Backtrace

WARNING: CPU: 1 PID: 4253 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 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 ip_set nf_tables qrtr bnep snd_sof_pci_intel_skl snd_sof_intel_hda_generic soundwire_intel soundwire_cadence 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_soc_hda_codec sunrpc snd_hda_ext_core intel_uncore_frequency iwlmvm intel_uncore_frequency_common snd_soc_core intel_tcc_cooling x86_pkg_temp_thermal snd_compress ac97_bus intel_powerclamp coretemp snd_pcm_dmaengine mac80211 snd_hda_codec_hdmi snd_hda_codec_generic
 snd_hda_intel libarc4 snd_intel_dspcfg kvm_intel snd_intel_sdw_acpi snd_hda_codec btusb btrtl iwlwifi snd_hda_core btintel kvm snd_hwdep jc42 uvcvideo btbcm snd_seq uvc snd_seq_device cfg80211 videobuf2_vmalloc btmtk videobuf2_memops iTCO_wdt snd_pcm videobuf2_v4l2 ee1004 irqbypass bluetooth asus_nb_wmi intel_pmc_bxt iTCO_vendor_support rapl asus_wmi intel_cstate sparse_keymap mei_pxp mei_hdcp snd_timer platform_profile snd videobuf2_common i2c_i801 intel_rapl_msr i2c_smbus rfkill soundcore intel_uncore wmi_bmof pcspkr vfat fat processor_thermal_device_pci_legacy mei_me processor_thermal_device processor_thermal_wt_hint processor_thermal_rfim processor_thermal_rapl mei intel_rapl_common idma64 intel_pch_thermal processor_thermal_wt_req processor_thermal_power_floor processor_thermal_mbox int340x_thermal_zone intel_soc_dts_iosf intel_xhci_usb_role_switch intel_pmc_core pmt_telemetry int3400_thermal pmt_class acpi_thermal_rel acpi_pad intel_vsec asus_wireless 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 hid_multitouch sha256_ssse3 spi_pxa2xx_platform dw_dmac sha1_ssse3 spi_pxa2xx_core cec i2c_hid_acpi i2c_hid video wmi serio_raw fuse v4l2loopback_dc(OE) videodev mc
CPU: 1 UID: 1000 PID: 4253 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 91 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:ffffd27586ff3c70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8e0f08456000 RCX: 0000000000000027
RDX: ffff8e124eca1948 RSI: 0000000000000001 RDI: ffff8e124eca1940
RBP: ffffd27597a99000 R08: 0000000000000000 R09: ffffd27586ff3b18
R10: ffffffff929368e8 R11: 00000000ffffdfff R12: ffff8e0f017809e0
R13: ffff8e0f73623ca0 R14: ffff8e0f00551000 R15: 0000000000000000
FS:  00007e218ddfe6c0(0000) GS:ffff8e124ec80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000004f4000dd040 CR3: 00000001aaa36003 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
 ? do_sys_openat2+0x96/0xe0
 ? __x64_sys_openat+0x62/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? rseq_ip_fixup+0x8d/0x1d0
 ? switch_fpu_return+0x4e/0xd0
 ? syscall_exit_to_user_mode+0x1d5/0x210
 ? do_syscall_64+0x87/0x160
 ? __x64_sys_openat+0x62/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? do_syscall_64+0x87/0x160
 ? __irq_exit_rcu+0x4c/0xf0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6c1707a48c
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 c0 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 22 99 f8 ff 8b 45 fc c9
RSP: 002b:00007e218ddfd4a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007e218f3ef7f0 RCX: 00007f6c1707a48c
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000029
RBP: 00007e218ddfd4b0 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000029
R13: 0000000000000000 R14: 0000000000000000 R15: 00007e218ddfd530
 </TASK>