BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
00000000
*pde = 00000000
Oops: 0000 [#1]
SMP 
Modules linked in: mt2060 dvb_usb_dib0700 dib7000m dib7000p dvb_usb dvb_core dvb_pll dib3000mc dibx000_common sit tunnel4 xt_tcpudp iptable_filter ip_tables x_tables binfmt_misc nfs tcp_diag inet_diag nfsd exportfs lockd nfs_acl sunrpc ppdev lp button ac battery ipv6 dm_snapshot tun eeprom i2c_i801 via686a w83781d hwmon_vid i2c_isa 8021q aes loop sd_mod tsdev snd_via82xx gameport snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_mpu401_uart firmware_class snd_seq_dummy snd_seq_oss snd_seq_midi snd_seq_midi_event psmouse serio_raw snd_seq snd_timer rtc parport_pc parport snd_rawmidi snd_seq_device floppy snd soundcore pcspkr i2c_viapro i2c_core shpchp pci_hotplug evdev via_agp agpgart reiserfs dm_mirror dm_mod usb_storage ide_disk generic via82cxxx ide_core via_rhine mii ehci_hcd uhci_hcd usbcore ata_generic sata_via libata scsi_mod r8169 thermal processor fan
CPU:    0
EIP:    0060:[<00000000>]    Not tainted VLI
EFLAGS: 00210286   (2.6.21-1-686 #1)
EIP is at _stext+0x3fefecdc/0x14
eax: f7ea7800   ebx: 40246f4c   ecx: 00000000   edx: f1f5c0d4
esi: e6bb7e00   edi: f1f5c278   ebp: 00000000   esp: e345fc3c
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process vdr (pid: 10062, ti=e345e000 task=e3443a90 task.ti=e345e000)
Stack: f8afba87 e345fe94 e345fe94 e345fe94 e345fea4 00000000 c017225a 00000000 
       00000000 f7ea7800 f1f5c000 fffffe00 e3443a90 c011d236 00100100 00200200 
       f1f5ca44 00000000 00000000 00000000 00000000 00000000 00000000 00000000 
Call Trace:
 [<f8afba87>] dvb_frontend_ioctl+0x5f0/0xd5a [dvb_core]
 [<c017225a>] __pollwait+0x0/0xac
 [<c011d236>] default_wake_function+0x0/0xc
 [<c011b0fe>] __activate_task+0x1c/0x29
 [<c011d22c>] try_to_wake_up+0x39b/0x3a5
 [<c011af06>] __wake_up_common+0x32/0x55
 [<c011b428>] __wake_up+0x32/0x43
 [<c023c69c>] sock_def_readable+0x39/0x63
 [<c01c80ec>] __next_cpu+0x12/0x21
 [<c011bad8>] find_busiest_group+0x1b4/0x4c5
 [<c0102ff1>] __switch_to+0xfe/0x131
 [<c029cebd>] __sched_text_start+0x675/0x73b
 [<c015a050>] find_extend_vma+0x12/0x49
 [<c01397dc>] get_futex_key+0x3a/0xe3
 [<c029d611>] schedule_timeout+0x13/0x8d
 [<c015a050>] find_extend_vma+0x12/0x49
 [<f8af5105>] dvb_usercopy+0xa9/0x100 [dvb_core]
 [<f8af518e>] dvb_generic_ioctl+0x32/0x3b [dvb_core]
 [<f8afb497>] dvb_frontend_ioctl+0x0/0xd5a [dvb_core]
 [<c0170e6c>] do_ioctl+0x4c/0x62
 [<c01710c6>] vfs_ioctl+0x244/0x256
 [<c013b258>] sys_futex+0x98/0xab
 [<c0171124>] sys_ioctl+0x4c/0x64
 [<c0103d8c>] syscall_call+0x7/0xb
 =======================
Code:  Bad EIP value.
EIP: [<00000000>] _stext+0x3fefecdc/0x14 SS:ESP 0068:e345fc3c