openafs 1.6.14-1 causes kernel bug in 15.10

[a]

Installing the package openafs-modules-dkms 1.6.14-1 in Xubuntu 15.10 builds openafs without error messages. Prior to a restart of the machine file admission sometimes seems slow but finally works, also on afs.
Subsequent shutdown of the computer is unsuccessful. After hard reset a restart will fail; syslog states a tainted kernel and a kernel bug as follows:
"Nov 7 00:31:30 hp kernel: [ 206.737813] openafs: module license 'http://www.openafs.org/dl/license10.html' taints kernel.
Nov 7 00:31:30 hp kernel: [ 206.738886] openafs: module verification failed: signature and/or required key missing - tainting kernel
Nov 7 00:31:37 hp kernel: [ 213.563023] kernel BUG at /var/lib/dkms/openafs/1.6.14/build/src/libafs/MODLOAD-4.2.0-17-generic-SP/osi_alloc.c:356!
Nov 7 00:31:37 hp kernel: [ 213.569081] Modules linked in: ctr ccm openafs(POE) binfmt_misc bnep drbg ansi_cprng dm_crypt nls_iso8859_1 ar5523 amd_freq_sensitivity kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw hp_wmi gf128mul sparse_keymap glue_helper uvcvideo videobuf2_vmalloc ablk_helper videobuf2_memops cryptd videobuf2_core arc4 v4l2_common videodev rtl8723be btcoexist media btusb btrtl btbcm rtl8723_common rtl_pci btintel bluetooth joydev rtlwifi input_leds mac80211 serio_raw cfg80211 snd_hda_codec_realtek edac_core snd_hda_codec_generic snd_hda_codec_hdmi edac_mce_amd fam15h_power k10temp snd_hda_intel snd_hda_codec snd_seq_midi snd_seq_midi_event snd_hda_core i2c_piix4 snd_rawmidi snd_hwdep snd_seq snd_pcm snd_seq_device snd_timer snd soundcore shpchp hp_wireless mac_hid parport_pc ppdev lp parport autofs4 hid_generic usbhid hid sdhci_pci psmouse sdhci i2c_algo_bit ttm ahci drm_kms_helper libahci drm r8169 mii wmi video
Nov 7 00:31:37 hp-tragbar-2015 kernel: [ 213.601107] RIP: 0010:[<ffffffffc06cec31>] [<ffffffffc06cec31>] osi_linux_free+0xb1/0xc0 [openafs]
Nov 7 00:31:37 hp kernel: [ 213.656682] [<ffffffffc0685e7b>] afs_osi_Free+0x2b/0x30 [openafs]
Nov 7 00:31:37 hp kernel: [ 213.660510] [<ffffffffc06d2231>] afs_fill_super+0x261/0x3f0 [openafs]
Nov 7 00:31:37 hp kernel: [ 213.664303] [<ffffffffc06d1fd0>] ? afs_alloc_inode+0x20/0x20 [openafs]
Nov 7 00:31:37 hp kernel: [ 213.671760] [<ffffffffc06d1df8>] afs_mount+0x18/0x20 [openafs]
Nov 7 00:31:37 hp kernel: [ 213.709672] RIP [<ffffffffc06cec31>] osi_linux_free+0xb1/0xc0 [openafs]
Nov 7 00:31:37 hp systemd[1]: openafs-client.service: Control process exited, code=killed status=11
Nov 7 00:31:37 hp systemd[1]: openafs-client.service: Unit entered failed state.
Nov 7 00:31:37 hp systemd[1]: openafs-client.service: Failed with result 'signal'."

As a remedy openafs-modules-dkms must be removed in recovery mode. Openafs thus can't be used as intended.