[Bug 665509] [NEW] dvb access causes crash

[Daniel Newman]

Public bug reported:

Using Ubuntu 10.10, kernel 2.6.35-22-generic, an attempt to access a
Volar USB DVB causes a crash with message as shown:

[23507.659595] Pid: 2993, comm: scan Not tainted 2.6.35-22-generic #35-Ubuntu P3-P5G31/System Product Name
[23507.659598] RIP: 0010:[<ffffffff8143d38e>]  [<ffffffff8143d38e>] i2c_transfer+0x1e/0xf0
[23507.659602] RSP: 0018:ffff8800de35fb88  EFLAGS: 00010296
[23507.659605] RAX: 00000000ffffffa1 RBX: 00000000000000eb RCX: 0000000000000000
[23507.659607] RDX: 0000000000000002 RSI: ffff8800de35fbd8 RDI: 0000000000000002
[23507.659610] RBP: ffff8800de35fbc8 R08: ffff8800df805960 R09: 000000000e008d80
[23507.659612] R10: dead000000200200 R11: dead000000100100 R12: 0000000000000000
[23507.659615] R13: 0000000000000001 R14: 0000000000000002 R15: 0000000000000000
[23507.659618] FS:  00007f82a5368700(0000) GS:ffff880001f00000(0000) knlGS:0000000000000000
[23507.659621] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[23507.659623] CR2: 0000000000000012 CR3: 00000000ce80d000 CR4: 00000000000406e0
[23507.659626] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[23507.659628] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[23507.659631] Process scan (pid: 2993, threadinfo ffff8800de35e000, task ffff8800bee3adc0)
[23507.659633] Stack:
[23507.659635]  ffff8800c2af1600 ffff88011968b5a0 0000000000000020 00000000000000eb
[23507.659639] <0> 0000000000000000 0000000000000001 ffffc90005c04000 0000000000000000
[23507.659643] <0> ffff8800de35fc28 ffffffffa041c27e 0000000200000010 ffff8800de35fc08
[23507.659648] Call Trace:
[23507.659654]  [<ffffffffa041c27e>] dib7000p_read_word+0x6e/0xc0 [dib7000p]
[23507.659659]  [<ffffffffa041dfeb>] dib7000p_pid_filter_ctrl+0x2b/0xa0 [dib7000p]
[23507.659664]  [<ffffffffa03992ee>] ? usb_urb_submit+0x3e/0x84 [dvb_usb]
[23507.659670]  [<ffffffffa06ddbb9>] stk70x0p_pid_filter_ctrl+0x19/0x1c [dvb_usb_dib0700]
[23507.659674]  [<ffffffffa0398632>] dvb_usb_ctrl_feed+0x152/0x170 [dvb_usb]
[23507.659679]  [<ffffffffa0398683>] dvb_usb_start_feed+0x13/0x20 [dvb_usb]
[23507.659686]  [<ffffffffa06c23b3>] dmx_section_feed_start_filtering+0xf3/0x190 [dvb_core]
[23507.659691]  [<ffffffffa06c0547>] dvb_dmxdev_filter_start+0x1b7/0x3e0 [dvb_core]
[23507.659697]  [<ffffffffa06c0da8>] dvb_demux_do_ioctl+0x488/0x580 [dvb_core]
[23507.659702]  [<ffffffffa06beaff>] dvb_usercopy+0xbf/0x1a0 [dvb_core]
[23507.659707]  [<ffffffffa06c0920>] ? dvb_demux_do_ioctl+0x0/0x580 [dvb_core]
[23507.659713]  [<ffffffffa06bf3ef>] dvb_demux_ioctl+0x4f/0x80 [dvb_core]
[23507.659717]  [<ffffffff8116295d>] vfs_ioctl+0x3d/0xd0
[23507.659721]  [<ffffffff81163231>] do_vfs_ioctl+0x81/0x340
[23507.659724]  [<ffffffff81163571>] sys_ioctl+0x81/0xa0
[23507.659729]  [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b
[23507.659731] Code: e8 c8 6d f4 ff c9 c3 eb 04 90 90 90 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 0f 1f 44 00 00 b8 a1 ff ff ff 41 89 d6 <48> 8b 57 10 48 89 fb 49 89 f5 48 83 3a 00 0f 84 8e 00 00 00 65 
[23507.659765] RIP  [<ffffffff8143d38e>] i2c_transfer+0x1e/0xf0
[23507.659770]  RSP <ffff8800de35fb88>
[23507.659771] CR2: 0000000000000012
[23507.659774] ---[ end trace 4788dde860974ddd ]---

This was caused by scan, but any other program attempting to access the
device causes a similar result (me-tv and tvheadend have been tried).

Before upgrading to Ubuntu 10.10, this device was working normally under
tvheadend, me-tv or scan.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.35
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  dmn        2062 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe9fc000 irq 44'
   Mixer name	: 'Realtek ALC662 rev1'
   Components	: 'HDA:10ec0662,10438290,00100101'
   Controls      : 34
   Simple ctrls  : 18
Card1.Amixer.info:
 Card hw:1 'Webcam'/'ASUSTeK Computer Inc. ASUS USB2.0 Webcam at usb-0000:00:1d.7-1, high speed'
   Mixer name	: 'USB Mixer'
   Components	: 'USB0458:705a'
   Controls      : 2
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
   Capture channels: Mono
   Limits: Capture 0 - 1024
   Mono: Capture 1022 [100%] [21.99dB] [on]
Card2.Amixer.info:
 Card hw:2 'HDMI'/'HDA ATI HDMI at 0xfeafc000 irq 45'
   Mixer name	: 'ATI R6xx HDMI'
   Components	: 'HDA:1002aa01,00aa0100,00100000'
   Controls      : 4
   Simple ctrls  : 1
Card2.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Sat Oct 23 20:42:55 2010
HibernationDevice: RESUME=UUID=6e6722d8-8869-4d0a-9ce1-9fea4ed0b9e0
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
 
 vboxnet0  no wireless extensions.
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=06da8c6c-d07d-46e8-becf-5a4f4e3a31b1 ro quiet splash
ProcEnviron:
 LANG=en_AU.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
RfKill:
 
SourcePackage: linux
WpaSupplicantLog:
 
dmi.bios.date: 07/16/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0307
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P3-P5G31
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0307:bd07/16/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP3-P5G31:rvrx.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug maverick needs-upstream-testing regression-release

-- 
dvb access causes crash
https://bugs.launchpad.net/bugs/665509
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