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

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https://bugs.launchpad.net/bugs/1623467

Title:
  Kernel oops when unplugging UVC camera during streaming

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