I can confirm for 2.6.31-5 (kubuntu karmic alpha 4)
[ 3530.212193] usb 2-1: new high speed USB device using ehci_hcd and address 4
[ 3530.348913] usb 2-1: configuration #1 chosen from 1 choice
[ 3530.368736] dvb-usb: found a 'Afatech AF9015 DVB-T USB2.0 stick' in cold
state, will try to load a firmware
[ 3530.368749] usb 2-1: firmware: requesting dvb-usb-af9015.fw
[ 3530.437640] dvb-usb: downloading firmware from file 'dvb-usb-af9015.fw'
[ 3530.495125] BUG: unable to handle kernel paging request at ffffc900050db16a
[ 3530.495141] IP: [<ffffffff8127434b>] memcpy_c+0xb/0x20
[ 3530.495159] PGD 11fc06067 PUD 11fc07067 PMD 11a421067 PTE 80000000ac47c161
[ 3530.495172] Oops: 0003 [#1] SMP
[ 3530.495180] last sysfs file:
/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-1/firmware/2-1/loading
[ 3530.495188] CPU 1
[ 3530.495192] Modules linked in: tun binfmt_misc ppdev bridge stp bnep nfsd
exportfs nfs lockd nfs_acl auth_rpcgss sunrpc dm_crypt dvb_usb_af9015 dvb_usb
dvb_core coretemp uinpu t sbp2 lp parport joydev arc4 ecb snd_hda_codec_idt
iwlagn iwlcore snd_hda_intel snd_hda_codec mac80211 snd_pcm_oss snd_mixer_oss
snd_pcm dell_wmi sdhci_pci sdhci snd_seq_dummy p smouse snd_seq_oss
dell_laptop snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq ricoh_mmc
uvcvideo snd_timer dcdbas serio_raw cfg80211 usbhid led_class snd_seq_device
nvidia(P ) videodev v4l1_compat v4l2_compat_ioctl32 btusb snd soundcore
snd_page_alloc tg3 ohci1394 ieee1394 fbcon tileblit font bitblit softcursor
i915 drm i2c_algo_bit video output inte l_agp
[ 3530.495328] Pid: 259, comm: khubd Tainted: P 2.6.31-5-generic
#24-Ubuntu XPS M1330
[ 3530.495335] RIP: 0010:[<ffffffff8127434b>] [<ffffffff8127434b>]
memcpy_c+0xb/0x20
[ 3530.495346] RSP: 0018:ffff88011b1d16c8 EFLAGS: 00010202
[ 3530.495352] RAX: ffffc900050db16a RBX: ffff88011b1d17a0 RCX:
0000000000000006
[ 3530.495357] RDX: 0000000000000002 RSI: ffff88011b1d16f2 RDI:
ffffc900050db16a
[ 3530.495363] RBP: ffff88011b1d1770 R08: 0000000000000000 R09:
0000000000000000
[ 3530.495369] R10: 0000000000000000 R11: 00000000ffffffff R12:
ffff880104204000
[ 3530.495375] R13: 0000000000000008 R14: 0000000000000000 R15:
ffff88011b1d16f0
[ 3530.495382] FS: 0000000000000000(0000) GS:ffff88002803c000(0000)
knlGS:0000000000000000
[ 3530.495389] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[ 3530.495394] CR2: ffffc900050db16a CR3: 0000000001001000 CR4:
00000000000006a0
[ 3530.495401] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 3530.495407] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 3530.495413] Process khubd (pid: 259, threadinfo ffff88011b1d0000, task
ffff88011b1c16b0)
[ 3530.495418] Stack:
[ 3530.495422] ffffffffa0d662b0 0000000000000036 00000000ffffffff
ffff88011b1d1780
[ 3530.495432] <0> 0000000200000246 00000000000000f0 0000000000000000
0000000000000000
[ 3530.495442] <0> 0000000000000000 0000000000000000 0000000000000000
0d13c91400000000
[ 3530.495454] Call Trace:
[ 3530.495469] [<ffffffffa0d662b0>] ? af9015_rw_udev+0x240/0x2c0
[dvb_usb_af9015]
[ 3530.495481] [<ffffffffa0d66b56>] af9015_download_firmware+0x126/0x190
[dvb_usb_af9015]
[ 3530.495497] [<ffffffffa0d5f38b>] dvb_usb_download_firmware+0x9b/0xe0
[dvb_usb]
[ 3530.495509] [<ffffffffa0d5fbf8>] dvb_usb_device_init+0x2a8/0x380 [dvb_usb]
[ 3530.495523] [<ffffffffa0d67f0f>] af9015_usb_probe+0xaf/0x15c
[dvb_usb_af9015]
[ 3530.495534] [<ffffffff813996a1>] usb_probe_interface+0xb1/0x190
[ 3530.495545] [<ffffffff81318d40>] ? __device_attach+0x0/0x50
[ 3530.495553] [<ffffffff81318b74>] really_probe+0x64/0x160
[ 3530.495560] [<ffffffff81318d40>] ? __device_attach+0x0/0x50
[ 3530.495568] [<ffffffff81318d40>] ? __device_attach+0x0/0x50
[ 3530.495576] [<ffffffff81318c93>] driver_probe_device+0x23/0x30
[ 3530.495584] [<ffffffff81318d8b>] __device_attach+0x4b/0x50
[ 3530.495592] [<ffffffff81317cf8>] bus_for_each_drv+0x68/0x90
[ 3530.495600] [<ffffffff81318e46>] device_attach+0x86/0x90
[ 3530.495608] [<ffffffff81317af5>] bus_attach_device+0x55/0x80
[ 3530.495616] [<ffffffff81316479>] device_add+0x2e9/0x3d0
[ 3530.495624] [<ffffffff81397b48>] usb_set_configuration+0x478/0x780
[ 3530.495633] [<ffffffff81318d40>] ? __device_attach+0x0/0x50
[ 3530.495642] [<ffffffff813a13b2>] generic_probe+0x32/0xb0
[ 3530.495650] [<ffffffff81318a5a>] ? driver_sysfs_add+0x5a/0x90
[ 3530.495657] [<ffffffff81397f25>] usb_probe_device+0x25/0x30
[ 3530.495664] [<ffffffff81318b74>] really_probe+0x64/0x160
[ 3530.495672] [<ffffffff81318d40>] ? __device_attach+0x0/0x50
[ 3530.495680] [<ffffffff81318c93>] driver_probe_device+0x23/0x30
[ 3530.495688] [<ffffffff81318d8b>] __device_attach+0x4b/0x50
[ 3530.495696] [<ffffffff81317cf8>] bus_for_each_drv+0x68/0x90
[ 3530.495703] [<ffffffff81318e46>] device_attach+0x86/0x90
[ 3530.495712] [<ffffffff81317af5>] bus_attach_device+0x55/0x80
[ 3530.495719] [<ffffffff81316479>] device_add+0x2e9/0x3d0
[ 3530.495729] [<ffffffff8138f9dd>] usb_new_device+0x6d/0xe0
[ 3530.495737] [<ffffffff81390368>] hub_port_connect_change+0x4a8/0x960
[ 3530.495747] [<ffffffff81391cb2>] hub_events+0x3a2/0x590
[ 3530.495758] [<ffffffff8151b5f9>] ? thread_return+0x48/0x37f
[ 3530.495766] [<ffffffff81391ea0>] ? hub_thread+0x0/0x190
[ 3530.495774] [<ffffffff81391eda>] hub_thread+0x3a/0x190
[ 3530.495783] [<ffffffff81072da0>] ? autoremove_wake_function+0x0/0x40
[ 3530.495791] [<ffffffff81391ea0>] ? hub_thread+0x0/0x190
[ 3530.495798] [<ffffffff810729b6>] kthread+0x96/0xa0
[ 3530.495806] [<ffffffff8101308a>] child_rip+0xa/0x20
[ 3530.495814] [<ffffffff81072920>] ? kthread+0x0/0xa0
[ 3530.495821] [<ffffffff81013080>] ? child_rip+0x0/0x20
[ 3530.495825] Code: 81 ea d8 1f 00 00 48 3b 42 20 73 07 48 8b 50 f9 31 c0 c3
31 d2 48 c7 c0 f2 ff ff ff c3 90 90 90 48 89 f8 89 d1 c1 e9 03 83 e2 07 <f3> 48
a5 89 d1 f3 a4 c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
[ 3530.495909] RIP [<ffffffff8127434b>] memcpy_c+0xb/0x20
[ 3530.495919] RSP <ffff88011b1d16c8>
[ 3530.495923] CR2: ffffc900050db16a
[ 3530.495930] ---[ end trace 81316e448df2eeaf ]---
--
BUG in dvb-usb
https://bugs.launchpad.net/bugs/403156
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