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Date:	Sun, 21 Oct 2012 12:34:53 +0200
From:	Daniel Mack <zonque@...il.com>
To:	"Artem S. Tashkinov" <t.artem@...os.com>
CC:	bp@...en8.de, pavel@....cz, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, security@...nel.org,
	linux-media@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: A reliable kernel panic (3.6.2) and system crash when visiting
 a particular website

On 21.10.2012 01:15, Artem S. Tashkinov wrote:
> You don't get me - I have *no* VirtualBox (or any proprietary) modules running
> - but I can reproduce this problem using *the same system running under* VirtualBox
> in Windows 7 64.
> 
> It's almost definitely either a USB driver bug or video4linux driver bug:
> 
> I'm CC'ing linux-media and linux-usb mailing lists, the problem is described here:
> https://lkml.org/lkml/2012/10/20/35
> https://lkml.org/lkml/2012/10/20/148
> 
> Here are  the last lines from my dmesg (with usbmon loaded):
> 
> [  292.164833] hub 1-0:1.0: state 7 ports 8 chg 0000 evt 0002
> [  292.168091] ehci_hcd 0000:00:1f.5: GetStatus port:1 status 00100a 0  ACK POWER sig=se0 PEC CSC
> [  292.172063] hub 1-0:1.0: port 1, status 0100, change 0003, 12 Mb/s
> [  292.174883] usb 1-1: USB disconnect, device number 2
> [  292.178045] usb 1-1: unregistering device
> [  292.183539] usb 1-1: unregistering interface 1-1:1.0
> [  292.197034] usb 1-1: unregistering interface 1-1:1.1
> [  292.204317] usb 1-1: unregistering interface 1-1:1.2
> [  292.234519] usb 1-1: unregistering interface 1-1:1.3
> [  292.236175] usb 1-1: usb_disable_device nuking all URBs
> [  292.364429] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x100
> [  294.364279] hub 1-0:1.0: hub_suspend
> [  294.366045] usb usb1: bus auto-suspend, wakeup 1
> [  294.367375] ehci_hcd 0000:00:1f.5: suspend root hub
> [  296.501084] usb usb1: usb wakeup-resume
> [  296.508311] usb usb1: usb auto-resume
> [  296.509833] ehci_hcd 0000:00:1f.5: resume root hub
> [  296.560149] hub 1-0:1.0: hub_resume
> [  296.562240] ehci_hcd 0000:00:1f.5: GetStatus port:1 status 001003 0  ACK POWER sig=se0 CSC CONNECT
> [  296.566141] hub 1-0:1.0: port 1: status 0501 change 0001
> [  296.670413] hub 1-0:1.0: state 7 ports 8 chg 0002 evt 0000
> [  296.673222] hub 1-0:1.0: port 1, status 0501, change 0000, 480 Mb/s
> [  297.311720] usb 1-1: new high-speed USB device number 3 using ehci_hcd
> [  300.547237] usb 1-1: skipped 1 descriptor after configuration
> [  300.549443] usb 1-1: skipped 4 descriptors after interface
> [  300.552273] usb 1-1: skipped 2 descriptors after interface
> [  300.556499] usb 1-1: skipped 1 descriptor after endpoint
> [  300.559392] usb 1-1: skipped 2 descriptors after interface
> [  300.560960] usb 1-1: skipped 1 descriptor after endpoint
> [  300.562169] usb 1-1: skipped 2 descriptors after interface
> [  300.563440] usb 1-1: skipped 1 descriptor after endpoint
> [  300.564639] usb 1-1: skipped 2 descriptors after interface
> [  300.565828] usb 1-1: skipped 2 descriptors after endpoint
> [  300.567084] usb 1-1: skipped 9 descriptors after interface
> [  300.569205] usb 1-1: skipped 1 descriptor after endpoint
> [  300.570484] usb 1-1: skipped 53 descriptors after interface
> [  300.595843] usb 1-1: default language 0x0409
> [  300.602503] usb 1-1: USB interface quirks for this device: 2
> [  300.605700] usb 1-1: udev 3, busnum 1, minor = 2
> [  300.606959] usb 1-1: New USB device found, idVendor=046d, idProduct=081d
> [  300.610298] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=1
> [  300.613742] usb 1-1: SerialNumber: 48C5D2B0
> [  300.617703] usb 1-1: usb_probe_device
> [  300.620594] usb 1-1: configuration #1 chosen from 1 choice
> [  300.639218] usb 1-1: adding 1-1:1.0 (config #1, interface 0)
> [  300.640736] snd-usb-audio 1-1:1.0: usb_probe_interface
> [  300.642307] snd-usb-audio 1-1:1.0: usb_probe_interface - got id
> [  301.050296] usb 1-1: adding 1-1:1.1 (config #1, interface 1)
> [  301.054897] usb 1-1: adding 1-1:1.2 (config #1, interface 2)
> [  301.056934] uvcvideo 1-1:1.2: usb_probe_interface
> [  301.058072] uvcvideo 1-1:1.2: usb_probe_interface - got id
> [  301.059395] uvcvideo: Found UVC 1.00 device <unnamed> (046d:081d)
> [  301.090173] input: UVC Camera (046d:081d) as /devices/pci0000:00/0000:00:1f.5/usb1/1-1/1-1:1.2/input/input7

That seems to be a Logitech model.

> [  301.111289] usb 1-1: adding 1-1:1.3 (config #1, interface 3)
> [  301.131207] usb 1-1: link qh16-0001/f48d64c0 start 2 [1/0 us]
> [  301.137066] usb 1-1: unlink qh16-0001/f48d64c0 start 2 [1/0 us]
> [  301.156451] ehci_hcd 0000:00:1f.5: reused qh f48d64c0 schedule
> [  301.158310] usb 1-1: link qh16-0001/f48d64c0 start 2 [1/0 us]
> [  301.160238] usb 1-1: unlink qh16-0001/f48d64c0 start 2 [1/0 us]
> [  301.196606] set resolution quirk: cval->res = 384
> [  371.309569] e1000: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
> [  390.729568] ehci_hcd 0000:00:1f.5: reused qh f48d64c0 schedule
> f5ade900 2296555[  390.730023] usb 1-1: link qh16-0001/f48d64c0 start 2 [1/0 us]
> 437 S Ii:1:003:7[  390.736394] usb 1-1: unlink qh16-0001/f48d64c0 start 2 [1/0 us]
>  -115:128 16 <
> f5ade900 2296566256 C Ii:1:003:7 -2:128 0
> [  391.100896] ehci_hcd 0000:00:1f.5: reused qh f48d64c0 schedule
> [  391.103188] usb 1-1: link qh16-0001/f48d64c0 start 2 [1/0 us]
> f5ade900 2296926929 S Ii:1:003:7[  391.104889] usb 1-1: unlink qh16-0001/f48d64c0 start 2 [1/0 us]
>  -115:128 16 <
> f5ade900 2296937889 C Ii:1:003:7 -2:128 0
> f5272300 2310382508 S Co:1:003:0 s 01 0b 0004 0001 0000 0
> f5272300 2310407888 C Co:1:003:0 0 0
> f5272300 2310408051 S Co:1:003:0 s 22 01 0100 0086 0003 3 = 80bb00
> f5272300 2310412456 C Co:1:003:0 0 3 >
> f5272300 2310412521 S Ci:1:003:0 s a2 81 0100 0086 0003 3 <
> f5272300 2310415909 C Ci:1:003:0 0 0
> f5272300 2310418133 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f5272600 2310418219 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f52720c0 2310418239 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f5272a80 2310418247 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f5272480 2310418256 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f52723c0 2310418264 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f5272d80 2310418272 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <
> f5272b40 2310418280 S Zi:1:003:6 -115:8:0 1 -18:0:100 100 <

At least this last packet was an isochronous input on ep 6 which has
state -EINPROGRESS, but that isn't necessarily related.

> Hard freeze with 100% CPU usage at this point as if some driver got into an
> infinite loop or something.

>From your first mail in this thread, I suspect that to be some sort of
memory corruption, but now you're seeing a hard freeze. Hmm.

> All debug options from https://lkml.org/lkml/2012/10/20/116 are enabled, but
> serial console is empty.

Some thoughts:

- As Alan asked, it would be interesting to separate video and audio
functions in this test, either by unloading the kernel modules one by
one or by disallowing Flash access to the devices.

- Can you reproduce this with some other webcam tool like "cheese"?

- Can you reproduce this with some other audio capture tool like
"arecord" (use "-D" to point it to the correct device, and play with
various sample rates and buffer sizes here)

- Do you have any built-in webcam or microphone? Does it work when you
use them instead?

- Does http://trust.com/service/guides/webcam/ also crash your kernel?

- if you can narrow down the issue to USB devices, please post the
output of "lsusb -v"

I tried Chrome 22 on Ubuntu with a cheap Logitech USB webcam (different
product ID than yours, though) under 3.6.0 and 3.6.2, and I can't
reproduce the issue.


Daniel

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