#18455: random reboots in TP-LINK 3500
------------------------+---------------------------------------
Reporter: tgayoso@… | Owner: developers
Type: defect | Status: reopened
Priority: normal | Milestone: Chaos Calmer (trunk)
Component: kernel | Version: Trunk
Resolution: | Keywords: unhandled paging requests
------------------------+---------------------------------------
Changes (by pieter.smith@…):
* status: closed => reopened
* resolution: fixed =>
Comment:
Removing this chunk of the patch does reduce the likelihood of the oops
occuring, but it does not really fix the issue. If I remove the chunk, the
issue occurs once a day on our network. If I keep the chunk, the issue is
reproducible with every boot. If I apply r43586, clean and rebuild the
kernel, I still get the following on occasion:
{{{
procd: - init complete -
[ 23.580000] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 23.580000] device eth0 entered promiscuous mode
[ 23.590000] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready
[ 24.660000] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 25.440000] random: nonblocking pool is initialized
[ 25.950000] eth0: link up (100Mbps/Full duplex)
[ 25.950000] br-lan: port 1(eth0) entered forwarding state
[ 25.960000] br-lan: port 1(eth0) entered forwarding state
[ 25.960000] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 25.970000] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
[ 27.960000] br-lan: port 1(eth0) entered forwarding state
[ 88.400000] CPU 0 Unable to handle kernel paging request at virtual
address 60000000, epc == 83300048, ra == 833292f0
[ 88.410000] Oops[#1]:
[ 88.410000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.0 #13
[ 88.410000] task: 803a4e88 ti: 8039e000 task.ti: 8039e000
[ 88.410000] $ 0 : 00000000 00000000 60000000 82f8d480
[ 88.410000] $ 4 : 82f9d050 82cf9300 82f9d000 03000000
[ 88.410000] $ 8 : 00000001 000018e5 82cf9c00 00000000
[ 88.410000] $12 : 00000000 29f31635 00000000 00000000
[ 88.410000] $16 : 82cf9300 82cf9a80 82f8cfc0 82f8d480
[ 88.410000] $20 : 00000000 83386000 00000006 8041d0f8
[ 88.410000] $24 : 00000000 8007d0fc
[ 88.410000] $28 : 8039e000 8039fba8 803bb4ec 833292f0
[ 88.410000] Hi : 00000009
[ 88.410000] Lo : 00000001
[ 88.410000] epc : 83300048 ipv6_opt_accepted+0x48/0xbc [ipv6]
[ 88.410000] Not tainted
[ 88.410000] ra : 833292f0 ipv6_frag_exit+0x1b80/0x2f48 [ipv6]
[ 88.410000] Status: 1000fc03 KERNEL EXL IE
[ 88.410000] Cause : 00800008
[ 88.410000] BadVA : 60000000
[ 88.410000] PrId : 00019374 (MIPS 24Kc)
[ 88.410000] Modules linked in: ath9k ath9k_common pppoe ppp_async
iptable_nat ath9k_hw ath pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv4
mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat
xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comh
[ 88.410000] Process swapper (pid: 0, threadinfo=8039e000,
task=803a4e88, tls=00000000)
[ 88.410000] Stack : 82cf9a80 82f28000 00000601 8039fc28 8039fbc0
803a1a30 8026e2d8 8026e2a0
00000000 80275ac4 803a11c0 82cf9a80 82f8cfc0 00000000 803b9d50
82f9d050
0000eaf7 8332970c 82cf9a80 00000001 803a1a30 0000000a 00000000
802a1280
833056f0 80000000 803a1a28 82cf9a80 00000035 8039fc28 82cf9a80
82f62000
83335be0 00000006 fffffffe 803a2a0c 30000000 20000000 00000006
833058c4
...
[ 88.410000] Call Trace:
[ 88.410000] [<83300048>] ipv6_opt_accepted+0x48/0xbc [ipv6]
[ 88.410000] [<833292f0>] ipv6_frag_exit+0x1b80/0x2f48 [ipv6]
[ 88.410000]
[ 88.410000]
Code: 00c42021 88820000 98820003 <88440000> 98440003 7c84d800 10800005
00000000 8c620040
[ 88.650000] ---[ end trace ec68717a9ff185b1 ]---
[ 88.660000] Kernel panic - not syncing: Fatal exception in interrupt
[ 88.660000] Rebooting in 3 seconds..
}}}
If I don't apply r43586, the oops is reproducible on our network on every
boot.
--
Ticket URL: <https://dev.openwrt.org/ticket/18455#comment:18>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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