[FS#3760] Wifi to WAN traffic causes eth0 to crash with a NETDEV WATCHDOG

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Sat May 1 03:48:42 BST 2021


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FS#3760 - Wifi to WAN traffic causes eth0 to crash with a NETDEV WATCHDOG
User who did this - Steven Johnson (stevenj)

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I just build from master with a 5.10.32 kernel and the problem persists:


Sat May  1 02:38:18 2021 kern.warn kernel: [  304.135261] ------------[ cut here ]------------
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.139934] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:443 dev_watchdog+0x2fc/0x304
Sat May  1 02:38:18 2021 kern.info kernel: [  304.148205] NETDEV WATCHDOG: eth0 (mtk_soc_eth): transmit queue 0 timed out
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.155132] Modules linked in: pppoe ppp_async iptable_nat xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD pppox ppp_generic nf_nat nf_flow_table nf_conntrack mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 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 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_mtk xhci_hcd gpio_button_hotplug usbcore nls_base usb_common
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.215126] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.32 #0
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.221147] Stack : 8072aa08 ffffffff 80830000 80082648 80830000 8072b958 00000000 00000000
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.229518]         8140bdac 80980000 807bf2a8 807bedc7 806fa7cc 00000001 8140bd50 8fe23c7d
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.237866]         00000000 00000000 806fa7cc 8140bbf0 ffffefff 80828764 00000000 00000000
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.246212]         00000000 0000000e 00000000 00034856 00000000 80830000 00000000 80700000
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.254556]         00000009 ffffffff 00000122 ffffffff 00000018 803db974 00000000 80980000
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.262899]         ...
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.265343] Call Trace:
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.267810] [] show_stack+0x30/0x100
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.272251] [] dump_stack+0xa4/0xe0
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.276643] [] __warn+0xc0/0xe8
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.280646] [] warn_slowpath_fmt+0x8c/0xac
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.285605] [] dev_watchdog+0x2fc/0x304
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.290317] [] call_timer_fn.isra.30+0x20/0x90
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.295607] [] run_timer_softirq+0x220/0x4c8
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.300740] [] __do_softirq+0x16c/0x334
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.305426] [] irq_exit+0xc4/0xec
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.309592] [] plat_irq_dispatch+0x64/0x104
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.314621] [] except_vec_vi_end+0xb8/0xc4
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.319576] [] cpuidle_enter_state_coupled+0x3b0/0x500
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.325558] [] cpuidle_enter+0x54/0xac
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.330182] [] do_idle+0x25c/0x2cc
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.334432] [] cpu_startup_entry+0x2c/0x34
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.339383] [] start_kernel+0x5bc/0x5e4
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.344068]
Sat May  1 02:38:18 2021 kern.warn kernel: [  304.345968] ---[ end trace 67930318eb59ae3a ]---
Sat May  1 02:38:18 2021 kern.err kernel: [  304.350623] mtk_soc_eth 1e100000.ethernet eth0: transmit timed out
Sat May  1 02:38:18 2021 kern.info kernel: [  304.357732] mtk_soc_eth 1e100000.ethernet eth0: Link is Down

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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3760#comment9593

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