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[Bug 1173723] [Regression 3.5->3.6, bisected] gspca_ov534: kernel oops when connecting Hercules Blog Webcam

 

Hi!

After update from 3.5 kernel to newer version I got kernel oops when I 
connect my Hercules Blog Webcam. The full error stacktrace is at the end 
of this e-mail.

Commit bisect revealed the regression at:
-------------------------
1bd7d6adc691993206cf7dd69f1aaf8dccb06677 is the first bad commit
commit 1bd7d6adc691993206cf7dd69f1aaf8dccb06677
Author: Antonio Ospite <ospite@xxxxxxxxxxxx>
Date: Wed May 16 18:42:46 2012 -0300

     [media] gspca_ov534: Convert to the control framework

     Signed-off-by: Antonio Ospite <ospite@xxxxxxxxxxxx>
     Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxxxx>
     Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxx>

:040000 040000 81bb6d86a59d2fca15fea4d43a8abe34354cf69e 
6b7c2077ae5d8bdea32864841b5cd14149c6a44a M drivers
-------------------------

I also try to change the gspca_ov534 module source (ov534.c) from the 
3.8 kernel and added some additional null checks in sd_start function 
and add the extensive logging to it. With those changes my webcam is 
working OK. As far as I can see, sd_start function is called couple of 
times, but when it is called the first time (when a usb cable was 
inserted), sd struct is almost empty and without null check this leads 
to kernel oops. Here is the part of test version log when sd_start was 
called first time:

sd_start: NO sd->hue!
sd_start: NO sd->saturation!
sd_start: NO sd->autogain!
sd_start: NO sd->autowhitebalance!
sd_start: NO sd->autoexposure!
sd_start: NO sd->gain!
sd_start: NO sd->exposure!
sd_start: NO sd->brightness!
sd_start: NO sd->contrast!
sd_start: NO sd->sharpness!
sd_start: NO sd->hflip and sd->vflip!
sd_start: NO sd->plfreq!

Additional info can be found here: 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173723/


Here is the error stacktrace:
kernel: [   52.679705] usb 3-2: new high-speed USB device number 2 using 
xhci_hcd
kernel: [   52.697906] usb 3-2: New USB device found, idVendor=06f8, 
idProduct=3002
kernel: [   52.697910] usb 3-2: New USB device strings: Mfr=1, 
Product=2, SerialNumber=0
kernel: [   52.697912] usb 3-2: Product: Hercules Blog Microphone
kernel: [   52.697914] usb 3-2: Manufacturer: Hercules Blog Webcam
kernel: [   52.708983] Linux video capture interface: v2.00
kernel: [   52.710778] gspca_main: v2.14.0 registered
kernel: [   52.712210] gspca_main: ov534-2.14.0 probing 06f8:3002
kernel: [   55.506311] BUG: unable to handle kernel NULL pointer 
dereference at 0000000000000050
kernel: [   55.506367] IP: [<ffffffffa03c1b01>] 
v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
kernel: [   55.506414] PGD 0
kernel: [   55.506429] Oops: 0000 [#1] SMP
kernel: [   55.506453] Modules linked in: gspca_ov534(+) gspca_main 
videodev rfcomm bnep ppdev bluetooth binfmt_misc snd_hda_codec_hdmi 
snd_hda_codec_realtek stir4200 irda crc_ccitt usblp snd_hda_intel 
snd_hda_codec snd_hwdep snd_pcm hid_generic snd_page_alloc snd_seq_midi 
snd_seq_midi_event usbhid snd_rawmidi snd_seq snd_seq_device snd_timer 
hid i915 snd psmouse drm_kms_helper serio_raw mei_me drm mei soundcore 
video i2c_algo_bit lpc_ich mac_hid coretemp lp parport firewire_ohci 
firewire_core crc_itu_t ahci libahci alx mdio r8169 mii [last unloaded: 
parport_pc]
kernel: [   55.506819] CPU: 3 PID: 4352 Comm: modprobe Not tainted 
3.11.0-031100rc2-generic #201307211535
kernel: [   55.506864] Hardware name: Gigabyte Technology Co., Ltd. To 
be filled by O.E.M./Z77-DS3H, BIOS F9 09/19/2012
kernel: [   55.506913] task: ffff8801c20f9770 ti: ffff8801ceaa0000 
task.ti: ffff8801ceaa0000
kernel: [   55.506952] RIP: 0010:[<ffffffffa03c1b01>] 
[<ffffffffa03c1b01>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
kernel: [   55.507005] RSP: 0018:ffff8801ceaa1af8  EFLAGS: 00010292
kernel: [   55.507033] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 
000000000001988b
kernel: [   55.507069] RDX: 000000000001988a RSI: ffffffffa032745a RDI: 
0000000000000000
kernel: [   55.507106] RBP: ffff8801ceaa1b28 R08: 0000000000017380 R09: 
ffffea0008419d80
kernel: [   55.507142] R10: ffffffff81538f5a R11: 0000000000000002 R12: 
ffffffffa03273dc
kernel: [   55.507178] R13: ffffffffa03273dc R14: 0000000000000000 R15: 
ffffffffa03270a0
kernel: [   55.507215] FS:  00007f72d564a740(0000) 
GS:ffff88021f380000(0000) knlGS:0000000000000000
kernel: [   55.507256] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: [   55.507286] CR2: 0000000000000050 CR3: 00000001bd1f0000 CR4: 
00000000001407e0
kernel: [   55.507323] Stack:
kernel: [   55.507335]  ffff8801ceaa1b28 ffffffffa0325cff 
ffff8801000001f4 ffff8801ceb44000
kernel: [   55.507380]  ffffffffa03273dc ffff8801ceb44000 
ffff8801ceaa1b58 ffffffffa032688e
kernel: [   55.507426]  ffff8801ceb44000 ffffffffa03274f0 
ffffffffa03274f0 ffff8801ceb44380
kernel: [   55.507471] Call Trace:
kernel: [   55.507490]  [<ffffffffa0325cff>] ? sccb_w_array+0x3f/0x80 
[gspca_ov534]
kernel: [   55.507527]  [<ffffffffa032688e>] sd_start+0xce/0x2b0 
[gspca_ov534]
kernel: [   55.507561]  [<ffffffffa0326bf9>] sd_init+0x189/0x1e8 
[gspca_ov534]
kernel: [   55.507596]  [<ffffffffa02a0c95>] 
gspca_dev_probe2+0x285/0x410 [gspca_main]
kernel: [   55.507634]  [<ffffffffa02a0e58>] gspca_dev_probe+0x38/0x60 
[gspca_main]
kernel: [   55.507670]  [<ffffffffa0325081>] sd_probe+0x21/0x30 
[gspca_ov534]
kernel: [   55.507706]  [<ffffffff8153c960>] usb_probe_interface+0x1c0/0x2f0
kernel: [   55.507740]  [<ffffffff8148758c>] really_probe+0x6c/0x330
kernel: [   55.507771]  [<ffffffff814879d7>] driver_probe_device+0x47/0xa0
kernel: [   55.507803]  [<ffffffff81487adb>] __driver_attach+0xab/0xb0
kernel: [   55.507834]  [<ffffffff81487a30>] ? driver_probe_device+0xa0/0xa0
kernel: [   55.507867]  [<ffffffff814857be>] bus_for_each_dev+0x5e/0x90
kernel: [   55.507899]  [<ffffffff8148714e>] driver_attach+0x1e/0x20
kernel: [   55.507929]  [<ffffffff81486bdc>] bus_add_driver+0x10c/0x290
kernel: [   55.507961]  [<ffffffff8148805d>] driver_register+0x7d/0x160
kernel: [   55.507993]  [<ffffffff8153b590>] usb_register_driver+0xa0/0x160
kernel: [   55.508027]  [<ffffffffa0067000>] ? 0xffffffffa0066fff
kernel: [   55.508056]  [<ffffffffa006701e>] sd_driver_init+0x1e/0x1000 
[gspca_ov534]
kernel: [   55.508094]  [<ffffffff8100212a>] do_one_initcall+0xfa/0x1b0
kernel: [   55.508126]  [<ffffffff810578c3>] ? set_memory_nx+0x43/0x50
kernel: [   55.508160]  [<ffffffff81712e8d>] do_init_module+0x80/0x1d1
kernel: [   55.508193]  [<ffffffff810d2079>] load_module+0x4c9/0x5f0
kernel: [   55.508223]  [<ffffffff810cf7b0>] ? add_kallsyms+0x210/0x210
kernel: [   55.508254]  [<ffffffff810d2254>] SyS_init_module+0xb4/0x100
kernel: [   55.508286]  [<ffffffff817333ef>] tracesys+0xe1/0xe6
kernel: [   55.508312] Code: a0 09 00 00 48 c7 c7 30 c3 3c a0 e8 7a 38 
ca e0 eb cf 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 
fb 48 83 ec 28 <8b> 47 50 83 e8 05 83 f8 02 77 09 80 b8 20 8c 3c a0 00 
74 1d 48
kernel: [   55.508559] RIP  [<ffffffffa03c1b01>] 
v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
kernel: [   55.510605]  RSP <ffff8801ceaa1af8>
kernel: [   55.512641] CR2: 0000000000000050
kernel: [   55.525424] ---[ end trace 6786f15abfd2ac90 ]---

-- 
Regards,
  Yaroslav

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1173723

Title:
  06f8:3002 BUG: unable to handle kernel NULL pointer dereference at
  0000000000000050; RIP: 0010:[<ffffffffa046ada1>] [<ffffffffa046ada1>]
  v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After update to 13.04 when I connecting my Hercules Blog Webcam, I got
  kernel oops. This camera was working OK in 12.10 with latest linux-
  image-3.8.0-19-generic kernel.

  Commit bisect revealed the regression at:
  -------------------------
  1bd7d6adc691993206cf7dd69f1aaf8dccb06677 is the first bad commit
  commit 1bd7d6adc691993206cf7dd69f1aaf8dccb06677
  Author: Antonio Ospite <ospite@xxxxxxxxxxxxxxxxx>
  Date: Wed May 16 18:42:46 2012 -0300

      [media] gspca_ov534: Convert to the control framework

      Signed-off-by: Antonio Ospite <ospite@xxxxxxxxxxxxxxxxx>
      Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
      Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>

  :040000 040000 81bb6d86a59d2fca15fea4d43a8abe34354cf69e 6b7c2077ae5d8bdea32864841b5cd14149c6a44a M drivers
  -------------------------

  Here is the error stacktrace:
  Apr 26 23:01:31 ZHOME kernel: [  430.706302] usb 3-1: new high-speed USB device number 2 using xhci_hcd
  Apr 26 23:01:31 ZHOME kernel: [  430.724458] usb 3-1: New USB device found, idVendor=06f8, idProduct=3002
  Apr 26 23:01:31 ZHOME kernel: [  430.724462] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
  Apr 26 23:01:31 ZHOME kernel: [  430.724465] usb 3-1: Product: Hercules Blog Microphone
  Apr 26 23:01:31 ZHOME kernel: [  430.724467] usb 3-1: Manufacturer: Hercules Blog Webcam
  Apr 26 23:01:31 ZHOME mtp-probe: checking bus 3, device 2: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-1"
  Apr 26 23:01:31 ZHOME mtp-probe: bus: 3, device: 2 was not an MTP device
  Apr 26 23:01:31 ZHOME kernel: [  430.737089] Linux video capture interface: v2.00
  Apr 26 23:01:31 ZHOME kernel: [  430.739566] gspca_main: v2.14.0 registered
  Apr 26 23:01:31 ZHOME kernel: [  430.741319] gspca_main: ov534-2.14.0 probing 06f8:3002
  Apr 26 23:01:33 ZHOME kernel: [  433.522117] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
  Apr 26 23:01:33 ZHOME kernel: [  433.522169] IP: [<ffffffffa046ada1>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
  Apr 26 23:01:33 ZHOME kernel: [  433.522213] PGD 0
  Apr 26 23:01:33 ZHOME kernel: [  433.522227] Oops: 0000 [#1] SMP
  Apr 26 23:01:33 ZHOME kernel: [  433.522251] Modules linked in: gspca_ov534(+) gspca_main videodev vmnet(OF) vsock(OF) vmci(OF) vmmon(OF) rfcomm parport_pc(F) ppdev(F) bnep bluetooth binfmt_misc(F) snd_hda_codec_hdmi snd_hda_codec_realtek stir4200 irda(F) crc_ccitt(F) usblp kvm_intel snd_hda_intel snd_hda_codec kvm snd_hwdep(F) snd_pcm(F) ghash_clmulni_intel(F) snd_page_alloc(F) aesni_intel(F) snd_seq_midi(F) snd_seq_midi_event(F) aes_x86_64(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F) cryptd(F) snd_rawmidi(F) hid_generic snd_seq(F) usbhid psmouse(F) hid snd_seq_device(F) snd_timer(F) snd(F) microcode(F) serio_raw(F) soundcore(F) alx lpc_ich mdio i915 mei drm_kms_helper video(F) drm i2c_algo_bit mac_hid coretemp lp(F) parport(F) firewire_ohci firewire_core crc_itu_t(F) ahci(F) libahci(F) r8169
  Apr 26 23:01:33 ZHOME kernel: [  433.522709] CPU 3
  Apr 26 23:01:33 ZHOME kernel: [  433.522724] Pid: 5284, comm: modprobe Tainted: GF          O 3.8.0-19-generic #29-Ubuntu Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-DS3H
  Apr 26 23:01:33 ZHOME kernel: [  433.522787] RIP: 0010:[<ffffffffa046ada1>]  [<ffffffffa046ada1>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
  Apr 26 23:01:33 ZHOME kernel: [  433.522837] RSP: 0018:ffff88011efabb88  EFLAGS: 00010296
  Apr 26 23:01:33 ZHOME kernel: [  433.522864] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000001820001c0
  Apr 26 23:01:33 ZHOME kernel: [  433.522897] RDX: 00000001820001c1 RSI: 00000000820001c0 RDI: 0000000000000000
  Apr 26 23:01:33 ZHOME kernel: [  433.522931] RBP: ffff88011efabba8 R08: 0000000000000000 R09: 0000000000000001
  Apr 26 23:01:33 ZHOME kernel: [  433.522965] R10: ffffea0007f734c0 R11: ffffffff814fd2a2 R12: ffffffffa03273fc
  Apr 26 23:01:33 ZHOME kernel: [  433.522998] R13: 00000000ffffffff R14: 0000000000000000 R15: ffff8801eabfb430
  Apr 26 23:01:33 ZHOME kernel: [  433.523033] FS:  00007fb6ab739740(0000) GS:ffff88021f380000(0000) knlGS:0000000000000000
  Apr 26 23:01:33 ZHOME kernel: [  433.523071] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Apr 26 23:01:33 ZHOME kernel: [  433.523098] CR2: 0000000000000050 CR3: 00000001d02d1000 CR4: 00000000001407e0
  Apr 26 23:01:33 ZHOME kernel: [  433.523132] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  Apr 26 23:01:33 ZHOME kernel: [  433.523166] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  Apr 26 23:01:33 ZHOME kernel: [  433.523201] Process modprobe (pid: 5284, threadinfo ffff88011efaa000, task ffff8801fdecae80)
  Apr 26 23:01:33 ZHOME kernel: [  433.523240] Stack:
  Apr 26 23:01:33 ZHOME kernel: [  433.523251]  ffffffffa0325424 ffff8801557b1000 ffffffffa03273fc ffff8801557b1000
  Apr 26 23:01:33 ZHOME kernel: [  433.523295]  ffff88011efabbd8 ffffffffa0326696 ffffffffa0327510 00000000ffffffff
  Apr 26 23:01:33 ZHOME kernel: [  433.523338]  ffff8801557b1000 ffff8801557b1000 ffff88011efabc00 ffffffffa032696d
  Apr 26 23:01:33 ZHOME kernel: [  433.523381] Call Trace:
  Apr 26 23:01:33 ZHOME kernel: [  433.523399]  [<ffffffffa0325424>] ? sccb_w_array+0x34/0x80 [gspca_ov534]
  Apr 26 23:01:33 ZHOME kernel: [  433.523434]  [<ffffffffa0326696>] sd_start+0xd6/0x250 [gspca_ov534]
  Apr 26 23:01:33 ZHOME kernel: [  433.523467]  [<ffffffffa032696d>] sd_init+0x15d/0x19c [gspca_ov534]
  Apr 26 23:01:33 ZHOME kernel: [  433.523500]  [<ffffffffa043df46>] gspca_dev_probe2+0x336/0x640 [gspca_main]
  Apr 26 23:01:33 ZHOME kernel: [  433.523535]  [<ffffffffa043e282>] gspca_dev_probe+0x32/0x60 [gspca_main]
  Apr 26 23:01:33 ZHOME kernel: [  433.523569]  [<ffffffffa0325081>] sd_probe+0x21/0x30 [gspca_ov534]
  Apr 26 23:01:33 ZHOME kernel: [  433.523602]  [<ffffffff8150095d>] usb_probe_interface+0x1ad/0x270
  Apr 26 23:01:33 ZHOME kernel: [  433.523635]  [<ffffffff814556c7>] driver_probe_device+0x77/0x230
  Apr 26 23:01:33 ZHOME kernel: [  433.523666]  [<ffffffff8145592b>] __driver_attach+0xab/0xb0
  Apr 26 23:01:33 ZHOME kernel: [  433.523695]  [<ffffffff81455880>] ? driver_probe_device+0x230/0x230
  Apr 26 23:01:33 ZHOME kernel: [  433.523727]  [<ffffffff814539dd>] bus_for_each_dev+0x5d/0xa0
  Apr 26 23:01:33 ZHOME kernel: [  433.523757]  [<ffffffff814551ce>] driver_attach+0x1e/0x20
  Apr 26 23:01:33 ZHOME kernel: [  433.523784]  [<ffffffff81454da0>] bus_add_driver+0x190/0x280
  Apr 26 23:01:33 ZHOME kernel: [  433.523815]  [<ffffffff81455ff7>] driver_register+0x77/0x170
  Apr 26 23:01:33 ZHOME kernel: [  433.523844]  [<ffffffff814ff32e>] usb_register_driver+0x8e/0x160
  Apr 26 23:01:33 ZHOME kernel: [  433.523877]  [<ffffffffa033d000>] ? 0xffffffffa033cfff
  Apr 26 23:01:33 ZHOME kernel: [  433.523905]  [<ffffffffa033d01e>] sd_driver_init+0x1e/0x1000 [gspca_ov534]
  Apr 26 23:01:33 ZHOME kernel: [  433.523940]  [<ffffffff8100215a>] do_one_initcall+0x12a/0x180
  Apr 26 23:01:33 ZHOME kernel: [  433.523973]  [<ffffffff810bfec7>] load_module+0x10c7/0x1520
  Apr 26 23:01:33 ZHOME kernel: [  433.524002]  [<ffffffff810bb830>] ? unset_module_init_ro_nx+0x80/0x80
  Apr 26 23:01:33 ZHOME kernel: [  433.524036]  [<ffffffff810c03e5>] sys_init_module+0xc5/0xf0
  Apr 26 23:01:33 ZHOME kernel: [  433.524067]  [<ffffffff816d379d>] system_call_fastpath+0x1a/0x1f
  Apr 26 23:01:33 ZHOME kernel: [  433.524096] Code: 72 09 00 00 48 c7 c7 e8 50 47 a0 e8 aa da be e0 eb cf 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 18 <8b> 47 50 83 e8 05 83 f8 02 77 09 80 b8 00 1a 47 a0 00 74 1d 48
  Apr 26 23:01:33 ZHOME kernel: [  433.524352] RIP  [<ffffffffa046ada1>] v4l2_ctrl_g_ctrl+0x11/0x60 [videodev]
  Apr 26 23:01:33 ZHOME kernel: [  433.524392]  RSP <ffff88011efabb88>
  Apr 26 23:01:33 ZHOME kernel: [  433.524409] CR2: 0000000000000050
  Apr 26 23:01:33 ZHOME kernel: [  433.540985] ---[ end trace 85e41a22106076c7 ]---
  Apr 26 23:01:33 ZHOME udevd[5282]: '/sbin/modprobe -bv usb:v06F8p3002d0100dc00dsc00dp00ic01isc02ip00in02' [5284] terminated by signal 9 (Killed)
  Apr 26 23:02:32 ZHOME udevd[583]: timeout: killing '/sbin/modprobe -bv usb:v06F8p3002d0100dc00dsc00dp00icFFisc00ip00in00' [5290]
  Apr 26 23:02:32 ZHOME udevd[584]: timeout: killing '/sbin/modprobe -bv usb:v06F8p3002d0100dc00dsc00dp00ic01isc01ip00in01' [5283]
  Apr 26 23:02:32 ZHOME udevd[583]: '/sbin/modprobe -bv usb:v06F8p3002d0100dc00dsc00dp00icFFisc00ip00in00' [5290] terminated by signal 9 (Killed)
  Apr 26 23:02:32 ZHOME udevd[584]: '/sbin/modprobe -bv usb:v06F8p3002d0100dc00dsc00dp00ic01isc01ip00in01' [5283] terminated by signal 9 (Killed)
  Apr 26 23:03:46 ZHOME kernel: [  565.748695] usb 3-1: USB disconnect, device number 2
  ---
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  slavik     1908 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=081f61a7-906d-4620-a633-a163ec180e52
  InstallationDate: Installed on 2012-12-23 (125 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=b93e0bf2-feef-48d4-8d48-c476c7bf6d5a ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  RfKill:

  Tags:  raring
  Uname: Linux 3.8.0-19-generic x86_64
  UpgradeStatus: Upgraded to raring on 2013-04-26 (1 days ago)
  UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo
  WifiSyslog:

  dmi.bios.date: 09/19/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F9
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z77-DS3H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF9:bd09/19/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ77-DS3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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