** Changed in: linux-raspi2 (Ubuntu)
Status: Incomplete => Won't Fix
** Changed in: linux-raspi (Ubuntu)
Status: Incomplete => Invalid
** Changed in: linux-raspi (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1861936
Title:
Raspberry Pi 3 network dies shortly after a burst of IPv6 tunnel
network load ((lan78xx): transmit queue 0 timed out)
Status in linux-raspi package in Ubuntu:
Invalid
Status in linux-raspi2 package in Ubuntu:
Won't Fix
Status in linux-raspi2 source package in Eoan:
Won't Fix
Status in linux-raspi source package in Focal:
Fix Released
Status in linux-raspi source package in Groovy:
Fix Released
Bug description:
[Impact]
A mix of incoming TCP traffic, forwarding packets and saturating the
link results in lan78xx TX queue timeouts which brings the network
interface down.
[Test Case]
Se comment #99 below.
[Where Problems Could Occur]
Probably lost or corrupted TCP packets. Most likely not worse than
what we're currently seeing.
[Original Description]
Desciption changed:
Raspberry Pi 3 network partially dies (transmission doesn't work, reception
still does) shortly after a burst of network load over IPv6, when IPv6
connectivity is provided by a tunnel from tunnelbroker.net. The triggering load
is typically an HTTP(S) download, and replication can be done without actually
saving the file (wget -O /dev/null ...). Problem happens within downloading ~10
GB, usually withinthe first 1 GB of traffic)
Replication is 100% as long as _all_ of the following conditions are met
- 6in4 tunnel to HE.net set up with netplan
- ipv6 rules applied (netfilter-persistent)
- ipv6 forwarding enabled (edit /etc/sysctl.conf)
kern.log message that appears after a while:
Feb 4 23:42:59 rpi3 kernel: [ 571.878359] ------------[ cut here
]------------
Feb 4 23:42:59 rpi3 kernel: [ 571.878420] NETDEV WATCHDOG: eth0 (lan78xx):
transmit queue 0 timed out
Feb 4 23:42:59 rpi3 kernel: [ 571.878550] WARNING: CPU: 3 PID: 0 at
net/sched/sch_generic.c:447 dev_watchdog+0x324/0x330
Feb 4 23:42:59 rpi3 kernel: [ 571.878557] Modules linked in: sit tunnel4
ip_tunnel bridge stp llc ip6table_filter ip6_tables xt_tcpudp xt_conntrack
nf_conntrack iptable_filter bpfilter nls_ascii dm_multipath scsi_dh_rdac
scsi_dh_emc scsi_dh_alua btsdio bluetooth ecdh_generic ecc brcmfmac brcmutil
cfg80211 bcm2835_v4l2(CE) bcm2835_mmal_vchiq(CE) input_leds vc_sm_cma(CE)
v4l2_common videobuf2_vmalloc spidev videobuf2_memops videobuf2_v4l2
raspberrypi_hwmon videobuf2_common videodev mc uio_pdrv_genirq uio sch_fq_codel
jool(OE) jool_common(OE) nf_defrag_ipv6 nf_defrag_ipv4 ip_tables x_tables
autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy
async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c raid1 raid0
multipath linear hid_generic usbhid crct10dif_ce sdhci_iproc phy_generic fixed
aes_neon_bs aes_neon_blk crypto_simd cryptd aes_arm64
Feb 4 23:42:59 rpi3 kernel: [ 571.878774] CPU: 3 PID: 0 Comm: swapper/3
Tainted: G C OE 5.3.0-1017-raspi2 #19-Ubuntu
Feb 4 23:42:59 rpi3 kernel: [ 571.878781] Hardware name: Raspberry Pi 3
Model B Plus Rev 1.3 (DT)
Feb 4 23:42:59 rpi3 kernel: [ 571.878789] pstate: 60400005 (nZCv daif +PAN
-UAO)
Feb 4 23:42:59 rpi3 kernel: [ 571.878800] pc : dev_watchdog+0x324/0x330
Feb 4 23:42:59 rpi3 kernel: [ 571.878807] lr : dev_watchdog+0x324/0x330
Feb 4 23:42:59 rpi3 kernel: [ 571.878812] sp : ffff00001001bd60
Feb 4 23:42:59 rpi3 kernel: [ 571.878817] x29: ffff00001001bd60 x28:
0000000000000140
Feb 4 23:42:59 rpi3 kernel: [ 571.878827] x27: 00000000ffffffff x26:
0000000000000000
Feb 4 23:42:59 rpi3 kernel: [ 571.878836] x25: ffff8ecbefa4e000 x24:
ffff305e0f529018
Feb 4 23:42:59 rpi3 kernel: [ 571.878845] x23: 0000000000000000 x22:
0000000000000001
Feb 4 23:42:59 rpi3 kernel: [ 571.878853] x21: ffff8ecbefa4e480 x20:
ffff305e0f807000
Feb 4 23:42:59 rpi3 kernel: [ 571.878862] x19: 0000000000000000 x18:
0000000000000000
Feb 4 23:42:59 rpi3 kernel: [ 571.878871] x17: ffff000010fd8218 x16:
ffff305e0e30efb8
Feb 4 23:42:59 rpi3 kernel: [ 571.878879] x15: ffff8ecbf922a290 x14:
ffffffffffffffff
Feb 4 23:42:59 rpi3 kernel: [ 571.878888] x13: 0000000000000000 x12:
ffff305e0f944000
Feb 4 23:42:59 rpi3 kernel: [ 571.878897] x11: ffff305e0f82d000 x10:
0000000000000000
Feb 4 23:42:59 rpi3 kernel: [ 571.878905] x9 : 0000000000000004 x8 :
000000000000017f
Feb 4 23:42:59 rpi3 kernel: [ 571.878913] x7 : 0000000000000000 x6 :
0000000000000001
Feb 4 23:42:59 rpi3 kernel: [ 571.878921] x5 : 0000000000000000 x4 :
0000000000000008
Feb 4 23:42:59 rpi3 kernel: [ 571.878929] x3 : ffff305e0ee15750 x2 :
0000000000000004
Feb 4 23:42:59 rpi3 kernel: [ 571.878937] x1 : 6abb42c67c954600 x0 :
0000000000000000
Feb 4 23:42:59 rpi3 kernel: [ 571.878946] Call trace:
Feb 4 23:42:59 rpi3 kernel: [ 571.878955] dev_watchdog+0x324/0x330
Feb 4 23:42:59 rpi3 kernel: [ 571.878967] call_timer_fn+0x3c/0x178
Feb 4 23:42:59 rpi3 kernel: [ 571.878977] __run_timers.part.0+0x200/0x330
Feb 4 23:42:59 rpi3 kernel: [ 571.878985] run_timer_softirq+0x40/0x78
Feb 4 23:42:59 rpi3 kernel: [ 571.878995] __do_softirq+0x168/0x384
Feb 4 23:42:59 rpi3 kernel: [ 571.879007] irq_exit+0xb0/0xe8
Feb 4 23:42:59 rpi3 kernel: [ 571.879020] __handle_domain_irq+0x70/0xc0
Feb 4 23:42:59 rpi3 kernel: [ 571.879028]
bcm2836_arm_irqchip_handle_irq+0x74/0xe0
Feb 4 23:42:59 rpi3 kernel: [ 571.879037] el1_irq+0x108/0x200
Feb 4 23:42:59 rpi3 kernel: [ 571.879050] arch_cpu_idle+0x3c/0x1c8
Feb 4 23:42:59 rpi3 kernel: [ 571.879069] default_idle_call+0x24/0x48
Feb 4 23:42:59 rpi3 kernel: [ 571.879081] do_idle+0x210/0x2a0
Feb 4 23:42:59 rpi3 kernel: [ 571.879091] cpu_startup_entry+0x28/0x30
Feb 4 23:42:59 rpi3 kernel: [ 571.879102]
secondary_start_kernel+0x154/0x1c8
Feb 4 23:42:59 rpi3 kernel: [ 571.879108] ---[ end trace 349744d60a20e77a
]---
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-1017-raspi2 5.3.0-1017.19
ProcVersionSignature: Ubuntu 5.3.0-1017.19-raspi2 5.3.13
Uname: Linux 5.3.0-1017-raspi2 aarch64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: arm64
Date: Tue Feb 4 23:49:19 2020
ProcEnviron:
TERM=linux
PATH=(custom, no user)
LANG=C.UTF-8
SHELL=/bin/bash
SourcePackage: linux-raspi2
UpgradeStatus: No upgrade log present (probably fresh install)
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