Backtrace

WARNING: CPU: 3 PID: 4605 at mm/vmalloc.c:2826 vfree.part.0+0x106/0x230
Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer ip6table_nat tun nvidia_drm(POE) nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nvidia_modeset(POE) nvidia_uvm(POE) ip_set nf_tables nfnetlink qrtr nvidia(POE) bnep sunrpc binfmt_misc vfat fat ath10k_pci ath10k_core snd_sof_amd_vangogh snd_sof_amd_rembrandt snd_sof_amd_renoir snd_sof_amd_acp snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_hda_codec_realtek mac80211 snd_soc_core snd_hda_codec_generic intel_rapl_msr snd_hda_codec_hdmi ledtrig_audio intel_rapl_common snd_hda_intel edac_mce_amd snd_compress snd_intel_dspcfg ac97_bus btusb snd_intel_sdw_acpi snd_pcm_dmaengine uvcvideo btrtl snd_hda_codec kvm_amd snd_pci_ps btintel uvc snd_rpl_pci_acp6x libarc4 videobuf2_vmalloc btbcm ath snd_hda_core snd_pci_acp6x btmtk snd_hwdep kvm bluetooth videobuf2_memops irqbypass
 snd_seq videobuf2_v4l2 snd_seq_device videobuf2_common rapl snd_pcm snd_pci_acp5x wmi_bmof cfg80211 pcspkr snd_timer acpi_cpufreq snd_rn_pci_acp3x snd_acp_config ideapad_laptop sparse_keymap snd_soc_acpi snd i2c_piix4 platform_profile snd_pci_acp3x k10temp cm32181 soundcore rfkill industrialio joydev v4l2loopback(OE) v4l2loopback_dc(OE) loop zram amdgpu i2c_algo_bit drm_ttm_helper ttm crct10dif_pclmul crc32_pclmul drm_exec crc32c_intel drm_suballoc_helper polyval_clmulni amdxcp drm_buddy polyval_generic gpu_sched nvme ghash_clmulni_intel hid_multitouch drm_display_helper nvme_core sha512_ssse3 sha256_ssse3 sha1_ssse3 ccp r8169 cec sp5100_tco nvme_common video wmi i2c_hid_acpi i2c_hid serio_raw ip6_tables ip_tables fuse videodev mc
CPU: 3 PID: 4605 Comm: VideoDevicePoll Tainted: P           OE      6.6.9-200.fc39.x86_64 #1
Hardware name: LENOVO 82EY/LNVNB161216, BIOS FCCN13WW 06/29/2020
RIP: 0010:vfree.part.0+0x106/0x230
Code: fb ff 4c 89 e7 5b 5d 41 5c 41 5d 41 5e e9 d2 30 fc ff 48 83 e8 01 e9 5a ff ff ff 48 89 de 48 c7 c7 68 5a 92 87 e8 3a 01 d4 ff <0f> 0b 5b 5d 41 5c 41 5d 41 5e e9 0b 7d c2 00 8b 48 28 85 d2 0f 84
RSP: 0018:ffffc90010f8fe80 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffffc9001590d000 RCX: 0000000000000027
RDX: ffff8883ff6e1588 RSI: 0000000000000001 RDI: ffff8883ff6e1580
RBP: ffff88830ca5eec0 R08: 0000000000000000 R09: ffffc90010f8fd08
R10: 0000000000000003 R11: ffffffff88346508 R12: 0000000000000000
R13: ffff8881c0e3af20 R14: ffff888100595600 R15: 0000000000000000
FS:  00007f42daffb6c0(0000) GS:ffff8883ff6c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f433bd7e000 CR3: 00000001fdfea000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 ? vfree.part.0+0x106/0x230
 ? __warn+0x81/0x130
 ? vfree.part.0+0x106/0x230
 ? report_bug+0x171/0x1a0
 ? srso_return_thunk+0x5/0x10
 ? console_unlock+0x78/0x120
 ? handle_bug+0x3c/0x80
 ? exc_invalid_op+0x17/0x70
 ? asm_exc_invalid_op+0x1a/0x20
 ? vfree.part.0+0x106/0x230
 v4l2_loopback_close+0x8e/0x110 [v4l2loopback_dc]
 v4l2_release+0xf3/0x100 [videodev]
 __fput+0xf5/0x290
 __x64_sys_close+0x3d/0x80
 do_syscall_64+0x60/0x90
 ? do_syscall_64+0x6c/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f4336a19a3c
Code: 0f 05 48 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d fc e8 80 65 f8 ff 8b 7d fc 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2c 89 d7 89 45 fc e8 e2 65 f8 ff 8b 45 fc c9
RSP: 002b:00007f42daffa630 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000000000000002a RCX: 00007f4336a19a3c
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000002a
RBP: 00007f42daffa640 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f42dea09dd0 R15: 00007f42daffa730
 </TASK>