crash in uvc_status_cleanup

[P]

when using firefox Hello videochat application, the webcam crashes.

Step to reproduce:
1. start firefox Hello
2. click on start a conversation
3. the webcam starts and hello displays the video
4. just wait until the webcam disconnects

then the following appear in the syslog:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1411357/+attachment/4305725/+files/syslog

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-lowlatency 3.16.0.29.30
ProcVersionSignature: Ubuntu 3.16.0-29.39-lowlatency 3.16.7-ckt2
Uname: Linux 3.16.0-29-lowlatency x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: pascal 3177 F.... pulseaudio
 /dev/snd/pcmC0D0p: pascal 3177 F...m pulseaudio
 /dev/snd/controlC0: pascal 3177 F.... pulseaudio
CurrentDesktop: KDE
Date: Thu Jan 15 18:59:43 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-01-03 (12 days ago)
InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
IwConfig:
 eth0 no wireless extensions.

 virbr0 no wireless extensions.

 lo no wireless extensions.
MachineType: AOpen i965GMx-IF
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-29-lowlatency root=UUID=076b58d2-a51a-4802-a928-ddafdecc1b83 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-29-lowlatency N/A
 linux-backports-modules-3.16.0-29-lowlatency N/A
 linux-firmware 1.138.1
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/03/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: i965GMx-IF
dmi.board.vendor: AOpen
dmi.board.version: 558EX10I690
dmi.chassis.type: 3
dmi.chassis.vendor: AOpen
dmi.chassis.version: i965GMx-IF
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd10/03/2008:svnAOpen:pni965GMx-IF:pvrAO00001JW:rvnAOpen:rni965GMx-IF:rvr558EX10I690:cvnAOpen:ct3:cvri965GMx-IF:
dmi.product.name: i965GMx-IF
dmi.product.version: AO00001JW
dmi.sys.vendor: AOpen

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.19 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-rc4-vivid/

[P (p92)]

I tried latest mainline kernel available and the crash is still present.

# uname -a
Linux minipc 3.19.0-031900rc4-lowlatency #201501112135 SMP PREEMPT Sun Jan 11 21:42:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

First I notice that the webcam stops by itself after several seconds with the following trace in syslog :

Jan 15 19:26:35 minipc kernel: [ 214.121777] usb 2-4: USB disconnect, device number 3
Jan 15 19:26:35 minipc kernel: [ 214.125214] uvcvideo: Failed to resubmit video URB (-19).
Jan 15 19:26:35 minipc kernel: [ 214.528043] usb 2-4: new high-speed USB device number 6 using ehci-pci
Jan 15 19:26:35 minipc kernel: [ 214.823034] usb 2-4: new high-speed USB device number 7 using ehci-pci
Jan 15 19:26:36 minipc kernel: [ 215.194593] usb 2-4: New USB device found, idVendor=046d, idProduct=081d
Jan 15 19:26:36 minipc kernel: [ 215.194598] usb 2-4: New USB device strings: Mfr=0, Product=0, SerialNumber=1
Jan 15 19:26:36 minipc kernel: [ 215.452968] usb 2-4: set resolution quirk: cval->res = 384
Jan 15 19:26:36 minipc kernel: [ 215.453468] uvcvideo: Found UVC 1.00 device <unnamed> (046d:081d)
Jan 15 19:26:36 minipc kernel: [ 215.466056] input: UVC Camera (046d:081d) as /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.2/input/input14
Jan 15 19:26:36 minipc mtp-probe: checking bus 2, device 7: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-4"
Jan 15 19:26:36 minipc mtp-probe: bus: 2, device: 7 was not an MTP device
Jan 15 19:26:36 minipc rtkit-daemon[3019]: Successfully made thread 3492 of process 3017 (n/a) owned by '1000' RT at priority 5.
Jan 15 19:26:36 minipc rtkit-daemon[3019]: Supervising 4 threads of 1 processes of 1 users.
Jan 15 19:27:39 minipc dbus[897]: [system] Activating service name='org.debian.AptXapianIndex' (using servicehelper)
Jan 15 19:27:40 minipc dbus[897]: [system] Successfully activated service 'org.debian.AptXapianIndex'
Jan 15 19:27:47 minipc kernel: [ 286.803565] perf interrupt took too long (2504 > 2500), lowering kernel.perf_event_max_sample_rate to 50000

then when clicking on Hello disconnect button we have the 4 same crashes appearing at once in syslog

Jan 15 19:29:14 minipc kernel: [ 373.240109] ------------[ cut here ]------------
Jan 15 19:29:14 minipc kernel: [ 373.240124] WARNING: CPU: 1 PID: 3451 at /home/apw/COD/linux/fs/sysfs/group.c:219 sysfs_remove_group+0xa3/0xb0()
Jan 15 19:29:14 minipc kernel: [ 373.240126] sysfs group ffffffff81cb7260 not found for kobject 'event8'
Jan 15 19:29:14 minipc kernel: [ 373.240128] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp iptable_filter ip_tables x_tables bridge ...

[penalvch (penalvch)]

Cut from report description.

[penalvch (penalvch)]

PascalC, did this problem not occur in a release prior to Utopic?

As well, could you please test the latest mainline kernel 3.19-rc6 and advise to the results?

[P (p92)]

This is the result with
Linux minipc 3.19.0-031900rc6-lowlatency #201501261152 SMP PREEMPT Mon Jan 26 17:02:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

see attachement for syslog.

Jan 28 19:54:49 minipc kernel: [ 1344.093797] ------------[ cut here ]------------
Jan 28 19:54:49 minipc kernel: [ 1344.093801] WARNING: CPU: 0 PID: 3412 at /home/kernel/COD/linux/fs/sysfs/group.c:219 sysfs_remove_group+0xa3/0xb0()
Jan 28 19:54:49 minipc kernel: [ 1344.093803] sysfs group ffffffff81cb72a0 not found for kobject 'media0'
Jan 28 19:54:49 minipc kernel: [ 1344.093804] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi nfsv3 dm_crypt rpcsec_gss_krb5 nfsv4 ir_lirc_codec ir_xmp_decoder lirc_dev ir_mce_kbd_decoder pl2303 usbserial ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_rc5_decoder ir_nec_decoder rc_rc6_mce mceusb rc_core bnep rfcomm bluetooth snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel nfsd snd_hda_controller snd_usb_audio auth_rpcgss snd_hda_codec nfs_acl nfs lockd grace binfmt_misc sunrpc coretemp snd_usbmidi_lib fscache snd_hwdep kvm_intel snd_seq_midi snd_seq_midi_event kvm snd_rawmidi uvcvideo videobuf2_vmalloc videobuf2_memops serio_raw snd_pcm videobuf2_core v4l2_common joydev snd_seq videodev media snd_seq_device snd_timer lpc_ich snd soundcore mac_hid parport_pc ppdev lp parport btrfs xor raid6_pq hid_generic i915 firewire_ohci firewire_core psmouse crc_itu_t video i2c_algo_bit drm_kms_helper pata_acpi drm e1000e ptp pps_core usbhid hid
Jan 28 19:54:49 minipc kernel: [ 1344.093881] CPU: 0 PID: 3412 Comm: MediaManager Tainted: G W 3.19.0-031900rc6-lowlatency #201501261152
Jan 28 19:54:49 minipc kernel: [ 1344.093883] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
Jan 28 19:54:49 minipc kernel: [ 1344.093884] 00000000000000db ffff8800cafdfbc8 ffffffff817c8e7a 0000000000000007
Jan 28 19:54:49 minipc kernel: [ 1344.093887] ffff8800cafdfc18 ffff8800cafdfc08 ffffffff81078697 ffff8800cafdfbf8
Jan 28 19:54:49 minipc kernel: [ 1344.093890] ffffffff81cb72a0 ffff8800ca566898 0000000000000000 ffff88012aae2f20
Jan 28 19:54:49 minipc kernel: [ 1344.093894] Call Trace:
Jan 28 19:54:49 minipc kernel: [ 1344.093897] [<ffffffff817c8e7a>] dump_stack+0x4c/0x6e
Jan 28 19:54:49 minipc kernel: [ 1344.093900] [<ffffffff81078697>] warn_slowpath_common+0x97/0xe0
Jan 28 19:54:49 minipc kernel: [ 1344.093903] [<ffffffff81078796>] warn_slowpath_fmt+0x46/0x50
Jan 28 19:54:49 minipc kernel: [ 1344.093906] [<ffffffff8126c543>] ? kernfs_find_and_get_ns+0x53/0x70
Jan 28 19:54:49 minipc kernel: [ 1344.093910] [<ffffffff81270793>] sysfs_remove_group+0xa3/0xb0
Jan 28 19:54:49 minipc kernel: [ 1344.093913] [<ffffffff81503b99>] dpm_sysfs_remove+0x59/0x70
Jan 28 19:54:49 minipc kernel: [ 1344.093916] [<ffffffff814f7b46>] device_del+0x56/0x230
Jan 28 19:54:49 minipc kernel: ...

[penalvch (penalvch)]

PascalC, did this problem not occur in a release prior to Utopic?

[P (p92)]

I cannot answer since this firefox application did not exist prior to utopic.

----- Mail original -----
De: "Christopher M. Penalver" <email address hidden>
À: <email address hidden>
Envoyé: Jeudi 29 Janvier 2015 11:24:15
Objet: [Bug 1411357] Re: crash in uvc_status_cleanup

PascalC, did this problem not occur in a release prior to Utopic?

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Title:
  crash in uvc_status_cleanup

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[penalvch (penalvch)]

PascalC, the issue you are reporting is an upstream one. Could you please report this problem to the appropriate mailing list (linux-media) by following the instructions verbatim at https://wiki.ubuntu.com/Bugs/Upstream/kernel ?

Please provide a direct URL to your e-mail to the mailing list once you have made it so that it may be tracked via http://vger.kernel.org/vger-lists.html . It can take a day for the new e-mail to show up in the respective archive.

Thank you for your understanding.

[P (p92)]

I've tested 3.19.0-031900rc7-lowlatency and it seems to fix the problem.