:
Unable to handle kernel paging request at virtual address
nf_conntrack_in+0xdc/0x714 [nf_conntrack]
sysctl -a | grep track
conntrack_kernel_parameters
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
lsmod | grep sch_cake
nf_conntrack 77824 31 sch_cake,ipt_MASQUERADE,xt_state,xt_nat,xt_helper,xt_conntrack,xt_connmark,xt_connlimit,xt_connbytes,xt_REDIRECT,xt_CT,nft_redir_ipv6,nft_redir_ipv4,nft_redir,nft_nat,nft_masq_ipv6,nft_masq_ipv4,nft_masq,nft_flow_offload,nft_ct,nf_nat_masquerade_ipv6,nf_nat_masquerade_ipv4,nf_conntrack_ipv6,nf_nat_ipv6,nf_conntrack_ipv4,nf_nat_ipv4,nf_nat_ftp,nf_nat,nf_flow_table,nf_conntrack_rtcache,nf_conntrack_ftp
sch_cake 36864 0
tc -s qdisc
tc
maybe relates to what is displayed during boot
sch_cake: Unknown symbol nf_conntrack_find_get (err 0)
sch_cake: Unknown symbol nf_ct_get_tuplepr (err 0)
and a while later the log showing
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead.
probably no correlation with https://gitlab.labs.nic.cz/turris/turris-build/issues/35
lodged with upstream https://bugs.openwrt.org/index.php?do=details&task_id=2346