Any idea, what this means? Someone with similar issues?
This is a Fritz!Box 4040.
kern.warn kernel: [138621.348327] ------------[ cut here ]------------
kern.warn kernel: [138621.348469] WARNING: CPU: 0 PID: 9 at include/net/dst.h:228 nf_rtcache_forward4+0x164/0x1a0 [nf_conntrack_rtcache]
kern.warn kernel: [138621.352094] Modules linked in: pppoe ppp_async iptable_nat ath10k_pci ath10k_core ath xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD pppox ppp_generic nf_nat nf_flow_table_hw nf_flow_table nf_conntrack_rtcache nf_conntrack mac80211 ipt_REJECT cfg80211 xt_time xt_tcpudp xt_multiport xt_mark xt_mac xt_limit xt_comment xt_TCPMSS xt_LOG slhc nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_filter ip_tables hwmon crc_ccitt compat 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_qcom gpio_button_hotplug
kern.warn kernel: [138621.398451] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G W 5.4.72 #0
kern.warn kernel: [138621.420619] Hardware name: Generic DT based system
kern.warn kernel: [138621.428106] [<c030e544>] (unwind_backtrace) from [<c030afc0>] (show_stack+0x10/0x14)
kern.warn kernel: [138621.432872] [<c030afc0>] (show_stack) from [<c083d458>] (dump_stack+0x94/0xa8)
kern.warn kernel: [138621.440855] [<c083d458>] (dump_stack) from [<c032130c>] (__warn+0xbc/0xd8)
kern.warn kernel: [138621.447968] [<c032130c>] (__warn) from [<c0321378>] (warn_slowpath_fmt+0x50/0x94)
kern.warn kernel: [138621.454925] [<c0321378>] (warn_slowpath_fmt) from [<bf229230>] (nf_rtcache_forward4+0x164/0x1a0 [nf_conntrack_rtcache])
kern.warn kernel: [138621.462567] [<bf229230>] (nf_rtcache_forward4 [nf_conntrack_rtcache]) from [<c0765814>] (nf_hook_slow+0x38/0xb4)
kern.warn kernel: [138621.473585] [<c0765814>] (nf_hook_slow) from [<c076eec0>] (ip_forward+0x318/0x394)
kern.warn kernel: [138621.483736] [<c076eec0>] (ip_forward) from [<c076d36c>] (ip_sublist_rcv_finish+0x44/0x5c)
kern.warn kernel: [138621.491203] [<c076d36c>] (ip_sublist_rcv_finish) from [<c076d7d0>] (ip_sublist_rcv+0x190/0x1d0)
kern.warn kernel: [138621.499536] [<c076d7d0>] (ip_sublist_rcv) from [<c076de9c>] (ip_list_rcv+0xd4/0xe4)
kern.warn kernel: [138621.508479] [<c076de9c>] (ip_list_rcv) from [<c071f988>] (__netif_receive_skb_list_core+0x190/0x1f0)
kern.warn kernel: [138621.516205] [<c071f988>] (__netif_receive_skb_list_core) from [<c071fb9c>] (netif_receive_skb_list_internal+0x1b4/0x290)
kern.warn kernel: [138621.525321] [<c071fb9c>] (netif_receive_skb_list_internal) from [<c071fc9c>] (gro_normal_list.part.42+0x14/0x28)
kern.warn kernel: [138621.536257] [<c071fc9c>] (gro_normal_list.part.42) from [<c0720880>] (napi_complete_done+0x13c/0x1b0)
kern.warn kernel: [138621.546500] [<c0720880>] (napi_complete_done) from [<c068a034>] (edma_poll+0x398/0xef4)
kern.warn kernel: [138621.555700] [<c068a034>] (edma_poll) from [<c072091c>] (__napi_poll+0x28/0x104)
kern.warn kernel: [138621.563942] [<c072091c>] (__napi_poll) from [<c0720b84>] (net_rx_action+0xf8/0x284)
kern.warn kernel: [138621.571324] [<c0720b84>] (net_rx_action) from [<c0302288>] (__do_softirq+0x120/0x2b0)
kern.warn kernel: [138621.579050] [<c0302288>] (__do_softirq) from [<c032502c>] (run_ksoftirqd+0x2c/0x38)
kern.warn kernel: [138621.586776] [<c032502c>] (run_ksoftirqd) from [<c0340f34>] (smpboot_thread_fn+0xec/0x1a4)
kern.warn kernel: [138621.594675] [<c0340f34>] (smpboot_thread_fn) from [<c033df78>] (kthread+0x14c/0x150)
kern.warn kernel: [138621.602745] [<c033df78>] (kthread) from [<c03010e8>] (ret_from_fork+0x14/0x2c)
kern.warn kernel: [138621.610637] Exception stack(0xcf857fb0 to 0xcf857ff8)
kern.warn kernel: [138621.617755] 7fa0: 00000000 00000000 00000000 00000000
kern.warn kernel: [138621.622971] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
kern.warn kernel: [138621.631214] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
kern.warn kernel: [138621.639511] ---[ end trace 8aa671b3597a87f9 ]---
kern.warn kernel: [138621.647381] dst_release: dst:7076c5b6 refcnt:-1
The next message is also very interesting:
Fri Nov 6 06:37:08 2020 daemon.info olsrd[936]: detected duplicate packet with seqnr 0x6835 from 10.36.166.129 on eth0.10 (1464 Bytes)