[linux-dvb] crash with terratec cinergy hybrid XS [0ccd:0042]

Markus Rechberger mrechberger at gmail.com
Sun Apr 27 00:17:57 CEST 2008


On 4/26/08, Steffen Schulz <pepe_ml at gmx.net> wrote:
> On 080426 at 23:00, Markus Rechberger wrote:
> > cd xc3028
> > make
> > insmod xc3028-tuner.ko
> >
> > and replug your device.
>
> Cool, this actually works. The driver seems very unstable though.
> Somewhere between replugging and rmmod, in case it helps:
>
> xc3028 I2C read failed
> zl10353: write to reg 62 failed (err = -71)!
> zl10353: write to reg 5f failed (err = -71)!
> zl10353: write to reg 71 failed (err = -71)!
> zl10353_read_register: readreg error (reg=6, ret==-71)
> zl10353_read_register: readreg error (reg=10, ret==-71)
> zl10353_read_register: readreg error (reg=11, ret==-71)
> zl10353_read_register: readreg error (reg=16, ret==-71)
> zl10353_read_register: readreg error (reg=17, ret==-71)
> zl10353_read_register: readreg error (reg=18, ret==-71)
> zl10353_read_register: readreg error (reg=19, ret==-71)
> zl10353_read_register: readreg error (reg=20, ret==-71)
> zl10353_read_register: readreg error (reg=21, ret==-71)
> zl10353: write to reg 62 failed (err = -71)!

device node locking is uncommented in the driver, this can cause some
troubles with newer kernels... I'll put it in within the next hour
including powermanagement.for that device.

> usb 7-1.1.4: USB disconnect, address 18

ok here we have a disconnect

> BUG: unable to handle kernel NULL pointer dereference at virtual address
> 00000000
> printing eip: f8b86369 *pde = 00000000
> Oops: 0000 [#1] SMP
> Modules linked in: twofish twofish_common serpent blowfish des_generic
> ecb xcbc md5 hmac em28xx_dvb em28xx xc3028_tuner dvb_core drx3973d
> lgdt3304_demod(P) zl10353_demod videodev bridge llc nvidia(P) i2c_core
> deflate zlib_deflate zlib_inflate crypto_hash af_key dm_snapshot
> applesmc led_class appletouch input_polldev fuse aes_generic coretemp
> hwmon compat_ioctl32 v4l1_compat v4l2_common usbhid snd_hda_intel
> wlan_scan_sta ath_rate_sample snd_pcm_oss snd_mixer_oss snd_pcm
> snd_timer snd soundcore snd_page_alloc ehci_hcd sky2 ath_pci wlan
> ath_hal(P) uhci_hcd usbcore backlight intel_agp agpgart
>
> Pid: 8486, comm: rmmod Tainted: P        (2.6.24.4-mactel #3)
> EIP: 0060:[<f8b86369>] EFLAGS: 00210206 CPU: 1
> EIP is at dvb_unregister_device+0x19/0x60 [dvb_core]
> EAX: 00000000 EBX: f5c6de80 ECX: f8bf7e20 EDX: 0d400000
> ESI: f6f9ea98 EDI: f59bb000 EBP: e0c14000 ESP: e0c15f14
>  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
>  Process rmmod (pid: 8486, ti=e0c14000 task=f7d38570 task.ti=e0c14000)
>  Stack: 00000000 f8b8f8dd c035b32c 00000001 c03ade57 c0154e30 e0c15f9c
> 00000000
>         f6f9e800 f89e824f c0154e30 f89eb2e0 00000000 00000000 f8bdf12c
> f89eb340
>         f8830000 f89eb340 c0154932 38326d65 645f7878 00006276 c016bfe1
> b7f32000
> Call Trace:
> [<f8b8f8dd>] dvb_net_release+0x1d/0xa0 [dvb_core]

this bug moreover seems to be dvb_core related... the deregistration
of dvbnet happens before anything else gets freed in the em2880-dvb
driver.

> [<c035b32c>] wait_for_common+0x1c/0x120
> [<c0154e30>] __try_stop_module+0x0/0x80
> [<f89e824f>] em2880_dvb_fini+0x2f/0x100 [em28xx_dvb]
> [<c0154e30>] __try_stop_module+0x0/0x80
> [<f8bdf12c>] em28xx_unregister_extension+0x3c/0x80 [em28xx]
> [<c0154932>] sys_delete_module+0x112/0x1c0
> [<c016bfe1>] remove_vma+0x41/0x50
> [<c016caf0>] do_munmap+0x180/0x1f0
> [<c01053a6>] sysenter_past_esp+0x6b/0xa1
>  =======================
>  Code: e8 9d 54 7d c7 89 d8 83 c4 14 5b 5e 5f 5d c3 8d 76 00 85 c0 53 89 c3
>        74 4a 8b 50 14 c1 e2 04 0b 50 10 8b 40 0c 81 ca 00 00 40 0d <8b> 00
>        c1 e0 06 09 c2 a1 c4 99 b9 f8 e8 36 ae 71 c7 8b 43 04 8b
> EIP: [<f8b86369>] dvb_unregister_device+0x19/0x60 [dvb_core]  SS:ESP
> 0068:e0c15f14
> ---[ end trace 8105d0de6db48a92 ]---
>
>
> --
> In truth, death may be the only true freedom there is.
> 				- Kaworu Nagisa
>
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