I added groovy-updates. 

The issues persist:

asif@ThinkPad-T510:~$ uname -a
Linux ThinkPad-T510 5.8.0-33-generic #36-Ubuntu SMP Wed Dec 9 09:14:40 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[  132.543468] ------------[ cut here ]------------
[  132.543469] refcount_t: underflow; use-after-free.
[  132.543557] WARNING: CPU: 0 PID: 2477 at lib/refcount.c:28 refcount_warn_saturate+0xae/0xf0
[  132.543577] Modules linked in: rfcomm ccm cmac algif_hash algif_skcipher af_alg bnep lz4 zram zfs(PO) zunicode(PO) zavl(PO) icp(PO) zcommon(PO) znvpair(PO) spl(O) zlua(PO) intel_powerclamp coretemp snd_hda_codec_hdmi snd_hda_codec_conexant kvm_intel snd_hda_codec_generic snd_hda_intel snd_intel_dspcfg snd_hda_codec kvm snd_hda_core thinkpad_acpi snd_hwdep nvram snd_pcm ledtrig_audio iwlmvm intel_cstate mac80211 uvcvideo videobuf2_vmalloc libarc4 snd_seq_midi snd_seq_midi_event videobuf2_memops snd_rawmidi joydev input_leds videobuf2_v4l2 videobuf2_common serio_raw snd_seq iwlwifi btusb snd_seq_device videodev snd_timer btrtl btbcm wmi_bmof btintel intel_ips mc bluetooth at24 cfg80211 ecdh_generic ecc snd mei_me soundcore mei mac_hid sch_fq_codel msr parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c crct10dif_pclmul nouveau crc32_pclmul ghash_clmulni_intel mxm_wmi i2c_algo_bit ttm aesni_intel drm_kms_helper syscopyarea sysfillrect sysimgblt
[  132.543642]  fb_sys_fops crypto_simd cec cryptd rc_core glue_helper firewire_ohci firewire_core sdhci_pci i2c_i801 ahci lpc_ich i2c_smbus psmouse libahci cqhci crc_itu_t drm e1000e sdhci wmi video
[  132.543660] CPU: 0 PID: 2477 Comm: Renderer Tainted: P           O      5.8.0-33-generic #36-Ubuntu
[  132.543662] Hardware name: LENOVO 43147PU/43147PU, BIOS 6MET92WW (1.52 ) 09/26/2012
[  132.543666] RIP: 0010:refcount_warn_saturate+0xae/0xf0
[  132.543670] Code: b8 48 6a 01 01 e8 a7 88 b1 ff 0f 0b 5d c3 80 3d a5 48 6a 01 00 75 91 48 c7 c7 00 47 5f 8d c6 05 95 48 6a 01 01 e8 87 88 b1 ff <0f> 0b 5d c3 80 3d 83 48 6a 01 00 0f 85 6d ff ff ff 48 c7 c7 58 47
[  132.543671] RSP: 0018:ffffb8284706fcc8 EFLAGS: 00010282
[  132.543673] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffff9753b3c18cd8
[  132.543675] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff9753b3c18cd0
[  132.543676] RBP: ffffb8284706fcc8 R08: 0000000000000004 R09: 0000000000000478
[  132.543678] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000004
[  132.543679] R13: ffff975302ee8800 R14: ffff9753a1a65000 R15: ffff9753a13c0000
[  132.543681] FS:  00007f4f4857a640(0000) GS:ffff9753b3c00000(0000) knlGS:0000000000000000
[  132.543683] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  132.543684] CR2: 00007f4f26e34000 CR3: 00000001e51de001 CR4: 00000000000206f0
[  132.543686] Call Trace:
[  132.543702]  ttm_bo_put+0x3f/0x50 [ttm]
[  132.543791]  nouveau_gem_new+0x8a/0x120 [nouveau]
[  132.543867]  ? nouveau_gem_new+0x120/0x120 [nouveau]
[  132.544020]  nouveau_gem_ioctl_new+0x5b/0xd0 [nouveau]
[  132.544095]  ? nouveau_gem_new+0x120/0x120 [nouveau]
[  132.544132]  drm_ioctl_kernel+0xae/0xf0 [drm]
[  132.544182]  drm_ioctl+0x238/0x3d0 [drm]
[  132.544257]  ? nouveau_gem_new+0x120/0x120 [nouveau]
[  132.544302]  ? futex_wake+0x155/0x180
[  132.544378]  nouveau_drm_ioctl+0x66/0xc0 [nouveau]
[  132.544383]  ksys_ioctl+0x8e/0xc0
[  132.544386]  __x64_sys_ioctl+0x1a/0x20
[  132.544392]  do_syscall_64+0x49/0xc0
[  132.544396]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  132.544399] RIP: 0033:0x7f4f6598c13b
[  132.544403] Code: 89 d8 49 8d 3c 1c 48 f7 d8 49 39 c4 72 b5 e8 1c ff ff ff 85 c0 78 ba 4c 89 e0 5b 5d 41 5c c3 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 2c 0d 00 f7 d8 64 89 01 48
[  132.544404] RSP: 002b:00007f4f485775c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  132.544407] RAX: ffffffffffffffda RBX: 00007f4f48577620 RCX: 00007f4f6598c13b
[  132.544408] RDX: 00007f4f48577620 RSI: 00000000c0306480 RDI: 0000000000000026
[  132.544409] RBP: 00000000c0306480 R08: 0000000000000000 R09: 00007f4f15192968
[  132.544411] R10: 00007f4f65700270 R11: 0000000000000246 R12: 00007f4f48577620
[  132.544412] R13: 0000000000000026 R14: 00007f4f58061190 R15: 0000000000001000
[  132.544416] ---[ end trace 8e1572f21249b152 ]---