[Bug 1388239] Re: CPU: 1 PID: 11025 at /build/buildd/linux-3.16.0/drivers/media/v4l2-core/videobuf2-core.c:2120 __vb2_queue_cancel+0x116/0x180 [videobuf2_core]()

Serhiy Zahoriya 1388239 at bugs.launchpad.net
Wed Nov 19 11:07:06 UTC 2014 

I have slightly different stacktrace, but the warning is the same.

[  137.003774] usb 1-1.6: new full-speed USB device number 4 using ehci-pci
[  137.103709] usb 1-1.6: New USB device found, idVendor=04da, idProduct=2318
[  137.103714] usb 1-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  137.103717] usb 1-1.6: Product: DVC
[  137.103720] usb 1-1.6: Manufacturer: Panasonic
[  137.103731] usb 1-1.6: SerialNumber: 1146aa67
[  137.131864] media: Linux media interface: v0.10
[  137.139750] Linux video capture interface: v2.00
[  137.143803] usbcore: registered new interface driver snd-usb-audio
[  137.157555] uvcvideo: Found UVC 1.00 device DVC (04da:2318)
[  137.162598] usbcore: registered new interface driver uvcvideo
[  137.162604] USB Video Class driver (1.1.1)
[  137.231417] uvcvideo: Failed to submit URB 0 (-28).
[  137.231728] ------------[ cut here ]------------
[  137.231736] WARNING: CPU: 0 PID: 2505 at /build/buildd/linux-3.16.0/drivers/media/v4l2-core/videobuf2-core.c:2120 __vb2_queue_cancel+0x116/0x180 [videobuf2_core]()
[  137.231738] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common snd_usb_audio videodev snd_usbmidi_lib media snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic bnep intel_rapl rfcomm x86_pkg_temp_thermal intel_powerclamp coretemp bluetooth kvm_intel 6lowpan_iphc kvm snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep crct10dif_pclmul snd_pcm snd_seq_midi crc32_pclmul snd_seq_midi_event ghash_clmulni_intel hid_generic snd_rawmidi gpio_ich aesni_intel usbhid mei_me hid aes_x86_64 mei lrw gf128mul glue_helper snd_seq ablk_helper cryptd snd_seq_device snd_timer snd serio_raw soundcore tpm_infineon shpchp lpc_ich mac_hid parport_pc ppdev lp parport nouveau mxm_wmi video i2c_algo_bit ttm drm_kms_helper ahci drm r8169 libahci mii wmi
[  137.231790] CPU: 0 PID: 2505 Comm: skype Not tainted 3.16.0-24-generic #32-Ubuntu
[  137.231792] Hardware name: MSI MS-7681/P67A-GD53 (MS-7681), BIOS V1.9 03/02/2011
[  137.231794]  0000000000000009 ffff88022613bae8 ffffffff8177fcbc 0000000000000000
[  137.231796]  ffff88022613bb20 ffffffff8106fd8d 0000000000000000 0000000000000000
[  137.231799]  ffff8800ad4a8af0 ffff8800ad4a88d8 ffff8800358a96c0 ffff88022613bb30
[  137.231801] Call Trace:
[  137.231808]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
[  137.231812]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
[  137.231823]  [<ffffffff8106fe6a>] warn_slowpath_null+0x1a/0x20
[  137.231827]  [<ffffffffc0801596>] __vb2_queue_cancel+0x116/0x180 [videobuf2_core]
[  137.231832]  [<ffffffffc0802cf5>] vb2_internal_streamoff+0x35/0x90 [videobuf2_core]
[  137.231836]  [<ffffffffc0802db5>] vb2_streamoff+0x65/0x70 [videobuf2_core]
[  137.231839]  [<ffffffffc07e6855>] uvc_queue_enable+0x65/0xa0 [uvcvideo]
[  137.231843]  [<ffffffffc07eb701>] uvc_video_enable+0x141/0x1b0 [uvcvideo]
[  137.231847]  [<ffffffffc07e8935>] uvc_v4l2_do_ioctl+0x10b5/0x14b0 [uvcvideo]
[  137.231851]  [<ffffffff811c3559>] ? __kmalloc+0x169/0x260
[  137.231858]  [<ffffffffc07c2fdf>] ? video_usercopy+0x7f/0x5d0 [videodev]
[  137.231863]  [<ffffffffc07c32c6>] video_usercopy+0x366/0x5d0 [videodev]
[  137.231866]  [<ffffffffc07e7880>] ? uvc_v4l2_open+0x150/0x150 [uvcvideo]
[  137.231870]  [<ffffffff811a7917>] ? remap_vmalloc_range_partial+0x87/0xc0
[  137.231873]  [<ffffffffc07e6c3f>] uvc_v4l2_ioctl+0x2f/0x70 [uvcvideo]
[  137.231878]  [<ffffffffc07bd734>] v4l2_ioctl+0x154/0x190 [videodev]
[  137.231884]  [<ffffffffc07cc8fb>] do_video_ioctl+0x27b/0x1500 [videodev]
[  137.231888]  [<ffffffff811a00cf>] ? do_mmap_pgoff+0x31f/0x400
[  137.231892]  [<ffffffff81187c09>] ? vm_mmap_pgoff+0x99/0xc0
[  137.231898]  [<ffffffffc07cdbf2>] v4l2_compat_ioctl32+0x72/0xad [videodev]
[  137.231901]  [<ffffffff81234ac0>] compat_SyS_ioctl+0xc0/0x320
[  137.231904]  [<ffffffff8178a4dc>] sysenter_dispatch+0x7/0x21
[  137.231905] ---[ end trace bbfafd9db4b1a20e ]---

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Title:
  CPU: 1 PID: 11025 at
  /build/buildd/linux-3.16.0/drivers/media/v4l2-core/videobuf2-core.c:2120
  __vb2_queue_cancel+0x116/0x180 [videobuf2_core]()

Status in “linux” package in Ubuntu:
  Confirmed
Status in “ubuntu-release-upgrader” package in Ubuntu:
  Invalid
Status in “v4l-utils” package in Ubuntu:
  New

Bug description:
  Found theses warnings when using the webcam on flash site under
  firefox.

  
  [418114.773634] ------------[ cut here ]------------
  [418114.773674] WARNING: CPU: 1 PID: 11025 at /build/buildd/linux-3.16.0/drivers/media/v4l2-core/videobuf2-core.c:2120 __vb2_queue_cancel+0x116/0x180 [videobuf2_core]()
  [418114.773677] Modules linked in: btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c 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 snd_hrtimer nfsv3 rpcsec_gss_krb5 nfsv4 ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr bnep iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi rfcomm bluetooth 6lowpan_iphc nfsd auth_rpcgss binfmt_misc nfs_acl nfs lockd sunrpc fscache dm_crypt ir_lirc_codec lirc_dev ir_rc5_decoder ir_mce_kbd_decoder ir_sharp_decoder ir_jvc_decoder ir_sony_decoder ir_sanyo_decoder ir_rc6_decoder ir_nec_decoder rc_rc6_mce mceusb rc_core pl2303 usbserial snd_hda_codec_realtek uvcvideo videobuf2_vmalloc
  [418114.773763]  videobuf2_memops snd_hda_codec_generic snd_usb_audio videobuf2_core v4l2_common snd_hda_intel videodev snd_hda_controller media joydev snd_usbmidi_lib snd_hda_codec snd_hwdep coretemp snd_pcm kvm_intel snd_seq_midi dm_multipath kvm snd_seq_midi_event scsi_dh snd_rawmidi snd_seq snd_seq_device serio_raw snd_timer cuse snd lpc_ich parport_pc soundcore ppdev mac_hid lp parport i915 hid_generic e1000e ptp video i2c_algo_bit drm_kms_helper usbhid drm firewire_ohci hid pata_acpi firewire_core crc_itu_t pps_core
  [418114.773829] CPU: 1 PID: 11025 Comm: plugin-containe Tainted: G        W     3.16.0-23-lowlatency #31-Ubuntu
  [418114.773833] Hardware name: AOpen i965GMx-IF/i965GMx-IF, BIOS 6.00 PG 10/03/2008
  [418114.773836]  0000000000000009 ffff8800115c7c00 ffffffff8177ec5d 0000000000000000
  [418114.773843]  ffff8800115c7c38 ffffffff8107183d 0000000000000000 0000000000000000
  [418114.773848]  ffff88008b044af0 ffff88008b0448d8 ffff8801215cb180 ffff8800115c7c48
  [418114.773854] Call Trace:
  [418114.773867]  [<ffffffff8177ec5d>] dump_stack+0x4d/0x6f
  [418114.773875]  [<ffffffff8107183d>] warn_slowpath_common+0x7d/0xa0
  [418114.773881]  [<ffffffff8107191a>] warn_slowpath_null+0x1a/0x20
  [418114.773893]  [<ffffffffc0701596>] __vb2_queue_cancel+0x116/0x180 [videobuf2_core]
  [418114.773905]  [<ffffffffc0702cf5>] vb2_internal_streamoff+0x35/0x90 [videobuf2_core]
  [418114.773916]  [<ffffffffc0702db5>] vb2_streamoff+0x65/0x70 [videobuf2_core]
  [418114.773928]  [<ffffffffc075e855>] uvc_queue_enable+0x65/0xa0 [uvcvideo]
  [418114.773939]  [<ffffffffc076360a>] uvc_video_enable+0x4a/0x1b0 [uvcvideo]
  [418114.773958]  [<ffffffffc07601e2>] uvc_v4l2_do_ioctl+0x962/0x14b0 [uvcvideo]
  [418114.773962]  [<ffffffff81192373>] ? copy_page_from_iter_iovec+0x183/0x2d0
  [418114.773976]  [<ffffffffc06e02c6>] video_usercopy+0x366/0x600 [videodev]
  [418114.773979]  [<ffffffff811e4bd9>] ? __sb_start_write+0x49/0xf0
  [418114.773985]  [<ffffffffc075f880>] ? uvc_v4l2_open+0x150/0x150 [uvcvideo]
  [418114.773988]  [<ffffffff811e4b61>] ? __sb_end_write+0x31/0x60
  [418114.773992]  [<ffffffff811eaad3>] ? pipe_write+0x393/0x450
  [418114.773997]  [<ffffffffc075ec3f>] uvc_v4l2_ioctl+0x2f/0x70 [uvcvideo]
  [418114.774004]  [<ffffffffc06da734>] v4l2_ioctl+0x154/0x190 [videodev]
  [418114.774008]  [<ffffffff811f6468>] do_vfs_ioctl+0x2c8/0x4a0
  [418114.774011]  [<ffffffff812007de>] ? __fget+0x6e/0xb0
  [418114.774029]  [<ffffffff811f66c1>] SyS_ioctl+0x81/0xa0
  [418114.774039]  [<ffffffff8178666d>] system_call_fastpath+0x1a/0x1f
  [418114.774084] ---[ end trace 36d13fa659268ece ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: ubuntu-release-upgrader-core 1:14.10.9
  ProcVersionSignature: Ubuntu 3.16.0-23.31-lowlatency 3.16.4
  Uname: Linux 3.16.0-23-lowlatency x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Fri Oct 31 20:35:55 2014
  InstallationDate: Installed on 2011-10-23 (1103 days ago)
  InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to utopic on 2014-10-24 (7 days ago)

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