Backtrace

WARNING: CPU: 3 PID: 4610 at mm/vmalloc.c:3367 vfree.part.0+0x113/0x260
Modules linked in: tun uinput rfcomm snd_seq_dummy snd_hrtimer xt_conntrack xt_MASQUERADE bridge stp llc xt_set xt_addrtype nft_compat 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 overlay ip_set nf_tables qrtr snd_sof_pci_intel_skl snd_sof_intel_hda_generic soundwire_intel soundwire_cadence bnep snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks soundwire_generic_allocation snd_soc_acpi soundwire_bus snd_soc_sdca snd_soc_avs snd_hda_codec_hdmi sunrpc snd_soc_hda_codec snd_hda_ext_core snd_hda_codec_generic iwlmvm snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec mac80211 snd_hda_core snd_hwdep intel_uncore_frequency
 intel_uncore_frequency_common snd_seq jc42 intel_tcc_cooling x86_pkg_temp_thermal libarc4 iTCO_wdt ee1004 btusb intel_powerclamp snd_seq_device intel_pmc_bxt coretemp btrtl iTCO_vendor_support btintel mei_pxp uvcvideo kvm_intel mei_hdcp btbcm intel_rapl_msr uvc snd_pcm iwlwifi btmtk kvm cfg80211 irqbypass asus_nb_wmi videobuf2_vmalloc bluetooth asus_wmi snd_timer rapl videobuf2_memops videobuf2_v4l2 processor_thermal_device_pci_legacy intel_cstate sparse_keymap processor_thermal_device snd i2c_i801 platform_profile intel_uncore videobuf2_common processor_thermal_wt_hint processor_thermal_rfim processor_thermal_rapl soundcore rfkill mei_me wmi_bmof i2c_smbus intel_rapl_common pcspkr vfat fat mei idma64 processor_thermal_wt_req processor_thermal_power_floor intel_pch_thermal intel_xhci_usb_role_switch processor_thermal_mbox int340x_thermal_zone intel_soc_dts_iosf intel_pmc_core pmt_telemetry int3400_thermal pmt_class acpi_thermal_rel intel_vsec asus_wireless acpi_pad joydev loop nfnetlink zram
 lz4hc_compress lz4_compress i915 i2c_algo_bit drm_buddy ttm drm_display_helper polyval_clmulni polyval_generic ghash_clmulni_intel sha512_ssse3 spi_pxa2xx_platform hid_multitouch sha256_ssse3 dw_dmac sha1_ssse3 spi_pxa2xx_core cec i2c_hid_acpi i2c_hid video wmi serio_raw fuse v4l2loopback_dc(OE) videodev mc
CPU: 3 UID: 1000 PID: 4610 Comm: VideoDevicePoll Tainted: G        W  OE      6.14.9-300.fc42.x86_64 #1
Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
Hardware name: ASUSTeK COMPUTER INC. X510UA/X510UA, BIOS X510UA.312 04/29/2020
RIP: 0010:vfree.part.0+0x113/0x260
Code: 48 8b 7b 20 e8 ae ac fa ff 48 89 df 48 83 c4 20 5b 5d 41 5c 41 5e e9 cc 04 02 00 48 89 ee 48 c7 c7 f0 e8 e4 9c e8 7d 2f cb ff <0f> 0b 48 83 c4 20 5b 5d 41 5c 41 5e c3 cc cc cc cc 85 c0 0f 84 21
RSP: 0018:ffffd02a878cfd00 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8c03c824c000 RCX: 0000000000000027
RDX: ffff8c070eda1948 RSI: 0000000000000001 RDI: ffff8c070eda1940
RBP: ffffd02a97d94000 R08: 0000000000000000 R09: ffffd02a878cfba8
R10: ffffffff9d9368e8 R11: 00000000ffffdfff R12: ffff8c03c11dd958
R13: ffff8c041caa1220 R14: ffff8c03c0443cc0 R15: 0000000000000000
FS:  00007fb156f716c0(0000) GS:ffff8c070ed80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000009ec077e6010 CR3: 000000015c8cc003 CR4: 00000000003726f0
Call Trace:
 <TASK>
 v4l2_loopback_close+0x8b/0xf0 [v4l2loopback_dc]
 v4l2_release+0xd1/0x100 [videodev]
 __fput+0xe3/0x2a0
 __x64_sys_close+0x3c/0x80
 do_syscall_64+0x7b/0x160
 ? update_load_avg+0x83/0x460
 ? set_next_entity+0xe2/0x200
 ? pick_next_task_fair+0x14a/0x400
 ? psi_task_switch+0x6b/0x210
 ? finish_task_switch.isra.0+0x99/0x2c0
 ? rseq_get_rseq_cs+0x19/0x220
 ? rseq_ip_fixup+0x8d/0x1d0
 ? switch_fpu_return+0x4e/0xd0
 ? irqentry_exit_to_user_mode+0x1ca/0x200
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fb1e0e209cc
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 f0 98 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 52 99 f8 ff 8b 45 fc c9
RSP: 002b:00007fb156f703f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000027 RCX: 00007fb1e0e209cc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000027
RBP: 00007fb156f70400 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb1587ef7f0 R15: 00007fb156f704f0
 </TASK>