Public bug reported:
The following appears in the dmesg.
[30069.000142] ------------[ cut here ]------------
[30069.000163] WARNING: at /build/buildd/linux-2.6.27/net/sched/sch_generic.c:21
9 dev_watchdog+0x21a/0x230()
[30069.000172] NETDEV WATCHDOG: hso0 (hso): transmit timed out
[30069.000177] Modules linked in: ipt_REJECT ipt_LOG xt_limit xt_state ipt_REDIR
ECT xt_tcpudp ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack i
ptable_mangle binfmt_misc af_packet radeon drm thinkpad_acpi led_class nvram ppd
ev sbs container pci_slot wmi sbshc ipv6 iptable_filter ip_tables x_tables lp hs
o rfkill ohci_hcd pcmcia hostap_pci hostap ieee80211_crypt snd_intel8x0 snd_ac97
_codec ac97_bus snd_pcm_oss snd_mixer_oss evdev snd_pcm psmouse battery yenta_so
cket serio_raw rsrc_nonstatic ac pcmcia_core orinoco_pci orinoco hermes snd_seq_
dummy video output parport_pc parport irda crc_ccitt snd_seq_oss snd_seq_midi sn
d_rawmidi snd_seq_midi_event button snd_seq pcspkr snd_timer snd_seq_device snd
soundcore intel_agp snd_page_alloc iTCO_wdt iTCO_vendor_support shpchp agpgart p
ci_hotplug ext3 jbd mbcache sr_mod cdrom sd_mod crc_t10dif sg ata_piix pata_acpi
ata_generic libata e100 mii scsi_mod dock uhci_hcd usbcore thermal processor fa
n fbcon tileblit font bitblit softcursor fuse
[30069.000389] Pid: 0, comm: swapper Not tainted 2.6.27-7-generic #1
[30069.000397] [<c0131d65>] warn_slowpath+0x65/0x90
[30069.000413] [<c0124aba>] ? enqueue_entity+0xda/0x2f0
[30069.000425] [<c012a708>] ? enqueue_task_fair+0x48/0x50
[30069.000437] [<c0120f97>] ? enqueue_task+0x57/0x70
[30069.000452] [<c012b4ee>] ? try_to_wake_up+0xde/0x290
[30069.000464] [<c037e511>] ? _spin_lock_irqsave+0x31/0x40
[30069.000477] [<c0154387>] ? timer_stats_update_stats+0x17/0x250
[30069.000491] [<c0254299>] ? strlen+0x9/0x20
[30069.000504] [<c025231d>] ? strlcpy+0x1d/0x60
[30069.000515] [<c02f0967>] ? netdev_drivername+0x37/0x40
[30069.000527] [<c0305b6a>] dev_watchdog+0x21a/0x230
[30069.000539] [<c0143e96>] ? __queue_work+0x36/0x50
[30069.000552] [<c013bf88>] run_timer_softirq+0x138/0x210
[30069.000565] [<c0305950>] ? dev_watchdog+0x0/0x230
[30069.000577] [<c0305950>] ? dev_watchdog+0x0/0x230
[30069.000589] [<c0137682>] __do_softirq+0x92/0x120
[30069.000599] [<c013776d>] do_softirq+0x5d/0x60
[30069.000609] [<c01378e5>] irq_exit+0x55/0x90
[30069.000618] [<c0106c1a>] do_IRQ+0x4a/0x80
[30069.000630] [<c0105003>] common_interrupt+0x23/0x30
[30069.000641] [<c01700d8>] ? __audit_mq_getsetattr+0x68/0xb0
[30069.000669] [<d88589a7>] ? acpi_idle_enter_simple+0x158/0x193 [processor]
[30069.000699] [<d885865f>] acpi_idle_enter_bm+0xc7/0x2b7 [processor]
[30069.000719] [<c02dbf7b>] cpuidle_idle_call+0x7b/0xd0
[30069.000729] [<c010288d>] cpu_idle+0x7d/0x140
[30069.000739] [<c036edd3>] rest_init+0x53/0x60
[30069.000753] =======================
[30069.000759] ---[ end trace e83961f5d0f7b8eb ]---
[30069.000766] net hso0: Tx timed out.
also, it appears that it is possible to receive data:
[30144.241455] Rejectwall: IN=hso0 OUT= MAC= SRC=193.212.1.10 DST=77.qq.yy.nn
LEN=152 TOS=0x00 PREC=0x00 TTL=24
6 ID=45340 DF PROTO=UDP SPT=53 DPT=62478 LEN=132
[30149.000119] net hso0: Tx timed out.
/tb
** Affects: ubuntu
Importance: Undecided
Status: New
--
hso causes watchdog timeout
https://bugs.launchpad.net/bugs/309820
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