[FS#3997] Kernel panic with the latest snapshot for RAMIPS -TP Link Archer C6v3

Mon Aug 30 03:23:03 PDT 2021

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A new Flyspray task has been opened.  Details are below. 

User who did this - Amish Vishwakarma (amishv) 

Attached to Project - OpenWrt/LEDE Project
Summary - Kernel panic with the latest snapshot for RAMIPS -TP Link Archer C6v3
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on
   TP Link Archer C6v3 (RAMIPS, MediaTek MT7621 ver:1 eco:3)

 - Software versions of OpenWrt/LEDE release, packages, etc.
   OpenWrt SNAPSHOT r17444-1c8214d6f2 / LuCI Master git-21.226.86205-376af36OpenWrt SNAPSHOT r17444-1c8214d6f2 / LuCI Master git-21.226.86205-376af36
   MWAN3 with one PPPoe and one DHCP internet connection

 - Steps to reproduce

   Unclear, mostly occuring during the PPPoE failure.

Logs captured (logread -f ) over ssh.

-----------------------------------------------------

 Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.602160] Unhandled kernel unaligned access[#1]:
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.606975] CPU: 1 PID: 7862 Comm: sh Not tainted 5.4.142 #0
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.612621] $ 0   : 00000000 00000001 000000d7 ff7d5ab4
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.617846] $ 4   : 807983c4 00000a20 00000001 ff7d5ab0
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.623071] $ 8   : 00000028 0001b8ef 00000000 00000000
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.628291] $12   : 00000000 ffffffff 006e6177 00000000
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.633509] $16   : 86f99000 00000a20 86142864 80920000
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.638729] $20   : 00000007 a4421d03 807983c4 00000014
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.643948] $24   : 84d1da90 861581c0
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.649167] $28   : 86026000 87c0fa98 80790000 80165134
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.654388] Hi    : 00000522
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.657258] Lo    : 10e81800
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.660151] epc   : 801651ac kmem_cache_alloc+0xb4/0x2bc
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.665445] ra    : 80165134 kmem_cache_alloc+0x3c/0x2bc
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.670731] Status: 11007c03	KERNEL EXL IE
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.674906] Cause : 40800010 (ExcCode 04)
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.678895] BadVA : 000000d7
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.681761] PrId  : 0001992f (MIPS 1004Kc)
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.685836] Modules linked in: xt_connlimit pppoe ppp_async nf_conncount iptable_nat xt_state xt_nat xt_helper xt_conntrack xt_connmark xt_connbytes xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD xt_CT pppox ppp_generic nf_nat nf_flow_table_hw nf_flow_table nf_conntrack mt7615e mt7615_common mt7603e mt76_connac_lib mt76 mac80211 ipt_REJECT cfg80211 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_recent xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_ecn xt_dscp xt_comment xt_TCPMSS xt_LOG xt_HL xt_DSCP xt_CLASSIFY slhc nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 iptable_raw iptable_mangle iptable_filter ipt_ECN ip_tables hwmon crc_ccitt compat xt_set ip_set_list_set ip_set_hash_netportnet ip_set_hash_netport ip_set_hash_netnet ip_set_hash_netiface ip_set_hash_net ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink nf_log_ipv6 nf_log_common
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.686087]  ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 sha256_generic libsha256 seqiv jitterentropy_rng drbg hmac ghash_generic gf128mul gcm ctr cmac ccm leds_gpio gpio_button_hotplug
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.792066] Process sh (pid: 7862, threadinfo=73a4a26f, task=9335e5f1, tls=77ec5f0c)
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.799771] Stack : 00000014 00000000 00000028 00000000 856b0540 87c0fb0c 87c0fb94 807b24c0
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.808104]         8073da90 86142864 00000000 ffffffff 006e6177 00000000 00000001 856b0540
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.816439]         00000000 87c0fb94 807b24c0 80790000 8073da90 86142a90 84d1da90 861581c0
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.824773]         2a82742e 804805ec 00000a20 a4421d03 80790000 ba14a8c0 00000000 00000000
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.833106]         00000000 000210f4 c90aa8c0 00000000 00000000 00000000 0106bb01 5f74e357
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.841439]         ...
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.843877] Call Trace:
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.846327] [] kmem_cache_alloc+0xb4/0x2bc
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.851328] [] nf_ct_iterate_destroy+0x840/0x9ac [nf_conntrack]
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.858101] Code: 00000000  8e020014  02821021  41676000  30e70001  000000c0  8f85000c  8e030000
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.867830]
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.869575] ---[ end trace 2f7cb28aa31f5cce ]---
Mon Aug 30 15:37:34 2021 kern.emerg kernel: [ 5483.874244] Kernel panic - not syncing: Fatal exception in interrupt

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3997

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