mcproxy kernel warning in syslog of the openwrt router

[shar...@t-online.de]

Hi all,
i have compile mcproxy of the openwrt router. In the syslog I see the folling warnings:

Code hier Dec  2 22:06:02 rome01.harnet.de kernel: [   51.667518] ------------[ cut here ]------------
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.672277] WARNING: CPU: 0 PID: 3129 at net/netfilter/nf_conntrack_rtcache.c:199 0xffffffffa03cd365()
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.681765] Modules linked in: pppoe ppp_async iptable_nat ath9k pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 iwlmvm iwldvm ipt_REJECT ipt_MASQUERADE ath9k_htc ath9k_common xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_id xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_DSCP xt_CT xt_CLASS
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.795068] CPU: 0 PID: 3129 Comm: mcproxy Not tainted 4.4.14 #21
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.801176] Hardware name: PC Engines APU/APU, BIOS 4.0 07/08/2014
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.807373]  0000000000000000 ffffffff811faab2 0000000000000000 ffffffffa03cd520
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.814883]  ffffffff810452b8 ffff8800d73f7c40 0000000000000002 ffff8800d896db00
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.822396]  ffffffff81689298 ffff8800d8ca3000 ffffffffa03cd365 ffff8800d73f7c40
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.829910] Call Trace:
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.832389]  [<ffffffff811faab2>] ? dump_stack+0x5c/0x7a
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.837722]  [<ffffffff810452b8>] ? warn_slowpath_common+0x78/0xb0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.843916]  [<ffffffffa03cd365>] ? 0xffffffffa03cd365
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.849077]  [<ffffffff813c03a4>] ? nf_iterate+0x54/0x60
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.854402]  [<ffffffff813c0408>] ? nf_hook_slow+0x58/0xb0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.859901]  [<ffffffff81407178>] ? ipmr_queue_xmit.isra.4.constprop.13+0x248/0x4e0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.867575]  [<ffffffff81405530>] ? ipmr_cache_find_any+0xa0/0xa0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.873680]  [<ffffffff81407d11>] ? ip_mroute_setsockopt+0x631/0x6c0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.880051]  [<ffffffff813cc88a>] ? do_ip_setsockopt.isra.4+0xaa/0xd10
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.886594]  [<ffffffff81383e1d>] ? skb_dequeue+0x4d/0x60
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.892013]  [<ffffffff813875d6>] ? skb_queue_purge+0x16/0x20
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.897782]  [<ffffffff8112bbff>] ? __inode_wait_for_writeback+0x5f/0xa0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.904494]  [<ffffffff81073dd0>] ? autoremove_wake_function+0x30/0x30
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.911037]  [<ffffffff8111a61f>] ? __dentry_kill+0x12f/0x1d0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.916799]  [<ffffffff813cd512>] ? ip_setsockopt+0x22/0x90
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.922387]  [<ffffffff8137fd57>] ? SyS_setsockopt+0x57/0xb0
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.928063]  [<ffffffff8146446e>] ? entry_SYSCALL_64_fastpath+0x12/0x71
Dec  2 22:06:02 rome01.harnet.de kernel: [   51.935525] ---[ end trace 28ce2afaac666d45 ]---eingeben...

Firmware Version:

OpenWrt Designated Driver 49871 / LuCI Master (git-16.211.48508-f9e5d11)

Kernel Version:

4.4.14

Is the warning message critical?

Kind regards, Stefan Harbich

[Sebastian Woelke]

Hi Stefan,

I cannot tell if the warning is critical or not.
Mcproxy simply uses the socket API, if this API crashes I would suggest to use a different kernel version (older or newer).

Thats all I can help your here at the moment.

Kind regards,
Sebastian