Backtrace

WARNING: CPU: 2 PID: 8380 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 sunrpc snd_hda_ext_core snd_soc_core snd_hda_codec_hdmi snd_compress snd_hda_codec_generic ac97_bus snd_pcm_dmaengine snd_hda_intel iwlmvm snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec intel_uncore_frequency
 intel_uncore_frequency_common snd_hda_core intel_tcc_cooling snd_hwdep mac80211 x86_pkg_temp_thermal intel_powerclamp snd_seq coretemp btusb jc42 snd_seq_device kvm_intel btrtl libarc4 mei_hdcp mei_pxp uvcvideo btintel iTCO_wdt intel_rapl_msr btbcm kvm iwlwifi uvc intel_pmc_bxt processor_thermal_device_pci_legacy ee1004 iTCO_vendor_support videobuf2_vmalloc btmtk processor_thermal_device processor_thermal_wt_hint asus_nb_wmi processor_thermal_rfim videobuf2_memops snd_pcm processor_thermal_rapl irqbypass bluetooth intel_rapl_common videobuf2_v4l2 snd_timer rapl asus_wmi cfg80211 vfat fat snd sparse_keymap intel_cstate processor_thermal_wt_req mei_me processor_thermal_power_floor soundcore wmi_bmof platform_profile videobuf2_common intel_pmc_core i2c_i801 processor_thermal_mbox mei i2c_smbus intel_uncore pcspkr rfkill intel_pch_thermal pmt_telemetry idma64 int340x_thermal_zone pmt_class intel_xhci_usb_role_switch intel_soc_dts_iosf int3400_thermal acpi_thermal_rel acpi_pad intel_vsec asus_wireless joydev
 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 dw_dmac sha256_ssse3 sha1_ssse3 spi_pxa2xx_core cec video i2c_hid_acpi i2c_hid wmi serio_raw i2c_dev fuse videodev mc
CPU: 2 UID: 1000 PID: 8380 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 91 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:ffffd23f52953ca0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff89108481c000 RCX: 0000000000000027
RDX: ffff8913ced1cb88 RSI: 0000000000000001 RDI: ffff8913ced1cb80
RBP: ffffd23f5d336000 R08: 0000000000000000 R09: ffffd23f52953b48
R10: ffffffff91b3bb88 R11: 00000000ffffdfff R12: ffff89108689c3b0
R13: ffff8910b3587220 R14: ffff89108e4233c0 R15: 0000000000000000
FS:  00007f3b4a0b66c0(0000) GS:ffff89143c371000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000007c1163f000 CR3: 00000002384e8001 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
 ? alloc_fd+0xbd/0x110
 ? do_sys_openat2+0xa2/0xe0
 ? __x64_sys_openat+0x61/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? do_syscall_64+0x87/0x160
 ? do_syscall_64+0x87/0x160
 ? do_syscall_64+0x87/0x160
 ? do_syscall_64+0x87/0x160
 ? do_syscall_64+0x87/0x160
 ? __irq_exit_rcu+0x4c/0xf0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f3bd31429cc
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:00007f3b4a0b53f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00007f3bd31429cc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001a
RBP: 00007f3b4a0b5400 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3b4b7f62f0 R15: 00007f3b4a0b54f0
 </TASK>