Tested with 4.8.0-040800rc6-generic as requested and i get the same oopses on disconnect:
------------[ cut here ]------------ [ 40.452197] WARNING: CPU: 0 PID: 1757 at /home/kernel/COD/linux/fs/sysfs/group.c:237 device_del+0x54/0x250 [ 40.452197] sysfs group ffffffff820ebbe0 not found for kobject 'event20' [ 40.452198] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev media fuse bnep binfmt_misc nls_utf8 nls_cp437 vfat snd_hda_codec_hdmi fat dell_wmi sparse_keymap snd_hda_codec_idt dell_laptop dell_smbios snd_hda_codec_generic dcdbas intel_rapl x86_pkg_temp_thermal intel_powerclamp snd_hda_intel coretemp crct10dif_pclmul arc4 snd_hda_codec crc32_pclmul dell_smm_hwmon snd_hda_core snd_hwdep ghash_clmulni_intel snd_pcm iwldvm mac80211 aesni_intel snd_seq_midi btusb aes_x86_64 lrw snd_seq_midi_event btrtl gf128mul btbcm glue_helper ablk_helper cryptd btintel bluetooth intel_cstate snd_rawmidi intel_rapl_perf iwlwifi snd_seq efi_pstore cfg80211 sg lpc_ich joydev efivars serio_raw snd_seq_device mfd_core snd_timer dell_smo8800 dell_rbtn ac rfkill snd battery [ 40.452235] evdev mei_me mei soundcore shpchp tpm_tis tpm_tis_core tpm kvm_intel kvm irqbypass parport_pc ppdev lp parport efivarfs autofs4 ext4 crc16 jbd2 fscrypto mbcache sr_mod cdrom sd_mod hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid ahci libahci i915 libata crc32c_intel psmouse scsi_mod ehci_pci ehci_hcd i2c_algo_bit xhci_pci xhci_hcd drm_kms_helper e1000e syscopyarea sysfillrect usbcore sysimgblt fb_sys_fops ptp drm pps_core usb_common wmi thermal fjes video button [ 40.452257] CPU: 0 PID: 1757 Comm: guvcview Not tainted 4.8.0-040800rc6-generic #201609121119 [ 40.452258] Hardware name: Dell Inc. Latitude E6430/0CPWYR, BIOS A17 08/19/2015 [ 40.452259] 0000000000000286 000000008d1cd9cb ffffffff8173fb84 ffff8b2690ccfd08 [ 40.452261] 0000000000000000 ffffffff8147f69e ffff8b2664aad000 ffff8b2690ccfd60 [ 40.452262] ffff8b26904fb240 ffff8b26711a41e0 ffff8b2659d26900 ffff8b266db74f18 [ 40.452264] Call Trace: [ 40.452267] [<ffffffff8173fb84>] ? dump_stack+0x5c/0x78 [ 40.452270] [<ffffffff8147f69e>] ? __warn+0xbe/0xe0 [ 40.452271] [<ffffffff8147f71f>] ? warn_slowpath_fmt+0x5f/0x80 [ 40.452272] [<ffffffff818740c4>] ? device_del+0x54/0x250 [ 40.452276] [<ffffffffc08691ae>] ? evdev_disconnect+0x1e/0x50 [evdev] [ 40.452277] [<ffffffff818a86e6>] ? __input_unregister_device+0xb6/0x160 [ 40.452279] [<ffffffff818a9431>] ? input_unregister_device+0x41/0x70 [ 40.452282] [<ffffffffc0cfd1c5>] ? uvc_delete+0x15/0x160 [uvcvideo] [ 40.452284] [<ffffffff8187390d>] ? device_release+0x2d/0x90 [ 40.452286] [<ffffffff81742155>] ? kobject_release+0x65/0x180 [ 40.452291] [<ffffffffc0caf419>] ? v4l2_release+0x49/0x80 [videodev] [ 40.452293] [<ffffffff816122cd>] ? __fput+0xcd/0x1e0 [ 40.452294] [<ffffffff8149d639>] ? task_work_run+0x79/0xa0 [ 40.452296] [<ffffffff814032aa>] ? exit_to_usermode_loop+0xba/0xc0 [ 40.452297] [<ffffffff81403b35>] ? syscall_return_slowpath+0x45/0x50 [ 40.452299] [<ffffffff81a1d27e>] ? entry_SYSCALL_64_fastpath+0xa6/0xa8 [ 40.452300] ---[ end trace 0cd164b3c8893bfa ]--- [ 40.476189] ------------[ cut here ]------------ ... ** Tags added: kernel-bug-exists-upstream -- 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/1623467 Title: Kernel oops when unplugging UVC camera during streaming Status in linux package in Ubuntu: Incomplete Bug description: Start guvcview to start streaming then unplug the camera. This results in a kernel oops. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: greg 3410 F.... pulseaudio CurrentDesktop: Unity Date: Wed Sep 14 13:53:47 2016 HibernationDevice: RESUME=UUID=a594a201-ee4c-4714-802a-7e54528de228 InstallationDate: Installed on 2016-06-04 (102 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Dell Inc. Latitude E6430 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed root=UUID=0b0f248e-a139-4618-ab3c-fac69e09dc86 ro quiet splash crashkernel=384M-:128M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware 1.157.3 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/19/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A17 dmi.board.name: 0CPWYR dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA17:bd08/19/2015:svnDellInc.:pnLatitudeE6430:pvr01:rvnDellInc.:rn0CPWYR:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6430 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. 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