OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Amish Vishwakarma - 30.08.2021

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

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] [<801651ac>] kmem_cache_alloc+0xb4/0x2bc
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.851328] [<86142864>] nf_ct_iterate_destroy+0×840/0x9ac [nf_conntrack]
Mon Aug 30 15:37:34 2021 kern.warn kernel: [ 5483.858101] Code: 00000000 8e020014 02821021 <8c480000> 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

Amish Vishwakarma commented on 31.08.2021 08:41

This is a reproducible

Current interfaces

  • PPPoE: WAN (ISP modem in Bridge mode)
  • Modem Monitor: WAN (to monitor bridged modem, ip 192.168.2.2/24)

static route 192.168.2.0/24 via 192.168.2.1

  • DHCP internet on lan4 (192.168.209.xx/24)

Step to reproduce: remove the internet cable to the ISP modem (do not remove cable connecting WAN and ISP modem) and wait for the device to crash

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