On Fri, 2010-09-10 at 23:06 +0200, Christoph Pleger wrote:
> Hello,
>
> I am running a Debian 2.6.32-Kernel (which by the way contains a lot of
> unresolved symbols in many dvb modules). As this kernel does not support my
> WinTV Nova-T USB-Stick, I downloaded the latest sources via the web interface
> from linuxtv.org, compiled the sources and installed the resulting modules.
>
> When I now connect the USB stick, the DVB modules are loaded correctly, but
> when I start an application to watch TV, I get a Kernel Oops.
> These lines from my kern.log show the Oops event:
> Sep 8 19:51:28 superstar kernel: [ 3492.321914] BUG: unable to handle kernel
> NULL pointer dereference at 0000000000000012
> Sep 8 19:51:28 superstar kernel: [ 3492.321920] IP: [<ffffffffa015e3db>]
> i2c_transfer+0x1c/0xc0 [i2c_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.321928] PGD 1b8e69067 PUD 1b8e6a067
> PMD 0
> Sep 8 19:51:28 superstar kernel: [ 3492.321932] Oops: 0000 [#1] SMP
> Sep 8 19:51:28 superstar kernel: [ 3492.321934] last sysfs
> file: /sys/devices/pci0000:00/0000:00:02.1/usb2/2-5/input/input6/capabilities/sw
> Sep 8 19:51:28 superstar kernel: [ 3492.321936] CPU 0
> Sep 8 19:51:28 superstar kernel: [ 3492.321938] Modules linked in: mt2060
> dvb_usb_dib0700 dib7000p dib0090 dib7000m dib0070 dvb_usb dib8000 dvb_core
> dib30
> 00mc dibx000_common fglrx(P) binfmt_misc rfcomm l2cap crc16 bluetooth rfkill
> vboxnetadp vboxnetflt vboxdrv battery ppdev lp ext3 jbd mbcache xfs exportfs
> r
> eiserfs hwmon_vid eeprom firewire_sbp2 firewire_core crc_itu_t loop
> snd_hda_codec_atihdmi parport_pc parport psmouse evdev serio_raw
> snd_emu10k1_synth snd_
> emux_synth snd_seq_virmidi snd_seq_midi_emul snd_hda_intel snd_hda_codec
> snd_emu10k1 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_seq_midi
> snd_pcm
> snd_rawmidi snd_util_mem asus_atk0110 snd_seq_midi_event snd_hwdep snd_seq
> snd_timer snd_seq_device emu10k1_gp pcspkr gameport snd snd_page_alloc
> soundcor
> e k8temp edac_core edac_mce_amd button processor i2c_nforce2 i2c_core jfs
> dm_mirror dm_region_hash dm_log dm_snapshot dm_mod sg sr_mod cdrom sd_mod
> crc_t10
> dif ata_generic floppy fan pata_amd sata_nv ehci_hcd ohci_hcd libata thermal
> forcedeth thermal_sys scsi_mod usbcore nls_base [last unloaded:
> scsi_wait_scan
> ]
> Sep 8 19:51:28 superstar kernel: [ 3492.321984] Pid: 26841, comm: kaffeine
> Tainted: P 2.6.32-bpo.5-amd64 #1 System Product Name
> Sep 8 19:51:28 superstar kernel: [ 3492.321986] RIP: 0010:
> [<ffffffffa015e3db>] [<ffffffffa015e3db>] i2c_transfer+0x1c/0xc0 [i2c_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.321990] RSP: 0018:ffff8801b95d9ba8
> EFLAGS: 00010292
> Sep 8 19:51:28 superstar kernel: [ 3492.321992] RAX: ffff8801b95d9c08 RBX:
> 0000000000000002 RCX: 0000000000000000
> Sep 8 19:51:28 superstar kernel: [ 3492.321994] RDX: 0000000000000002 RSI:
> ffff8801b95d9be8 RDI: 0000000000000002
> Sep 8 19:51:28 superstar kernel: [ 3492.321995] RBP: 00000000ffffffa1 R08:
> 000000000e008d80 R09: ffff880037803300
> Sep 8 19:51:28 superstar kernel: [ 3492.321997] R10: ffff880037803360 R11:
> 0000000000000002 R12: ffff8802115a6800
> Sep 8 19:51:28 superstar kernel: [ 3492.321999] R13: 0000000000000001 R14:
> 0000000000000002 R15: ffff8801b95d9be8
> Sep 8 19:51:28 superstar kernel: [ 3492.322001] FS: 00007f2765d656f0(0000)
> GS:ffff880008c00000(0000) knlGS:0000000000000000
> Sep 8 19:51:28 superstar kernel: [ 3492.322003] CS: 0010 DS: 0000 ES: 0000
> CR0: 000000008005003b
> Sep 8 19:51:28 superstar kernel: [ 3492.322004] CR2: 0000000000000012 CR3:
> 00000001b8e68000 CR4: 00000000000006f0
> Sep 8 19:51:28 superstar kernel: [ 3492.322006] DR0: 0000000000000000 DR1:
> 0000000000000000 DR2: 0000000000000000
> Sep 8 19:51:28 superstar kernel: [ 3492.322008] DR3: 0000000000000000 DR6:
> 00000000ffff0ff0 DR7: 0000000000000400
> Sep 8 19:51:28 superstar kernel: [ 3492.322010] Process kaffeine (pid: 26841,
> threadinfo ffff8801b95d8000, task ffff88022305b170)
> Sep 8 19:51:28 superstar kernel: [ 3492.322011] Stack:
> Sep 8 19:51:28 superstar kernel: [ 3492.322012] ffff8801b8c09e18
> 00000000000000eb ffffc90013b0c000 ffff8802115a6800
> Sep 8 19:51:28 superstar kernel: [ 3492.322015] <0> 0000000000000001
> ffffc90012e51000 ffff8802115650c8 ffffffffa0271109
> Sep 8 19:51:28 superstar kernel: [ 3492.322017] <0> 0000000200000010
> ffff8801b95d9c18 0000000200010010 ffff8801b95d9c08
> Sep 8 19:51:28 superstar kernel: [ 3492.322020] Call Trace:
> Sep 8 19:51:28 superstar kernel: [ 3492.322024] [<ffffffffa0271109>] ?
> dib7000p_read_word+0x6e/0xbe [dib7000p]
> Sep 8 19:51:28 superstar kernel: [ 3492.322027] [<ffffffffa01fd05e>] ?
> usb_urb_submit+0x3f/0x81 [dvb_usb]
> Sep 8 19:51:28 superstar kernel: [ 3492.322030] [<ffffffffa0271cdb>] ?
> dib7000p_pid_filter_ctrl+0x1e/0x74 [dib7000p]
> Sep 8 19:51:28 superstar kernel: [ 3492.322033] [<ffffffffa01fc354>] ?
> dvb_usb_ctrl_feed+0x16b/0x1ca [dvb_usb]
> Sep 8 19:51:28 superstar kernel: [ 3492.322038] [<ffffffffa0393610>] ?
> dmx_ts_feed_start_filtering+0x72/0xc6 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322041] [<ffffffffa039099e>] ?
> dvb_dmxdev_start_feed+0xbe/0xe6 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322045] [<ffffffffa0391ae1>] ?
> dvb_dmxdev_filter_start+0x2a9/0x315 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322049] [<ffffffffa0391dcf>] ?
> dvb_dmxdev_add_pid+0x50/0xf6 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322052] [<ffffffffa03920e6>] ?
> dvb_demux_do_ioctl+0x271/0x4b7 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322055] [<ffffffffa0390332>] ?
> dvb_usercopy+0xb4/0x128 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322059] [<ffffffffa0391e75>] ?
> dvb_demux_do_ioctl+0x0/0x4b7 [dvb_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322063] [<ffffffff810f6e63>] ?
> do_filp_open+0x4e4/0x94b
> Sep 8 19:51:28 superstar kernel: [ 3492.322066] [<ffffffff810f8b83>] ?
> vfs_ioctl+0x56/0x6c
> Sep 8 19:51:28 superstar kernel: [ 3492.322068] [<ffffffff810f909c>] ?
> do_vfs_ioctl+0x48d/0x4cb
> Sep 8 19:51:28 superstar kernel: [ 3492.322072] [<ffffffff810e3e9d>] ?
> virt_to_head_page+0x9/0x2a
> Sep 8 19:51:28 superstar kernel: [ 3492.322074] [<ffffffff810f912b>] ?
> sys_ioctl+0x51/0x70
> Sep 8 19:51:28 superstar kernel: [ 3492.322078] [<ffffffff81010b42>] ?
> system_call_fastpath+0x16/0x1b
> Sep 8 19:51:28 superstar kernel: [ 3492.322079] Code: c2 22 e1 15 a0 e8 0b d5
> 0b e1 48 83 c4 18 c3 41 57 49 89 f7 41 56 41 89 d6 41 55 41 54 55 bd a1 ff ff
> ff 53 48 89 fb 48 83 ec 08 <48> 8b 47 10 48 83 38 00 0f 84 87 00 00 00 65 48
> 8b 04 25 c8 cb
> Sep 8 19:51:28 superstar kernel: [ 3492.322098] RIP [<ffffffffa015e3db>]
> i2c_transfer+0x1c/0xc0 [i2c_core]
> Sep 8 19:51:28 superstar kernel: [ 3492.322102] RSP <ffff8801b95d9ba8>
> Sep 8 19:51:28 superstar kernel: [ 3492.322103] CR2: 0000000000000012
> Sep 8 19:51:28 superstar kernel: [ 3492.322105] ---[ end trace
> 106578cacf144da6 ]---
This Ooops is happening in i2c-core.c:i2c_transfer():
int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
{
unsigned long orig_jiffies;
int ret, try;
[...]
if (adap->algo->master_xfer) { <---- Ooops is here. "adap" is bad
The value for "adap" is in register RDI: 0000000000000002, and that is
not a valid pointer. There is a bug in dib7000p.c somewhere.
Do a 'hg log -v -p linux/drivers/media/dvb/frontends/dib7000p.c | less'
to see what might have changed.
That's about all I can do to help with this particular hardware.
Regards,
Andy
> What can I do to solve the problem?
>
> Regards
> Christoph
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