Archer c2600 Kernel Message - What does it mean?

From the kernel log - any ideas what this means? And more importantly, is there anything to be done to avoid this issue?

[472537.739861] ------------[ cut here ]------------
[472537.739931] WARNING: CPU: 1 PID: 1520 at backports-4.19.161-1/net/wireless/util.c:1147 0xbf1e5d88 [cfg80211@bf1e1000+0x37000]
[472537.743621] invalid rate bw=0, mcs=15, nss=4
[472537.754945] Modules linked in: pppoe ppp_async ath10k_pci ath10k_core ath pppox ppp_generic nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_FLOWOFFLOAD xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_ccitt compat ledtrig_usbport nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 leds_gpio xhci_plat_hcd xhci_pci xhci_hcd dwc3 dwc3_of_simple ohci_platform ohci_hcd phy_qcom_dwc3 ahci ehci_platform
[472537.808159]  sd_mod ahci_platform libahci_platform libahci libata scsi_mod ehci_hcd gpio_button_hotplug
[472537.830074] CPU: 1 PID: 1520 Comm: hostapd Not tainted 4.14.215 #0
[472537.839572] Hardware name: Generic DT based system
[472537.845563] Function entered at [<c030f1c4>] from [<c030b390>]
[472537.850418] Function entered at [<c030b390>] from [<c07c2844>]
[472537.856322] Function entered at [<c07c2844>] from [<c031f91c>]
[472537.862226] Function entered at [<c031f91c>] from [<c031f97c>]
[472537.868127] Function entered at [<c031f97c>] from [<bf1e5d88>]
[472537.874077] Function entered at [<bf1e5d88>] from [<bf1f387c>]
[472537.879942] Function entered at [<bf1f387c>] from [<bf2006b8>]
[472537.885842] Function entered at [<bf2006b8>] from [<bf2010b0>]
[472537.891742] Function entered at [<bf2010b0>] from [<c06e33d4>]
[472537.897644] Function entered at [<c06e33d4>] from [<c06e1d78>]
[472537.903544] Function entered at [<c06e1d78>] from [<c06e23c8>]
[472537.909447] Function entered at [<c06e23c8>] from [<c06e1588>]
[472537.915349] Function entered at [<c06e1588>] from [<c06e19a4>]
[472537.921253] Function entered at [<c06e19a4>] from [<c068b7e8>]
[472537.927157] Function entered at [<c068b7e8>] from [<c068c050>]
[472537.933057] Function entered at [<c068c050>] from [<c0307b60>]
[472537.939097] ---[ end trace 47de6c469bac06fb ]---

Usually when I find one of those messages in my log, it means one of my Wireless clients is connected but the traffic is completely blocked. Not always, but it's usually a sign that I need to restart the wifi interfaces to prevent issues.

Thanks ergamus. Other than restarting, which is usually a solution, do you know the cause or permanent fix to avoid this?

The other day I did have a problem with my wifi connecting and this must have been the problem.

Sorry, I had no luck figuring out how to avoid this issue. All I was able to figure out is that certain devices are more likely to trigger this bug, and it usually happens after a long time or with a lot of traffic coming through.

WDS for example is a complete disaster in terms of stability.

I haven't really tested the future release of OpenWRT on my C2600. It's possible this might have been fixed already, who knows.

Also, if your C2600 keeps restarting at random times, see this thread:

1 Like

Thanks for the info.

I've had my C2600 for over 2 years and think I've been running it on<17.0 OpenWRT firmware. I can honestly say I've never had any significant problems up until recently. I am on the current version 19.07.6, so it doesn't appear to be fixed with the recent update. Anyway, that was mostly a dnsmasq security update.