Backtrace

WARNING: CPU: 2 PID: 7502 at mm/vmalloc.c:3367 vfree.part.0+0x113/0x260
Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer xt_conntrack xt_MASQUERADE bridge stp llc xt_set ip_set xt_addrtype nft_compat overlay 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 nf_tables qrtr bnep snd_sof_pci_intel_skl snd_sof_intel_hda_generic soundwire_intel snd_sof_intel_hda_sdw_bpt snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda soundwire_cadence 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 crc8 soundwire_bus snd_soc_sdca snd_soc_avs snd_soc_hda_codec snd_hda_ext_core intel_uncore_frequency intel_uncore_frequency_common snd_soc_core intel_tcc_cooling x86_pkg_temp_thermal snd_compress intel_powerclamp ac97_bus coretemp iwlmvm snd_hda_codec_hdmi sunrpc snd_hda_codec_generic
 jc42 snd_pcm_dmaengine kvm_intel ee1004 snd_hda_intel mac80211 iTCO_wdt kvm snd_intel_dspcfg intel_pmc_bxt mei_hdcp snd_intel_sdw_acpi iTCO_vendor_support mei_pxp snd_hda_codec irqbypass btusb libarc4 rapl snd_hda_core btrtl snd_hwdep btintel snd_seq asus_nb_wmi intel_rapl_msr intel_cstate asus_wmi btbcm iwlwifi snd_seq_device btmtk sparse_keymap intel_uncore snd_pcm pcspkr wmi_bmof platform_profile bluetooth cfg80211 snd_timer snd processor_thermal_device_pci_legacy soundcore i2c_i801 processor_thermal_device i2c_smbus processor_thermal_wt_hint uvcvideo rfkill processor_thermal_rfim mei_me processor_thermal_rapl uvc videobuf2_vmalloc intel_rapl_common videobuf2_memops mei videobuf2_v4l2 processor_thermal_wt_req videobuf2_common processor_thermal_power_floor intel_pch_thermal processor_thermal_mbox idma64 int340x_thermal_zone intel_xhci_usb_role_switch intel_soc_dts_iosf vfat fat intel_pmc_core pmt_telemetry pmt_class asus_wireless int3400_thermal intel_vsec acpi_thermal_rel acpi_pad joydev
 v4l2loopback(OE) v4l2loopback_dc(OE) 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 spi_pxa2xx_core sha1_ssse3 cec i2c_hid_acpi i2c_hid video wmi serio_raw i2c_dev fuse videodev mc
CPU: 2 UID: 1000 PID: 7502 Comm: VideoDevicePoll Tainted: G        W  OE       6.15.4-200.fc42.x86_64 #1 PREEMPT(lazy) 
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 7e 13 02 00 48 89 df 48 83 c4 20 5b 5d 41 5c 41 5e e9 5c 0e 02 00 48 89 ee 48 c7 c7 00 c4 05 8c e8 ed 92 ca 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:ffffcca7471bbce0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8af7ca42a000 RCX: 0000000000000027
RDX: ffff8afb0ed1cb88 RSI: 0000000000000001 RDI: ffff8afb0ed1cb80
RBP: ffffcca79fb2d000 R08: 0000000000000000 R09: ffffcca7471bbb88
R10: ffffffff8cb3bb88 R11: 00000000ffffdfff R12: ffff8af7cc15c6c8
R13: ffff8af7c4826c20 R14: ffff8af7c05f5a80 R15: 0000000000000000
FS:  00007f74019fe6c0(0000) GS:ffff8afb81371000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000004c00a487fc CR3: 0000000242aa4002 CR4: 00000000003726f0
Call Trace:
 <TASK>
 v4l2_loopback_close+0x8b/0xf0 [v4l2loopback_dc]
 v4l2_release+0xd1/0x100 [videodev]
 __fput+0xe3/0x2a0
 __x64_sys_close+0x3d/0x80
 do_syscall_64+0x7b/0x160
 ? sched_clock+0x10/0x30
 ? sched_clock_cpu+0xb/0x30
 ? psi_group_change+0x19e/0x460
 ? update_curr+0x8f/0x270
 ? switch_mm_irqs_off+0x1a6/0x470
 ? finish_task_switch.isra.0+0x99/0x2c0
 ? rseq_get_rseq_cs+0x19/0x220
 ? rseq_ip_fixup+0x8c/0x1d0
 ? switch_fpu_return+0x4e/0xd0
 ? irqentry_exit_to_user_mode+0x1ca/0x200
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f748aa109cc
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:00007f74019fd3f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000043 RCX: 00007f748aa109cc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007f74019fd400 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7402ff45f0 R15: 00007f74019fd4f0
 </TASK>