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[Bug 1411357] Re: crash in uvc_status_cleanup

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Cut from report description.

** Attachment added: "syslog"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1411357/+attachment/4305725/+files/syslog

** Description changed:

  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 :
- 
- 
- Jan 15 18:57:26 minipc kernel: [ 2905.741347] usb 2-4: USB disconnect, device number 7
- Jan 15 18:57:26 minipc kernel: [ 2905.742553] uvcvideo: Failed to resubmit video URB (-19).
- Jan 15 18:57:26 minipc kernel: [ 2905.964033] usb 2-4: new high-speed USB device number 8 using ehci-pci
- Jan 15 18:57:27 minipc kernel: [ 2906.334628] usb 2-4: New USB device found, idVendor=046d, idProduct=081d
- Jan 15 18:57:27 minipc kernel: [ 2906.334633] usb 2-4: New USB device strings: Mfr=0, Product=0, SerialNumber=1
- Jan 15 18:57:27 minipc kernel: [ 2906.334636] usb 2-4: SerialNumber: 451406C0
- Jan 15 18:57:27 minipc kernel: [ 2906.593255] usb 2-4: set resolution quirk: cval->res = 384
- Jan 15 18:57:27 minipc kernel: [ 2906.593705] uvcvideo: Found UVC 1.00 device <unnamed> (046d:081d)
- Jan 15 18:57:27 minipc kernel: [ 2906.606593] input: UVC Camera (046d:081d) as /devices/pci0000:00/0000:00:1d.7/usb2/2-4/2-4:1.2/input/input17
- Jan 15 18:57:27 minipc mtp-probe: checking bus 2, device 8: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-4"
- Jan 15 18:57:27 minipc mtp-probe: bus: 2, device: 8 was not an MTP device
- Jan 15 18:57:27 minipc rtkit-daemon[3179]: Successfully made thread 5057 of process 3177 (n/a) owned by '1000' RT at priority 5.
- Jan 15 18:57:27 minipc rtkit-daemon[3179]: Supervising 4 threads of 1 processes of 1 users.
- 
- Jan 15 18:58:07 minipc kernel: [ 2946.177078] ------------[ cut here ]------------
- Jan 15 18:58:07 minipc kernel: [ 2946.177094] WARNING: CPU: 1 PID: 4716 at /build/buildd/linux-3.16.0/fs/sysfs/group.c:219 sysfs_remove_group+0x99/0xa0()
- Jan 15 18:58:07 minipc kernel: [ 2946.177096] sysfs group ffffffff81cbe920 not found for kobject 'event10'
- Jan 15 18:58:07 minipc kernel: [ 2946.177098] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_usb_audio snd_usbmidi_lib xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc nfsv3 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bnep rfcomm bluetooth 6lowpan_iphc rpcsec_gss_krb5 dm_crypt nfsv4 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache ir_lirc_codec ir_mce_kbd_decoder lirc_dev ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_nec_decoder ir_rc5_decoder rc_rc6_mce pl2303 usbserial mceusb rc_core joydev coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_intel snd_hda_controller serio_raw snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd lpc_ich soundcore mac_hid parport_pc ppdev lp parport hid_generic usbhid hid i915 video i2c_algo_bit drm_kms_helper psmouse drm e1000e firewire_ohci firewire_core ptp crc_itu_t pata_acpi pps_core
- Jan 15 18:58:07 minipc kernel: [ 2946.177199] CPU: 1 PID: 4716 Comm: MediaManager Tainted: G        W     3.16.0-29-lowlatency #39-Ubuntu
- Jan 15 18:58:07 minipc kernel: [ 2946.177201] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
- Jan 15 18:58:07 minipc kernel: [ 2946.177203]  0000000000000009 ffff8800747d7c10 ffffffff8178100b ffff8800747d7c58
- Jan 15 18:58:07 minipc kernel: [ 2946.177207]  ffff8800747d7c48 ffffffff8107199d 0000000000000000 ffffffff81cbe920
- Jan 15 18:58:07 minipc kernel: [ 2946.177210]  ffff88011e047cc0 ffff880123c55898 ffff88012953a520 ffff8800747d7ca8
- Jan 15 18:58:07 minipc kernel: [ 2946.177213] Call Trace:
- Jan 15 18:58:07 minipc kernel: [ 2946.177221]  [<ffffffff8178100b>] dump_stack+0x4d/0x6f
- Jan 15 18:58:07 minipc kernel: [ 2946.177226]  [<ffffffff8107199d>] warn_slowpath_common+0x7d/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.177229]  [<ffffffff81071a0c>] warn_slowpath_fmt+0x4c/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.177233]  [<ffffffff81258ed8>] ? kernfs_find_and_get_ns+0x48/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.177236]  [<ffffffff8125c949>] sysfs_remove_group+0x99/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.177240]  [<ffffffff814da277>] dpm_sysfs_remove+0x57/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.177245]  [<ffffffff814cf4b5>] device_del+0x45/0x1d0
- Jan 15 18:58:07 minipc kernel: [ 2946.177248]  [<ffffffff815d28a3>] evdev_disconnect+0x23/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.177252]  [<ffffffff815cf01f>] __input_unregister_device+0xaf/0x160
- Jan 15 18:58:07 minipc kernel: [ 2946.177255]  [<ffffffff815cf18d>] input_unregister_device+0x4d/0x80
- Jan 15 18:58:07 minipc kernel: [ 2946.177262]  [<ffffffffc0b95172>] uvc_status_cleanup+0x42/0x50 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.177266]  [<ffffffffc0b8a1fd>] uvc_delete+0x2d/0x180 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.177269]  [<ffffffffc0b8a439>] uvc_release+0x29/0x30 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.177279]  [<ffffffffc0b4a9f9>] v4l2_device_release+0xd9/0x110 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.177283]  [<ffffffff814ced02>] device_release+0x32/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.177287]  [<ffffffff813a136a>] kobject_release+0x7a/0x1c0
- Jan 15 18:58:07 minipc kernel: [ 2946.177290]  [<ffffffff813a120d>] kobject_put+0x2d/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.177293]  [<ffffffff814cf017>] put_device+0x17/0x20
- Jan 15 18:58:07 minipc kernel: [ 2946.177298]  [<ffffffffc0b49491>] v4l2_release+0x51/0x80 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.177301]  [<ffffffff811e4593>] __fput+0xd3/0x230
- Jan 15 18:58:07 minipc kernel: [ 2946.177304]  [<ffffffff811e473e>] ____fput+0xe/0x10
- Jan 15 18:58:07 minipc kernel: [ 2946.177308]  [<ffffffff810926d7>] task_work_run+0xb7/0xf0
- Jan 15 18:58:07 minipc kernel: [ 2946.177313]  [<ffffffff81015267>] do_notify_resume+0x97/0xb0
- Jan 15 18:58:07 minipc kernel: [ 2946.177318]  [<ffffffff81788cea>] int_signal+0x12/0x17
- Jan 15 18:58:07 minipc kernel: [ 2946.177320] ---[ end trace 167074d7c3fac550 ]---
- Jan 15 18:58:07 minipc kernel: [ 2946.184034] ------------[ cut here ]------------
- 
- Jan 15 18:58:07 minipc kernel: [ 2946.184045] WARNING: CPU: 1 PID: 4716 at /build/buildd/linux-3.16.0/fs/sysfs/group.c:219 sysfs_remove_group+0x99/0xa0()
- Jan 15 18:58:07 minipc kernel: [ 2946.184047] sysfs group ffffffff81cbe920 not found for kobject 'input16'
- Jan 15 18:58:07 minipc kernel: [ 2946.184049] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_usb_audio snd_usbmidi_lib xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc nfsv3 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bnep rfcomm bluetooth 6lowpan_iphc rpcsec_gss_krb5 dm_crypt nfsv4 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache ir_lirc_codec ir_mce_kbd_decoder lirc_dev ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_nec_decoder ir_rc5_decoder rc_rc6_mce pl2303 usbserial mceusb rc_core joydev coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_intel snd_hda_controller serio_raw snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd lpc_ich soundcore mac_hid parport_pc ppdev lp parport hid_generic usbhid hid i915 video i2c_algo_bit drm_kms_helper psmouse drm e1000e firewire_ohci firewire_core ptp crc_itu_t pata_acpi pps_core
- Jan 15 18:58:07 minipc kernel: [ 2946.184137] CPU: 1 PID: 4716 Comm: MediaManager Tainted: G        W     3.16.0-29-lowlatency #39-Ubuntu
- Jan 15 18:58:07 minipc kernel: [ 2946.184139] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
- Jan 15 18:58:07 minipc kernel: [ 2946.184141]  0000000000000009 ffff8800747d7c38 ffffffff8178100b ffff8800747d7c80
- Jan 15 18:58:07 minipc kernel: [ 2946.184144]  ffff8800747d7c70 ffffffff8107199d 0000000000000000 ffffffff81cbe920
- Jan 15 18:58:07 minipc kernel: [ 2946.184147]  ffff880123c53a58 ffff880123c55898 ffff88012953a520 ffff8800747d7cd0
- Jan 15 18:58:07 minipc kernel: [ 2946.184151] Call Trace:
- Jan 15 18:58:07 minipc kernel: [ 2946.184157]  [<ffffffff8178100b>] dump_stack+0x4d/0x6f
- Jan 15 18:58:07 minipc kernel: [ 2946.184161]  [<ffffffff8107199d>] warn_slowpath_common+0x7d/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184164]  [<ffffffff81071a0c>] warn_slowpath_fmt+0x4c/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.184167]  [<ffffffff81258ed8>] ? kernfs_find_and_get_ns+0x48/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184170]  [<ffffffff8125c949>] sysfs_remove_group+0x99/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184175]  [<ffffffff814da277>] dpm_sysfs_remove+0x57/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184178]  [<ffffffff814cf4b5>] device_del+0x45/0x1d0
- Jan 15 18:58:07 minipc kernel: [ 2946.184183]  [<ffffffff815cf0ac>] __input_unregister_device+0x13c/0x160
- Jan 15 18:58:07 minipc kernel: [ 2946.184186]  [<ffffffff815cf18d>] input_unregister_device+0x4d/0x80
- Jan 15 18:58:07 minipc kernel: [ 2946.184192]  [<ffffffffc0b95172>] uvc_status_cleanup+0x42/0x50 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184195]  [<ffffffffc0b8a1fd>] uvc_delete+0x2d/0x180 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184199]  [<ffffffffc0b8a439>] uvc_release+0x29/0x30 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184208]  [<ffffffffc0b4a9f9>] v4l2_device_release+0xd9/0x110 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184211]  [<ffffffff814ced02>] device_release+0x32/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184215]  [<ffffffff813a136a>] kobject_release+0x7a/0x1c0
- Jan 15 18:58:07 minipc kernel: [ 2946.184218]  [<ffffffff813a120d>] kobject_put+0x2d/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184221]  [<ffffffff814cf017>] put_device+0x17/0x20
- Jan 15 18:58:07 minipc kernel: [ 2946.184225]  [<ffffffffc0b49491>] v4l2_release+0x51/0x80 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184229]  [<ffffffff811e4593>] __fput+0xd3/0x230
- Jan 15 18:58:07 minipc kernel: [ 2946.184232]  [<ffffffff811e473e>] ____fput+0xe/0x10
- Jan 15 18:58:07 minipc kernel: [ 2946.184235]  [<ffffffff810926d7>] task_work_run+0xb7/0xf0
- Jan 15 18:58:07 minipc kernel: [ 2946.184239]  [<ffffffff81015267>] do_notify_resume+0x97/0xb0
- Jan 15 18:58:07 minipc kernel: [ 2946.184243]  [<ffffffff81788cea>] int_signal+0x12/0x17
- Jan 15 18:58:07 minipc kernel: [ 2946.184245] ---[ end trace 167074d7c3fac551 ]---
- Jan 15 18:58:07 minipc kernel: [ 2946.184256] ------------[ cut here ]------------
- Jan 15 18:58:07 minipc kernel: [ 2946.184260] WARNING: CPU: 1 PID: 4716 at /build/buildd/linux-3.16.0/fs/sysfs/group.c:219 sysfs_remove_group+0x99/0xa0()
- Jan 15 18:58:07 minipc kernel: [ 2946.184261] sysfs group ffffffff81cd6dc0 not found for kobject 'input16'
- Jan 15 18:58:07 minipc kernel: [ 2946.184263] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_usb_audio snd_usbmidi_lib xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc nfsv3 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bnep rfcomm bluetooth 6lowpan_iphc rpcsec_gss_krb5 dm_crypt nfsv4 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache ir_lirc_codec ir_mce_kbd_decoder lirc_dev ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_nec_decoder ir_rc5_decoder rc_rc6_mce pl2303 usbserial mceusb rc_core joydev coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_intel snd_hda_controller serio_raw snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd lpc_ich soundcore mac_hid parport_pc ppdev lp parport hid_generic usbhid hid i915 video i2c_algo_bit drm_kms_helper psmouse drm e1000e firewire_ohci firewire_core ptp crc_itu_t pata_acpi pps_core
- Jan 15 18:58:07 minipc kernel: [ 2946.184330] CPU: 1 PID: 4716 Comm: MediaManager Tainted: G        W     3.16.0-29-lowlatency #39-Ubuntu
- Jan 15 18:58:07 minipc kernel: [ 2946.184332] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
- Jan 15 18:58:07 minipc kernel: [ 2946.184333]  0000000000000009 ffff8800747d7c00 ffffffff8178100b ffff8800747d7c48
- Jan 15 18:58:07 minipc kernel: [ 2946.184336]  ffff8800747d7c38 ffffffff8107199d 0000000000000000 ffffffff81cd6dc0
- Jan 15 18:58:07 minipc kernel: [ 2946.184339]  ffff880123c53a58 ffffffff81cd6bc0 ffff88012953a520 ffff8800747d7c98
- Jan 15 18:58:07 minipc kernel: [ 2946.184342] Call Trace:
- Jan 15 18:58:07 minipc kernel: [ 2946.184345]  [<ffffffff8178100b>] dump_stack+0x4d/0x6f
- Jan 15 18:58:07 minipc kernel: [ 2946.184349]  [<ffffffff8107199d>] warn_slowpath_common+0x7d/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184351]  [<ffffffff81071a0c>] warn_slowpath_fmt+0x4c/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.184354]  [<ffffffff81258ed8>] ? kernfs_find_and_get_ns+0x48/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184357]  [<ffffffff8125c949>] sysfs_remove_group+0x99/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184360]  [<ffffffff8125ca23>] sysfs_remove_groups+0x33/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.184363]  [<ffffffff814cec3e>] device_remove_attrs+0x5e/0x80
- Jan 15 18:58:07 minipc kernel: [ 2946.184366]  [<ffffffff814cf591>] device_del+0x121/0x1d0
- Jan 15 18:58:07 minipc kernel: [ 2946.184369]  [<ffffffff815cf0ac>] __input_unregister_device+0x13c/0x160
- Jan 15 18:58:07 minipc kernel: [ 2946.184372]  [<ffffffff815cf18d>] input_unregister_device+0x4d/0x80
- Jan 15 18:58:07 minipc kernel: [ 2946.184376]  [<ffffffffc0b95172>] uvc_status_cleanup+0x42/0x50 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184380]  [<ffffffffc0b8a1fd>] uvc_delete+0x2d/0x180 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184383]  [<ffffffffc0b8a439>] uvc_release+0x29/0x30 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184388]  [<ffffffffc0b4a9f9>] v4l2_device_release+0xd9/0x110 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184391]  [<ffffffff814ced02>] device_release+0x32/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184394]  [<ffffffff813a136a>] kobject_release+0x7a/0x1c0
- Jan 15 18:58:07 minipc kernel: [ 2946.184397]  [<ffffffff813a120d>] kobject_put+0x2d/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184400]  [<ffffffff814cf017>] put_device+0x17/0x20
- Jan 15 18:58:07 minipc kernel: [ 2946.184404]  [<ffffffffc0b49491>] v4l2_release+0x51/0x80 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184407]  [<ffffffff811e4593>] __fput+0xd3/0x230
- Jan 15 18:58:07 minipc kernel: [ 2946.184410]  [<ffffffff811e473e>] ____fput+0xe/0x10
- Jan 15 18:58:07 minipc kernel: [ 2946.184413]  [<ffffffff810926d7>] task_work_run+0xb7/0xf0
- Jan 15 18:58:07 minipc kernel: [ 2946.184416]  [<ffffffff81015267>] do_notify_resume+0x97/0xb0
- Jan 15 18:58:07 minipc kernel: [ 2946.184419]  [<ffffffff81788cea>] int_signal+0x12/0x17
- Jan 15 18:58:07 minipc kernel: [ 2946.184421] ---[ end trace 167074d7c3fac552 ]---
- Jan 15 18:58:07 minipc kernel: [ 2946.184422] ------------[ cut here ]------------
- Jan 15 18:58:07 minipc kernel: [ 2946.184425] WARNING: CPU: 1 PID: 4716 at /build/buildd/linux-3.16.0/fs/sysfs/group.c:219 sysfs_remove_group+0x99/0xa0()
- Jan 15 18:58:07 minipc kernel: [ 2946.184427] sysfs group ffffffff81cd6c20 not found for kobject 'input16'
- Jan 15 18:58:07 minipc kernel: [ 2946.184428] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_usb_audio snd_usbmidi_lib xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc nfsv3 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bnep rfcomm bluetooth 6lowpan_iphc rpcsec_gss_krb5 dm_crypt nfsv4 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache ir_lirc_codec ir_mce_kbd_decoder lirc_dev ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_nec_decoder ir_rc5_decoder rc_rc6_mce pl2303 usbserial mceusb rc_core joydev coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_intel snd_hda_controller serio_raw snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd lpc_ich soundcore mac_hid parport_pc ppdev lp parport hid_generic usbhid hid i915 video i2c_algo_bit drm_kms_helper psmouse drm e1000e firewire_ohci firewire_core ptp crc_itu_t pata_acpi pps_core
- Jan 15 18:58:07 minipc kernel: [ 2946.184496] CPU: 1 PID: 4716 Comm: MediaManager Tainted: G        W     3.16.0-29-lowlatency #39-Ubuntu
- Jan 15 18:58:07 minipc kernel: [ 2946.184497] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
- Jan 15 18:58:07 minipc kernel: [ 2946.184499]  0000000000000009 ffff8800747d7c00 ffffffff8178100b ffff8800747d7c48
- Jan 15 18:58:07 minipc kernel: [ 2946.184502]  ffff8800747d7c38 ffffffff8107199d 0000000000000000 ffffffff81cd6c20
- Jan 15 18:58:07 minipc kernel: [ 2946.184505]  ffff880123c53a58 ffffffff81cd6bc0 ffff88012953a520 ffff8800747d7c98
- Jan 15 18:58:07 minipc kernel: [ 2946.184508] Call Trace:
- Jan 15 18:58:07 minipc kernel: [ 2946.184511]  [<ffffffff8178100b>] dump_stack+0x4d/0x6f
- Jan 15 18:58:07 minipc kernel: [ 2946.184514]  [<ffffffff8107199d>] warn_slowpath_common+0x7d/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184517]  [<ffffffff81071a0c>] warn_slowpath_fmt+0x4c/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.184520]  [<ffffffff81258ed8>] ? kernfs_find_and_get_ns+0x48/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184522]  [<ffffffff8125c949>] sysfs_remove_group+0x99/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184525]  [<ffffffff8125ca23>] sysfs_remove_groups+0x33/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.184528]  [<ffffffff814cec3e>] device_remove_attrs+0x5e/0x80
- Jan 15 18:58:07 minipc kernel: [ 2946.184531]  [<ffffffff814cf591>] device_del+0x121/0x1d0
- Jan 15 18:58:07 minipc kernel: [ 2946.184534]  [<ffffffff815cf0ac>] __input_unregister_device+0x13c/0x160
- Jan 15 18:58:07 minipc kernel: [ 2946.184537]  [<ffffffff815cf18d>] input_unregister_device+0x4d/0x80
- Jan 15 18:58:07 minipc kernel: [ 2946.184541]  [<ffffffffc0b95172>] uvc_status_cleanup+0x42/0x50 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184545]  [<ffffffffc0b8a1fd>] uvc_delete+0x2d/0x180 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184548]  [<ffffffffc0b8a439>] uvc_release+0x29/0x30 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184553]  [<ffffffffc0b4a9f9>] v4l2_device_release+0xd9/0x110 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184556]  [<ffffffff814ced02>] device_release+0x32/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184559]  [<ffffffff813a136a>] kobject_release+0x7a/0x1c0
- Jan 15 18:58:07 minipc kernel: [ 2946.184562]  [<ffffffff813a120d>] kobject_put+0x2d/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184565]  [<ffffffff814cf017>] put_device+0x17/0x20
- Jan 15 18:58:07 minipc kernel: [ 2946.184570]  [<ffffffffc0b49491>] v4l2_release+0x51/0x80 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184572]  [<ffffffff811e4593>] __fput+0xd3/0x230
- Jan 15 18:58:07 minipc kernel: [ 2946.184575]  [<ffffffff811e473e>] ____fput+0xe/0x10
- Jan 15 18:58:07 minipc kernel: [ 2946.184578]  [<ffffffff810926d7>] task_work_run+0xb7/0xf0
- Jan 15 18:58:07 minipc kernel: [ 2946.184581]  [<ffffffff81015267>] do_notify_resume+0x97/0xb0
- Jan 15 18:58:07 minipc kernel: [ 2946.184584]  [<ffffffff81788cea>] int_signal+0x12/0x17
- Jan 15 18:58:07 minipc kernel: [ 2946.184586] ---[ end trace 167074d7c3fac553 ]---
- Jan 15 18:58:07 minipc kernel: [ 2946.184691] ------------[ cut here ]------------
- Jan 15 18:58:07 minipc kernel: [ 2946.184696] WARNING: CPU: 1 PID: 4716 at /build/buildd/linux-3.16.0/fs/sysfs/group.c:219 sysfs_remove_group+0x99/0xa0()
- Jan 15 18:58:07 minipc kernel: [ 2946.184697] sysfs group ffffffff81cbe920 not found for kobject 'media0'
- Jan 15 18:58:07 minipc kernel: [ 2946.184699] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_usb_audio snd_usbmidi_lib xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc nfsv3 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bnep rfcomm bluetooth 6lowpan_iphc rpcsec_gss_krb5 dm_crypt nfsv4 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache ir_lirc_codec ir_mce_kbd_decoder lirc_dev ir_sharp_decoder ir_sanyo_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder ir_nec_decoder ir_rc5_decoder rc_rc6_mce pl2303 usbserial mceusb rc_core joydev coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_intel snd_hda_controller serio_raw snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd lpc_ich soundcore mac_hid parport_pc ppdev lp parport hid_generic usbhid hid i915 video i2c_algo_bit drm_kms_helper psmouse drm e1000e firewire_ohci firewire_core ptp crc_itu_t pata_acpi pps_core
- Jan 15 18:58:07 minipc kernel: [ 2946.184768] CPU: 1 PID: 4716 Comm: MediaManager Tainted: G        W     3.16.0-29-lowlatency #39-Ubuntu
- Jan 15 18:58:07 minipc kernel: [ 2946.184769] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
- Jan 15 18:58:07 minipc kernel: [ 2946.184771]  0000000000000009 ffff8800747d7c38 ffffffff8178100b ffff8800747d7c80
- Jan 15 18:58:07 minipc kernel: [ 2946.184774]  ffff8800747d7c70 ffffffff8107199d 0000000000000000 ffffffff81cbe920
- Jan 15 18:58:07 minipc kernel: [ 2946.184777]  ffff880123c51898 ffff880123c55898 ffff88012953a520 ffff8800747d7cd0
- Jan 15 18:58:07 minipc kernel: [ 2946.184780] Call Trace:
- Jan 15 18:58:07 minipc kernel: [ 2946.184783]  [<ffffffff8178100b>] dump_stack+0x4d/0x6f
- Jan 15 18:58:07 minipc kernel: [ 2946.184787]  [<ffffffff8107199d>] warn_slowpath_common+0x7d/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184789]  [<ffffffff81071a0c>] warn_slowpath_fmt+0x4c/0x50
- Jan 15 18:58:07 minipc kernel: [ 2946.184792]  [<ffffffff81258ed8>] ? kernfs_find_and_get_ns+0x48/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184795]  [<ffffffff8125c949>] sysfs_remove_group+0x99/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184798]  [<ffffffff814da277>] dpm_sysfs_remove+0x57/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184801]  [<ffffffff814cf4b5>] device_del+0x45/0x1d0
- Jan 15 18:58:07 minipc kernel: [ 2946.184804]  [<ffffffff814cf65e>] device_unregister+0x1e/0x70
- Jan 15 18:58:07 minipc kernel: [ 2946.184809]  [<ffffffffc0b3df89>] media_devnode_unregister+0x49/0x50 [media]
- Jan 15 18:58:07 minipc kernel: [ 2946.184813]  [<ffffffffc0b3daec>] media_device_unregister+0x5c/0x70 [media]
- Jan 15 18:58:07 minipc kernel: [ 2946.184816]  [<ffffffffc0b8a342>] uvc_delete+0x172/0x180 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184820]  [<ffffffffc0b8a439>] uvc_release+0x29/0x30 [uvcvideo]
- Jan 15 18:58:07 minipc kernel: [ 2946.184825]  [<ffffffffc0b4a9f9>] v4l2_device_release+0xd9/0x110 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184828]  [<ffffffff814ced02>] device_release+0x32/0xa0
- Jan 15 18:58:07 minipc kernel: [ 2946.184831]  [<ffffffff813a136a>] kobject_release+0x7a/0x1c0
- Jan 15 18:58:07 minipc kernel: [ 2946.184834]  [<ffffffff813a120d>] kobject_put+0x2d/0x60
- Jan 15 18:58:07 minipc kernel: [ 2946.184837]  [<ffffffff814cf017>] put_device+0x17/0x20
- Jan 15 18:58:07 minipc kernel: [ 2946.184841]  [<ffffffffc0b49491>] v4l2_release+0x51/0x80 [videodev]
- Jan 15 18:58:07 minipc kernel: [ 2946.184844]  [<ffffffff811e4593>] __fput+0xd3/0x230
- Jan 15 18:58:07 minipc kernel: [ 2946.184847]  [<ffffffff811e473e>] ____fput+0xe/0x10
- Jan 15 18:58:07 minipc kernel: [ 2946.184849]  [<ffffffff810926d7>] task_work_run+0xb7/0xf0
- Jan 15 18:58:07 minipc kernel: [ 2946.184853]  [<ffffffff81015267>] do_notify_resume+0x97/0xb0
- Jan 15 18:58:07 minipc kernel: [ 2946.184856]  [<ffffffff81788cea>] int_signal+0x12/0x17
- Jan 15 18:58:07 minipc kernel: [ 2946.184858] ---[ end trace 167074d7c3fac554 ]---
+ 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
+  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.
+  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
+  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

** Tags removed: kernel-bug-exists-upstream-3.19.0-031900rc4
** Tags added: kernel-bug-exists-upstream-3.19rc4

** Tags removed: kernel-bug-exists-upstream-3.19rc4
** Tags added: kernel-bug-exists-upstream-3.19-rc4

-- 
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/1411357

Title:
  crash in uvc_status_cleanup

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  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

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References

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