Backtrace

WARNING: CPU: 1 PID: 5802 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 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 sunrpc snd_soc_acpi_intel_sdca_quirks soundwire_generic_allocation snd_soc_acpi soundwire_bus snd_soc_sdca snd_soc_avs snd_soc_hda_codec snd_hda_ext_core intel_uncore_frequency snd_hda_codec_hdmi intel_uncore_frequency_common iwlmvm snd_soc_core snd_hda_codec_generic intel_tcc_cooling snd_compress ac97_bus x86_pkg_temp_thermal snd_pcm_dmaengine intel_powerclamp snd_hda_intel coretemp
 snd_intel_dspcfg snd_intel_sdw_acpi kvm_intel mac80211 snd_hda_codec jc42 libarc4 kvm snd_hda_core snd_hwdep snd_seq btusb snd_seq_device iwlwifi iTCO_wdt snd_pcm intel_pmc_bxt irqbypass btrtl iTCO_vendor_support processor_thermal_device_pci_legacy btintel ee1004 intel_rapl_msr mei_hdcp btbcm mei_pxp rapl processor_thermal_device intel_cstate processor_thermal_wt_hint uvcvideo asus_nb_wmi asus_wmi uvc btmtk snd_timer sparse_keymap i2c_i801 processor_thermal_rfim videobuf2_vmalloc intel_uncore cfg80211 wmi_bmof pcspkr platform_profile bluetooth snd i2c_smbus processor_thermal_rapl mei_me videobuf2_memops soundcore intel_rapl_common videobuf2_v4l2 mei processor_thermal_wt_req videobuf2_common rfkill vfat idma64 fat intel_pch_thermal processor_thermal_power_floor processor_thermal_mbox int340x_thermal_zone intel_xhci_usb_role_switch intel_soc_dts_iosf intel_pmc_core pmt_telemetry pmt_class intel_vsec asus_wireless int3400_thermal acpi_pad acpi_thermal_rel joydev v4l2loopback(OE) loop nfnetlink zram
 lz4hc_compress lz4_compress i915 i2c_algo_bit drm_buddy ttm drm_display_helper polyval_clmulni spi_pxa2xx_platform polyval_generic hid_multitouch ghash_clmulni_intel dw_dmac sha512_ssse3 sha256_ssse3 sha1_ssse3 spi_pxa2xx_core cec i2c_hid_acpi i2c_hid video wmi serio_raw i2c_dev fuse v4l2loopback_dc(OE) videodev mc
CPU: 1 UID: 1000 PID: 5802 Comm: VideoDevicePoll Tainted: G        W  OE      6.14.11-300.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 90 0f e5 87 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:ffffca6b10ee7b20 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff892a87f41000 RCX: 0000000000000027
RDX: ffff892dceca1948 RSI: 0000000000000001 RDI: ffff892dceca1940
RBP: ffffca6b31c45000 R08: 0000000000000000 R09: ffffca6b10ee79c8
R10: ffffffff889368e8 R11: 00000000ffffdfff R12: ffff892a88823530
R13: ffff892ce5a8e620 R14: ffff892a806f0900 R15: 0000000000000000
FS:  00007f4febbfe6c0(0000) GS:ffff892dcec80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005613df6d0660 CR3: 00000003646aa004 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
 ? kmem_cache_free+0x492/0x4d0
 ? path_openat+0xcb/0x2b0
 ? path_openat+0xcb/0x2b0
 ? do_filp_open+0xd9/0x190
 ? put_unused_fd+0x2a/0x70
 ? do_sys_openat2+0x96/0xe0
 ? __x64_sys_openat+0x62/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? irqentry_exit_to_user_mode+0x16c/0x200
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f50745169cc
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:00007f4febbfd3f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000070 RCX: 00007f50745169cc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000070
RBP: 00007f4febbfd400 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4fed1ef8f0 R15: 00007f4febbfd4f0
 </TASK>