OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Kernel
  • Assigned To No-one
  • Operating System All
  • Severity Medium
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Russell Senior - 30.08.2016

FS#126 - kernel panic on brcm47xx (netgear wgt634u) when routing at a high speed

With LEDE version reboot-1444-g1bb914d, when pulling data through the WAN interface to the LAN interface at a sufficiently high speed, e.g. on a Raspberry Pi connected by ethernet to a LAN port, and the WAN interface connected to a gigabit internet service and issuing a command like:

curl https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.7.2.tar.xz > /dev/null

From the pi, I see something like:

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  9 86.2M    9 7977k    0     0  1834k      0  0:00:48  0:00:04  0:00:44 1835k[  352.295252] smsc95xx 1-1.1:1.0 eth0: link down
  9 86.2M    9 7977k    0     0  1255k      0  0:01:10  0:00:06  0:01:04 1155k[  353.959380] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
  9 86.2M    9 7977k    0     0  43292      0  0:34:48  0:03:08  0:31:40     0

or

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  8 86.2M    8 7440k    0     0  1478k      0  0:00:59  0:00:05  0:00:54 1478k[ 1100.164849] smsc95xx 1-1.1:1.0 eth0: link down
  8 86.2M    8 7440k    0     0  1232k      0  0:01:11  0:00:06  0:01:05 1300k[ 1101.836954] smsc95xx 1-1.1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
  8 86.2M    8 7440k    0     0   740k      0  0:01:59  0:00:10  0:01:49     0

Where the “link down” is the WGT634U panic’ing and rebooting. The panic on the WGT634U looks like this:

[  171.966841] CPU 0 Unable to handle kernel paging request at virtual address 008224d8, epc == 80077ecc, ra == 801d8100
[  171.977700] Oops[#1]:
[  171.980093] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.1.20 #0
[  171.986265] task: 8181e008 ti: 8182a000 task.ti: 8182a000
[  171.991711] $ 0   : 00000000 1000b800 008224d8 b41c479b
[  171.997140] $ 4   : 008224d8 00010000 80361ef8 00000000
[  172.002557] $ 8   : 81018b14 8101da14 00100100 dceb27b8
[  172.007983] $12   : ffffffff 00000001 ffffff80 000042c6
[  172.013400] $16   : b41c479b 00000001 81b450a8 81b7d260
[  172.018817] $20   : 803b5dcc 00000002 00000008 0000000a
[  172.024235] $24   : 00000000 80072b24                  
[  172.029653] $28   : 8182a000 8182bdb8 00000100 801d8100
[  172.035083] Hi    : 00000000
[  172.038026] Lo    : 0000006c
[  172.041036] epc   : 80077ecc put_compound_page+0x78/0x240
[  172.046547] ra    : 801d8100 skb_release_data+0xa8/0x10c
[  172.051920] Status: 1000b803 KERNEL EXL IE 
[  172.056254] Cause : 00800008
[  172.059194] BadVA : 008224d8
[  172.062144] PrId  : 00029007 (Broadcom BMIPS3300)
[  172.066891] Modules linked in: pppoe ppp_async iptable_nat ath5k ath pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_raw iptable_mangle iptable_filter ip_tables crc_ccitt compat ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables leds_gpio ehci_platform ehci_hcd gpio_button_hotplug usbcore nls_base usb_common ssb_hcd
[  172.132913] Process ksoftirqd/0 (pid: 3, threadinfo=8182a000, task=8181e008, tls=00000000)
[  172.141213] Stack : 1000b803 00000000 0000006c b41c479b 81b45080 801d8100 00000000 0000012c
          00000001 801e7d60 81becb60 81b7d260 81b7d260 80335b3c 81bece60 801d818c
          80360000 803623e0 81becb60 80335b3c 803623e0 801e63d8 8182be10 8182be10
          00000001 00000002 803b5dd0 00000001 803b5dd4 00000003 803b0000 80024fec
          81841048 80361100 819bb770 80007664 80364510 8181e008 80362898 04208040
          ...
[  172.178058] Call Trace:
[  172.180640] [<80077ecc>] put_compound_page+0x78/0x240
[  172.185822] [<801d8100>] skb_release_data+0xa8/0x10c
[  172.190895] [<801d818c>] __kfree_skb+0x28/0xb4
[  172.195466] [<801e63d8>] net_tx_action+0xd8/0x140
[  172.200329] [<80024fec>] __do_softirq+0x184/0x2b0
[  172.205184] [<80025140>] run_ksoftirqd+0x28/0x80
[  172.209953] [<8003bae0>] smpboot_thread_fn+0x148/0x178
[  172.215246] [<80039390>] kthread+0xdc/0xe8
[  172.219459] [<800010a8>] ret_from_kernel_thread+0x14/0x1c
[  172.224921] 
[  172.226470] 
Code: 30840001  0204100a  00402021 <8c420000> 000211c2  30420001  10400018  00000000  8e020000 
[  172.237022] ---[ end trace 89a3318b662df6d8 ]---
[  172.250536] Kernel panic - not syncing: Fatal exception in interrupt
[  172.262338] Rebooting in 3 seconds..

or

[ 1317.958261] Unhandled kernel unaligned access[#1]:
[ 1317.963173] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.1.20 #0
[ 1317.969349] task: 8181e008 ti: 8182a000 task.ti: 8182a000
[ 1317.974795] $ 0   : 00000000 1000b801 00000001 00200000
[ 1317.980232] $ 4   : 647b394a 00010000 00018da4 00000000
[ 1317.985658] $ 8   : 8181e040 b1e1b104 00000017 40000000
[ 1317.991085] $12   : 500018dd 00000000 00000000 010102f2
[ 1317.996510] $16   : 80e4d1e0 00000001 80e4d208 81acb0e0
[ 1318.001936] $20   : 803b5dcc 00000002 00000008 0000000a
[ 1318.007362] $24   : 00000010 8001ead0                  
[ 1318.012789] $28   : 8182a000 8182bdd0 00000100 801d8100
[ 1318.018220] Hi    : 00000001
[ 1318.021160] Lo    : 00000001
[ 1318.024169] epc   : 80078474 put_page+0x0/0x4c
[ 1318.028732] ra    : 801d8100 skb_release_data+0xa8/0x10c
[ 1318.034104] Status: 1000b803 KERNEL EXL IE 
[ 1318.038439] Cause : 00800010
[ 1318.041380] BadVA : 647b394a
[ 1318.044330] PrId  : 00029007 (Broadcom BMIPS3300)
[ 1318.049076] Modules linked in: pppoe ppp_async iptable_nat ath5k ath pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_raw iptable_mangle iptable_filter ip_tables crc_ccitt compat ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables leds_gpio ehci_platform ehci_hcd gpio_button_hotplug usbcore nls_base usb_common ssb_hcd
[ 1318.115124] Process ksoftirqd/0 (pid: 3, threadinfo=8182a000, task=8181e008, tls=00000000)
[ 1318.123424] Stack : 00000000 80c60c94 00db35c0 626a006e ff330000 81acb0e0 81acb0e0 80335b3c
          80c28260 801d818c 80360000 8004f368 00000018 0000000a 803623e0 801e63d8
          8182be10 8182be10 80361100 00000002 803b5dd0 00000001 803b5dd4 00000013
          803b0000 80024fec 80364510 80361100 80360000 8000736c 80364510 8181e008
          80362898 04208040 00018da4 80360000 80310000 803b5dcc 803615a0 803114f4
          ...
[ 1318.160295] Call Trace:
[ 1318.162885] [<80078474>] put_page+0x0/0x4c
[ 1318.167108] [<801d8100>] skb_release_data+0xa8/0x10c
[ 1318.172182] [<801d818c>] __kfree_skb+0x28/0xb4
[ 1318.176752] [<801e63d8>] net_tx_action+0xd8/0x140
[ 1318.181614] [<80024fec>] __do_softirq+0x184/0x2b0
[ 1318.186471] [<80025140>] run_ksoftirqd+0x28/0x80
[ 1318.191238] [<8003bae0>] smpboot_thread_fn+0x148/0x178
[ 1318.196530] [<80039390>] kthread+0xdc/0xe8
[ 1318.200744] [<800010a8>] ret_from_kernel_thread+0x14/0x1c
[ 1318.206200] 
[ 1318.207747] 
Code: 00003021  0801e0ce  24a57888 <8c820000> 3042c000  10400003  00801821  0801df95  00000000 
[ 1318.218397] ---[ end trace 2502a626803fb4b9 ]---
[ 1318.231740] Kernel panic - not syncing: Fatal exception in interrupt
[ 1318.243362] Rebooting in 3 seconds..

This looks similar to: https://dev.openwrt.org/ticket/11091

Russell Senior commented on 30.08.2016 09:15
$ scripts/diffconfig.sh 
CONFIG_TARGET_brcm47xx=y
CONFIG_TARGET_brcm47xx_legacy=y
CONFIG_TARGET_brcm47xx_legacy_WGT634U=y
CONFIG_DEVEL=y
CONFIG_KERNEL_KALLSYMS=y

I turned off the stock firewall, and used a minimal masquerade rule in its place:

/etc/init.d/firewall disable
/etc/init.d/firewall stop
iptables -v -t nat -I POSTROUTING -o eth0.2 -j MASQUERADE
Russell Senior commented on 31.08.2016 00:32

I tried installing my oldest OpenWrt build for WGT634U, a KAMIKAZE r12893, kernel 2.6.25.17, built 2008-10-09, and it panics under the same test conditions. The trace lacks kernel symbols, so it's probably not worth pasting, but this implies it is not new behavior, just that upstream bandwidth has increased to the point the problem is more visible these days.

Project Manager
Baptiste Jonglez commented on 12.02.2017 15:01

Does the problem still exist with 17.01-rc2?

Adam Chasen commented on 02.07.2017 23:37

Seeing similar behavior. Can reliably reproduce when using dslreports speedtest. Reproduced on multiple wgt634u devices. I can send a spare device to someone if it would help. Alternatively, can someone point me to how to get a useful backtrace? I am familiar with custom openwrt builds and kernel builds.

Russell Senior commented on 10.12.2017 10:18

FWIW, as of OpenWrt SNAPSHOT, r5484-69d22a6bf6, I managed to get through an entire tarball, 96.1MB in 44 seconds, on the order of 20Mbps, with no panic.

Michal Krčmárik commented on 29.03.2019 07:57

Hello.

I have a similar problem.

My patient: OpenWrt 18.06.2, r7676-cddd7b4c77 on the wgt634u router.

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 OpenWrt 18.06.2, r7676-cddd7b4c77
 -----------------------------------------------------

I want to report two issues:

1. Low throughput WAN - LAN and high CPU load

Throughput Test topology:

(iperf3 server) <----> ([WAN] WGT634u [LAN]) <----> (iperf3 client)

CPU load (sirq, ksoftirqd):


Mem: 13084K used, 14724K free, 68K shrd, 1180K buff, 4516K cached
CPU:   1% usr   1% sys   0% nic   0% idle   0% io   0% irq  97% sirq
Load average: 0.27 0.16 0.12 2/32 1233
  PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
    7     2 root     RW       0   0%  92% [ksoftirqd/0]
  114     2 root     IW       0   0%   5% [kworker/0:1]
 1233  1225 root     R     1352   5%   1% top

Result:

- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.01  sec  23.6 MBytes  19.8 Mbits/sec    0             sender
[  4]   0.00-10.01  sec  23.3 MBytes  19.5 Mbits/sec                  receiver

2. Immediate crasch and restart of the router in more simultaneous conections

Repeat test iperf3 with 5 simultaneous connections:

iperf3 -c 192.168.1.26 -P 5

Result:

iperf3 -c 192.168.1.26 -P 5
Connecting to host 192.168.1.26, port 5201
[  4] local 192.168.100.102 port 56168 connected to 192.168.1.26 port 5201
[  6] local 192.168.100.102 port 56169 connected to 192.168.1.26 port 5201
[  8] local 192.168.100.102 port 56170 connected to 192.168.1.26 port 5201
[ 10] local 192.168.100.102 port 56171 connected to 192.168.1.26 port 5201
[ 12] local 192.168.100.102 port 56172 connected to 192.168.1.26 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.02   sec   256 KBytes  2.07 Mbits/sec
[  6]   0.00-1.02   sec   256 KBytes  2.07 Mbits/sec
[  8]   0.00-1.02   sec   256 KBytes  2.07 Mbits/sec
[ 10]   0.00-1.02   sec   256 KBytes  2.07 Mbits/sec
[ 12]   0.00-1.02   sec   256 KBytes  2.07 Mbits/sec
[SUM]   0.00-1.02   sec  1.25 MBytes  10.3 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   1.02-2.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   1.02-2.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   1.02-2.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   1.02-2.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   1.02-2.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   1.02-2.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   2.01-3.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   2.01-3.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   2.01-3.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   2.01-3.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   2.01-3.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   2.01-3.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   3.01-4.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   3.01-4.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   3.01-4.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   3.01-4.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   3.01-4.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   3.01-4.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   4.01-5.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   4.01-5.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   4.01-5.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   4.01-5.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   4.01-5.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   4.01-5.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   5.01-6.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   5.01-6.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   5.01-6.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   5.01-6.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   5.01-6.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   5.01-6.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   6.01-7.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   6.01-7.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   6.01-7.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   6.01-7.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   6.01-7.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   6.01-7.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   7.01-8.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   7.01-8.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   7.01-8.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   7.01-8.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   7.01-8.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   7.01-8.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]   8.01-9.01   sec  0.00 Bytes  0.00 bits/sec
[  6]   8.01-9.01   sec  0.00 Bytes  0.00 bits/sec
[  8]   8.01-9.01   sec  0.00 Bytes  0.00 bits/sec
[ 10]   8.01-9.01   sec  0.00 Bytes  0.00 bits/sec
[ 12]   8.01-9.01   sec  0.00 Bytes  0.00 bits/sec
[SUM]   8.01-9.01   sec  0.00 Bytes  0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  4]  10.01-10.33  sec  0.00 Bytes  0.00 bits/sec
[  6]  10.01-10.33  sec  0.00 Bytes  0.00 bits/sec
[  8]  10.01-10.33  sec  0.00 Bytes  0.00 bits/sec
[ 10]  10.01-10.33  sec  0.00 Bytes  0.00 bits/sec
[ 12]  10.01-10.33  sec  0.00 Bytes  0.00 bits/sec
[SUM]  10.01-10.33  sec  0.00 Bytes  0.00 bits/sec

Restart is always and immediately :-/

a piece of crasch log:

<1>[37900.213345] CPU 0 Unable to handle kernel paging request at virtual address 0081db54, epc == 80260ed8, ra == 8026423c
<4>[37900.224225] Oops[#1]:
<4>[37900.226609] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.14.95 #0
<4>[37900.232857] task: 81822100 task.stack: 81840000
<4>[37900.237438] $ 0   : 00000000 10009801 80d563c0 00000008
<4>[37900.242829] $ 4   : 0081db54 80260000 80429ea8 04000000
<4>[37900.248219] $ 8   : 00000005 81841e10 00000001 00000200
<4>[37900.253604] $12   : ffffffff ffffff80 00000000 0040bf1d
<4>[37900.258985] $16   : 00000000 80d563ec 80d563c0 80ca2f00
<4>[37900.264368] $20   : 00000008 00000100 80473f60 80420ea8
<4>[37900.269751] $24   : 00000010 802bcd8c
<4>[37900.275125] $28   : 81840000 81841de8 0000000a 8026423c
<4>[37900.280517] Hi    : f73585e3
<4>[37900.283452] Lo    : 8f0c55c0
<4>[37900.286411] epc   : 80260ed8 0x80260ed8
<4>[37900.290320] ra    : 8026423c 0x8026423c
<4>[37900.294213] Status: 10009803      KERNEL EXL IE
<4>[37900.298500] Cause : 00800008 (ExcCode 02)
<4>[37900.302563] BadVA : 0081db54
<4>[37900.305509] PrId  : 00029007 (Broadcom BMIPS3300)
<4>[37900.310250] Modules linked in: pppoe ppp_async pppox ppp_generic nf_conntrack_ipv6 iptable_nat ipt_REJECT ipt_MASQUERADE 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 ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables leds_gpio gpio_button_hotplug
<4>[37900.367996] Process ksoftirqd/0 (pid: 7, threadinfo=81840000, task=81822100, tls=00000000)
<4>[37900.376285] Stack : 80439280 81841e20 80ca2f00 80260164 80432380 80ca2f00 80ca26c0 803eb268
<4>[37900.384872]         00000008 8026423c 80430000 803eb268 80420000 803eea1c 819c8c88 80ca26c0
<4>[37900.393451]         80439280 80271ef0 80473f64 00000002 0000000e 00000001 00000004 80473f68
<4>[37900.402022]         00000001 00000003 00000002 803a4c90 8041ba90 804209e8 00000000 803a1600
<4>[37900.410593]         8003bef0 803d0000 80470000 00395fd6 80430000 803a96d0 803d0000 04208040
<4>[37900.419173]         ...
<4>[37900.421696] Call Trace:
<4>[37900.421762] [<80260164>] 0x80260164
<4>[37900.427789] [<8026423c>] 0x8026423c
<4>[37900.431367] [<80271ef0>] 0x80271ef0
<4>[37900.434945] [<803a4c90>] 0x803a4c90
<4>[37900.438519] [<803a1600>] 0x803a1600
<4>[37900.442084] [<8003bef0>] 0x8003bef0
<4>[37900.445660] [<8003bef0>] 0x8003bef0
<4>[37900.449232] [<800210e0>] 0x800210e0
<4>[37900.452812] [<8003c058>] 0x8003c058
<4>[37900.456386] [<803a16d0>] 0x803a16d0
<4>[37900.459956] [<80038d00>] 0x80038d00
<4>[37900.463532] [<80038bd4>] 0x80038bd4
<4>[37900.467100] [<80038bd4>] 0x80038bd4
<4>[37900.470669] [<80005688>] 0x80005688
<4>[37900.474240]
<4>[37900.475782] Code: 8fb40020  10000014  00000000 <8c860000> 24a50b08  14c50006  30850001  0c09832f  00000000
<4>[37900.485834]
<4>[37900.487679] ---[ end trace 714900a2d4800499 ]---
Admin
Petr Štetiar commented on 10.04.2019 11:00

I think, that in order to move on with this outstanding issue, you need to reproduce the problem with latest upstream kernel(or at least use minimum of patches on top of upstream kernel) and report the problem upstream to get some help.

Michal Krčmárik commented on 10.04.2019 11:46

Hi,

latest upstream kernel ?

Bug is reproduce with latest stable release 18.06.2 with updates.

Admin
Petr Štetiar commented on 10.04.2019 11:56
latest upstream kernel

Yes

bug is reproduce with latest stable release 18.06.2 with updates

I can see that, but I can't do much about it. The bug was reported 30.08.2016 and still isn't fixed for some reason, so if I were you, I would simply try to reproduce it with latest upstream kernel and ask for help on the appropriate kernel development mailing list.

github_avenger commented on 01.07.2019 17:22

If anyone can send me the spare wgt634u router, I will reproduce and work on this bug. Is this specific to wgt634u? Has anyone observed the issue on other routers?

Thanks.

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